Machine Design and Shop Practice (MDSP) Inhouse Practice Exam

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• Saint-Venant's Theory is the name given to which theory?
• Gears are considered to be medium velocity type if their peripheral velocity lies in which range?
• Shoe is constrained to move towards the drum to compensate for the moment acting.
• Which coupling should be selected when two intersecting shafts must transmit rotary motion while the angle between them varies during operation?
• Which design modification reduces the stress concentration factor?
• In engineering drawings, which line is used to indicate the center of symmetry and proper alignment for features?
• Which mechanism is an inversion of the double slider-crank chain?
• Automobile steering gear is an example of
• Degrees of polymerization for commercial plastics are usually less than which of the following values?
• Which condition describes a surface that is comparatively free of stress?
• The lead screw of a precision lathe typically uses a thread form that provides good efficiency while handling axial loads. Which form is this?
• Invar alloy is primarily alloyed with which element to achieve its characteristic properties?
• Addition of vanadium to steel improves which property?
• According to Hooke's Law, within the proportional limit, which statement best describes the relationship between stress and strain?
• A bolt connecting a vibrating machine base fractured at the thread root after several months of service. Beach marks on the fracture surface indicate which failure mechanism?
• For sunk key, where is the keyway located?
• To maximize energy storage of a flywheel at a fixed speed, you should concentrate more mass near the rim rather than near the hub.
• Eye bolts are used for
• Spelter is another name for which of the following?
• During the inspection of a roller chain, which dimension is commonly checked to determine whether excessive wear has occurred?
• Which option represents a single crystal grown by vapor deposition?
• Forging possesses the following disadvantage:
• Which nut type is designed to be hand-tightened due to its knurled exterior?
• Which set of accelerations is involved in the motion of the piston inside the cylinder of a uniformly rotating cylinder mechanism?
• In sulfuric acid, which alloy is suitable for handling acid in concentrations up to 50% and at boiling point?
• Which statement about involute gears is false?
• Which statement is correct about the use of multiple threads in power screws?
• Which type of gears are used for shaft axes having an offset?
• Which statement best describes a riveted joint?
• For an element subjected to pure shear stress, the normal stresses on planes oriented at 45 degrees to the original shear planes are:
• What does a double-start thread imply about the lead compared with the pitch?
• At the instant a vibrating body passes through its equilibrium position, which statement about energy is correct?
• Which drawing is primarily prepared to show the relationship and fit of individual parts after fabrication?
• In watchmaking, which gear type is commonly used due to its tooth profile?
• Why are plasticizers added to plastics?
• To promote uniform wear on meshing gear teeth, a design sometimes adds a feature known as hunting tooth addition. This practice is called?
• In zerol gears, the axes of the shafts are described as which of the following?
• Which coupling uses rubber bushes to allow angular and axial displacement?
• Which polymer is formed from chloroprene of the monovinyl acetylene type?
• Which wires experience maximum stress when a wire rope passes around a sheave or drum?
• Which of the following is a common drilling machine for large workpieces that require stable mounting during drilling?
• Which screw thread is adaptable to split type nut?
• Which alloy is known for free machining and corrosion resistance equivalent to copper?
• The designer intends a fit that guarantees running clearance under all manufacturing conditions. Which fit type should be specified?
• Spiral gears are suitable for transmitting
• Reverted gear train is the gear train in which the first and last gear are on the same axis. Which option correctly describes this?
• Which welding process uses a non-consumable tungsten electrode and is shielded by a gas, usually argon or helium?
• Which workholding device is preferred in high-production turning operations involving accurately sized bar stock?
• After thousands of operating cycles, torque calculations for a plate clutch are normally based on the uniform wear assumption because:
• When the helical compression spring is subjected to axial compressive force, the type of stress induced in the spring wire is
• A cast-iron flywheel has reached its maximum allowable rim speed. If the rotational speed is increased further without changing its diameter, which failure is MOST likely to occur first?
• A four-bar chain consists of four rigid links connected by joints that are all turning pairs.
• In first-angle projection, the top view is placed
• Which type of key is Kennedy key another name for?
• The working temperature range for soldering process is:
• Tube mills are also known as agitator ball mills and are commonly used for wet grinding. Which mill type fits this description?
• Which hand tool is commonly used for cutting or twisting wire and chipping small parts, and is not used for tightening or loosening bolts and nuts?
• A packaging conveyor originally driven by V-belts will now operate in an environment continuously exposed to oil contamination. Which power transmission system is preferred?
• The addendum circle passes through the tips of the gear teeth.
• During fatigue analysis, which quantity expresses the relationship between the alternating stress and the mean stress?
• In a double-riveted lap joint subjected to eccentric loading, why are the outer rivets generally more highly stressed?
• If a bushing gear has no backlash, which of the following is a likely consequence?
• Constantan is composed primarily of copper and nickel.
• A maintenance engineer identifies a spring wire marked ASTM A232. Which material is being inspected?
• The path of contact in involute gears is which of the following?
• Chromium acts as a ferritic stabilizer.
• In a four-bar mechanism, the center of gravity of the coupler link would experience which type of acceleration?
• Plasticizers added to plastics primarily increase which property?
• PV rating is a design criterion for sleeve bearings; what two factors does PV represent?
• Clutch and coupling perform the same action.
• Which pairing of gases is commonly used as shielding gas in tungsten arc welding?
• What is the PRIMARY purpose of lockout/tagout before servicing a machine?
• A shaft drawing contains the notation R6 at the corner between two surfaces. This indicates
• In a cold riveting joint, which stress is most often the controlling factor for joint strength?
• What is the direction of the Coriolis component of acceleration in a slotted lever-crank mechanism?
• An imaginary circle passing through the points at which the teeth of the meshing gears contact each other.
• Which combination of methods provides the most accurate estimate of fundamental natural frequency for a shaft with multiple loads?
• In high-speed steel, which element is a main constituent along with chromium and vanadium?
• ________ is also known as tube mills and are commonly used for wet grinding.
• In designing a shaft, hub and key for a system, weakest member taken is
• Which ASTM specification corresponds to Chrome Vanadium Spring steel commonly used in fatigue-resistant applications?
• In an involute gear, the normal to the involute is tangent to which circle?
• Which drilling machine is specifically intended for machining large, heavy workpieces that cannot be conveniently repositioned during drilling?
• The term 'proof resilience' refers to the maximum strain energy that can be stored in a body before yielding.
• In machine elements, variable loading is best characterized as:
• Tubular gears are the gears used in which device to reverse rotation?
• For precision compression springs, which ASTM designation should be specified on the purchase order?
• Which group of wires experiences maximum stress when a wire rope passes around a drum?
• In a reverted gear train, the input and output shafts are coaxial.
• Before starting the brazing process, cleaning of parts is necessary to avoid which of the following?
• When a circular hole in a metal plate expands uniformly with temperature, how does the hole area change relative to the plate area?
• Which range is a typical speed for fabric belts?
• Under the ANSI system of orthographic projection, the right-side view is located relative to the front view where?
• Which device is used for transmitting energy in CNC machine tools?
• Which of the following will best describe sunk key?
• Which drilling machine is typically used for machining large, heavy workpieces that cannot be conveniently repositioned during operation?
• In screw thread terminology, what is meant by the pitch of a thread?
• Which of the following is NOT considered a governing failure mode in establishing the horsepower rating of a standard roller chain?
• A supplier mistakenly ships ASTM A229 spring wire instead of the specified material. Which material was delivered?
• Which property primarily determines the energy storage capacity of a flywheel under varying load?
• Kevlar epoxy composite is widely used in which sector?
• The example of a lower pair is
• A passenger vehicle braking system in which a rotor is squeezed from both sides by friction linings mounted in a housing is known as which brake type?
• In a concrete mixer, the bevel gears for rotating the drum are generally made by
• Rayleigh's method of computing the fundamental natural frequency is based on
• The angle at the base cylinder of an involute gear, that the tooth makes with the gear axis.
• When a specimen of low-carbon steel is loaded past its elastic range, what behavior is expected after the load is removed?
• Thread stripping in a nut is most likely when:
• In ductile materials notch or stress raiser is less harmful because
• What is the mobility of a statically indeterminate structure?
• Which element is an austenitic stabilizer?
• A mechanic receives a bearing designated 6312. Which feature is identified by the digit '3' in the bearing designation?
• In column stability analysis, which factor has the most significant influence on the shape assumed by a column when it buckles under compressive loading?
• When the hole is smaller than the shaft, the allowance is said to be negative and is termed.
• In metalworking, which workshop is dedicated to fabricating mechanical units by cutting and assembling metal parts?
• Beach marks on a fracture surface are characteristic of which type of failure?
• A machinist receives a drawing specifying Ø40 H7/g6. This designation primarily defines the
• Which coupling is most suitable for transmitting power between two perfectly aligned shafts while requiring easy dismantling for maintenance?
• In damped free vibration, what happens to the amplitude over time?
• When two bevel gears having equal teeth and equal pitch angle are used to transmit power between shafts that intersect at right angle, they are called
• A thin film bearing is a bearing
• Which process is used to refine bauxite to alumina in aluminum production?
• If two shafts are neither parallel nor intersecting, power can be transmitted by using spiral gears.
• 18/8 stainless steel contains which combination?
• In a single slider four-bar linkage when the slider is fixed, it forms a mechanism of
• A four-bar chain has
• Which method is based on energy conservation to estimate fundamental frequency?
• Which alloy is known for low creep rate, is age-hardenable, non-magnetic, oxidation resistant, and maintains high strength at elevated temperatures?
• Which coupling is commonly selected when the shafts are collinear, permanently aligned, and ease of manufacturing is more important than ease of dismantling?
• In a double-riveted lap joint under eccentric loading, outer rivets are generally more highly stressed because they
• Wahl factor must be considered to account for
• In a belt drive, the pulley acts as which type of kinematic pair?
• Fatigue failure most commonly results from:
• In a kinematic chain, replacing a quaternary joint with an equivalent arrangement involves how many binary joints?
• A key capable of tilting in a recess milled out in a shaft is known as?
• Which law governs the condition for continuous rotation in a planar four-bar linkage?
• To obviate axial thrust, which gear arrangement is used?
• In the detailed design of rim thickness and depth of bead, the assumed circular pitch (PC) value is which of the following?
• For a planar four-bar linkage, the sum of the shortest and longest lengths cannot be greater than the sum of the remaining two link lengths if there is to be a continuous relative rotation between two members." How do you call the preceding statement?
• What's no. 5 in Mohs Hardness Scale?
• Which machining operation is primarily intended to improve the dimensional accuracy and surface finish of an existing drilled hole?
• In the Lewis equation, a gear tooth is considered as which type of beam?
• It is a device that opposes motion and dissipates energy. An example of which is automobile shock absorber.
• Which mineral corresponds to a Mohs hardness of about 2?
• Which component is used to transmit energy in CNC machine tools, providing precise linear motion?
• Which cast iron consists of carbon in rosette form?
• Most of the non-recycled aluminum produced today is produced electrochemically. What do you call this process?
• What factor quantifies the stress amplification at a geometric discontinuity?
• Electrical conductor grade aluminum consists of approximately what percent of aluminum?
• Which statement about arc temperatures matches the provided data?
• A drafter draws equally spaced thin lines inside a cut surface. These lines are called
• Which key is commonly used on machine tool spindles because it permits axial movement of the hub without interrupting power transmission?
• The bearing characteristic number in a hydrodynamic bearing depends upon
• The design calculations for members subject to fluctuating loads with the same factor of safety yield the most conservative estimates when using
• Which screw thread is adaptable to split type nut?
• Which coupling provides elasticity to absorb shock and accommodate shaft deflection?
• A flat-faced follower operates against a cam whose profile is an eccentric circle. As the eccentricity increases, what happens to the follower displacement?
• Backlash is the difference between which features? (measured on the pitch circle)
• Which method is widely recognized for reducing alternating stress in bolted tension connections?
• An engineer selects ASTM A401 for manufacturing a heavy-duty valve spring. What spring material does this ASTM code represent?
• A milling operation that machines two opposite sides of a workpiece at the same time is called?
• Plastics are:
• Which of the following consists of a number of parallel strands of fiber, the strands are side by side (not interwoven or twisted together), forming a flat ribbon?
• Which property of a clutch friction material is most important for reliable engagement under load?
• A shaft revolving in a bearing is an example of which type of kinematic pair?
• If both the maximum and minimum stresses remain tensile throughout a loading cycle but are of different magnitudes, the stress condition is known as:
• For a flat-faced follower against a cam, increasing eccentricity primarily affects the follower's
• Which phenomenon causes slight cyclic variation in the speed of the driven sprocket of a roller chain transmission?
• What is a unique form of cast iron with worm shaped graphite particles?
• A flange coupling is designed assuming that the key, bolts, and shaft all have equal factors of safety. If the bolts are upgraded to a material with significantly higher shear strength while all other dimensions remain unchanged, which component becomes the critical element?
• Which physical phenomenon allows both friction clutches and friction brakes to transmit or absorb torque?
• The base helix angle is the angle the tooth makes with the gear axis at the base cylinder. This term is called?
• The shape of cantilever for uniformly distributed load will be:
• Which of the following type of fastener has a trilobe thread structure?
• Which statement best describes the electrical and thermal conductivity of plastics?
• If the rim speed doubles, the centrifugal tensile stress increases by what factor?
• In bolt design, the quotient of the proof load and the tensile-stress area is called
• Which follower motion type will produce the least jerk to the system?
• What will be the effect in bushing gears without backlash?
• An axle is a machine part that is subjected to
• Which mechanism is an inversion of the double slider-crank chain?
• The normal to the involute is tangent to which circle?
• Which welding process uses a non-consumable tungsten electrode with inert gas shielding?
• Which mineral has Mohs hardness of 5?
• In a gear train, the train value is the reciprocal of the speed ratio.
• Which thread form is used for the lead screw of a lathe?
• On the motors with low starting torque, the type of the clutch to be used is
• Before modern non-asbestos materials became common, asbestos was widely selected for brake linings primarily because it possessed:
• Which term describes a material whose properties are identical in all directions?
• Which factor primarily determines the suitability of a plain washer under a bolt head?
• In buckling load for a given material depends on
• Effective stress in wire ropes during normal working is equal to the stress due to
• Which operation is used to enlarge a drilled hole to the exact size and improve its finish, without significantly altering the hole location?
• Rolling contact bearings as compared to sliding contact bearings have which of the following characteristics?
• Which of the following is recovered by the simple process of heating highly crushed ore?
• Backlash in spur gears is the difference between which two features measured on the pitch circle?
• The designation Ø40 H7/g6 indicates the relationship between which two parts?
• Which of the following is not a correct procedure to increase the fatigue limit?
• Which hardness test uses indentation depth to determine a hardness value, often yielding a single numeric scale?
• What is the axially located rectangular groove in a hub and shaft called?
• The train value of gear train is _____________.
• Which shape of steel key is usually strongest in shear and crushing?
• Which hardness test is based on measuring the depth of indentation to determine hardness?
• Which coupling is best for easy dismantling when shafts are perfectly aligned?
• Which of the following types of gear is free from interference?
• According to Petroff's equation for lightly loaded journal bearings, the coefficient of friction between the journal and the bearing is directly proportional to which factor?
• In belt-drive terminology, the angle subtended by the belt while in contact with the pulley is known as the
• Which brake arrangement is described by a caliper that squeezes a rotor from both sides?
• If both sprockets of a chain drive are replaced with sprockets having twice as many teeth while maintaining the same pitch and speed ratio, the chain velocity will
• What is the primary effect of stress concentration in a machine member?
• For spur gears used in machine tool gearboxes, the minimum contact ratio should be more than which value?
• Tubular gears are the gears used in which device to reverse rotation?
• Which mechanism produces intermittent rotary motion from continuous rotary motion?
• Which mechanism is typically used to connect two shafts with misalignment, known as Oldham's coupling?
• In steels that have been deoxidized with aluminum, no grain growth occurs until the ________ is reached, which is well above the critical temperature.
• A newly installed clutch slips only under heavy acceleration, although the release mechanism is properly adjusted. Which condition should be investigated first?
• What is the other name for Kennedy key?
• Under normal service conditions, a screw fastener is designed to carry which type of loading?
• If numerous shallow pits are observed on the raceways of a bearing after several thousand hours of service, the damage is most likely caused by which of the following?
• The gear tooth Vernier is used to measure which of the following?
• In a solid circular shaft under torsion, doubling the diameter while keeping torque constant will cause the maximum shear stress to
• Which element is a ferritic stabilizer?
• In a four-bar chain, how many turning pairs are present?
• Which sunk key made the form of a segment of a circular disc of uniform thickness, known as?
• Power screws used for transmitting power should have which characteristic?
• Two bevel gears with equal teeth and equal pitch angle used to transmit power between shafts that intersect at right angle are called
• Gear used to transmit power at high velocity ratios between non-intersecting shafts that are usually but not necessarily at right angle.
• Which statement correctly describes 18/8 stainless steel composition?
• Stress concentration in cyclic loading is more serious in which type of material?
• For shafts, the shear due to bending is a maximum at the neutral plane where the normal stress is:
• Path of contact in involute gears is which of the following?
• What factor is most important to prevent loosening of a fastener under vibration?
• In aluminum-deoxidized steels, the coarsening temperature is reached well above the critical temperature. Which term represents this temperature?
• In a shaft, a key capable of tilting in a recess milled out in a shaft is known as?
• Which one of the following is a positive clutch?
• Which type of pliers is designed for cutting wires and holding flat round stock?
• Increasing the stiffness of springs in a centrifugal clutch affects engagement speed how?
• In flange coupling design, which element becomes critical if bolts are upgraded to significantly higher strength?
• In hydrodynamic lubrication between a journal and bearing, which condition is essential for film formation?
• Compared with threaded fasteners, what is the primary advantage of a riveted joint?
• A thin plate with a circular hole is heated uniformly. If the coefficient of linear expansion governs the material, the hole area will:
• Which factor is NOT typically considered when determining the horsepower rating for a standard roller chain?
• Which of the following is an example of accelerated strain aging in steel?
• Which of the following is the ratio of the fatigue strength without a stress concentration to the fatigue stress with a stress concentration?
• Surface endurance limit of gear material is dependent on its Brinell hardness number.
• If the controlling force line for a spring-controlled governor intersects the y-axis at the origin, the governor is said to be
• Which screw thread is stronger than other threads?
• Which of the following couplings can accommodate both angular and axial shaft displacement through the deformation of rubber bushes?
• Under axial load, each section of a close-coiled helical spring is subjected to
• Straddle milling is an operation that machines which of the following?
• Autofrettage is a method of
• A member is subjected to a loading cycle where the stress varies from zero to a maximum tensile value before returning to zero. This loading is classified as:
• A centrifugal clutch's engagement speed is affected by spring stiffness. What is the effect when stiffness increases?
• Which key relies primarily on friction rather than shear to transmit torque?
• The maximum-strain theory which applies only in the elastic range of stresses is also known as which theory?
• From design point of view, spherical pressure vessels are preferred over cylindrical pressure vessels because
• Which statement correctly distinguishes clutch from coupling?
• When a cutting fluid leaks near a lathe, what should be done first?
• Borax is applied to parts to be brazed in order to:
• Holding power of a sunk key is due to resistance, which it offers in
• Which clutch transmits power through positive engagement of interlocking members rather than relying on friction?
• Which of the following is a unique form of cast iron with worm-shaped graphite particles?
• These clutches produce positive coupling between the two shafts, regardless of direction of rotation.
• A steel shaft rotates freely inside a bronze bushing with adequate lubrication clearance. Which class of fit is most appropriate?
• Shaft revolving in a bearing is the following type of pair
• Which statement best explains the uniform wear assumption in plate clutch torque calculations?
• A flange coupling is transmitting torque through fitted bolts. Which assumption is generally adopted in its design?
• During gear hobbing, which motion is synchronized with the hob's rotation to create the correct tooth profile?
• An offset provided in radial cam-translating-follower mechanism serves to:
• Which type of coupling is most appropriate for connecting two shafts having a small amount of parallel and angular misalignment while transmitting moderate torque?
• An offset in radial cam translating follower mechanism serves to decrease pressure angle during ascent. Which option expresses this correctly?
• For hydrodynamic lubrication
• In a kinematic chain, a quaternary joint is equivalent to how many binary joints?
• Which alloy is best known for resistance to sulfuric acid in concentrated solutions at elevated temperatures?
• Which property is most directly related to the surface endurance limit of a gear material?
• A workshop where metal parts are cut to size and assembled into machines is called what?
• The primary purpose of lockout/tagout before servicing equipment is to prevent accidental energization.
• Which form of fiber is composed of a number of parallel strands side by side, forming a flat ribbon?
• In flange coupling, torque is carried by bolts via which mechanism?
• Why are plain washers commonly installed beneath the head of a bolt or nut?
• Constantan is an alloy of copper and nickel.
• The curves that satisfy the fundamental law of gearing are:
• How are gears for watches generally manufactured?
• In a multiple V-belt drive under identical loading, if one belt fails first, what is the most probable cause?
• If the effective driving tension remains constant while the belt velocity is doubled, the power transmitted becomes?
• A bearing is designated by the number 410. It means that it is a bearing of which type?
• In a beam of rectangular cross-section, how does the maximum shear stress compare to the average shear stress?
• Which material does ASTM A229 correspond to?
• Which material designation designates Music Wire?
• Spring driven watches and clocks utilize
• A feather key is usually
• What is the primary purpose of performing a ring test on a vitrified grinding wheel before installation?
• Mechanical impact devices that accept material smaller than approximately 4 inches.
• In order to prevent the brake arm from grabbing, the moment of friction force about the brake arm pivot should be
• Which gear type is typically used to reduce noise in transmissions?
• When evaluating torque capacity of friction clutches that have been in service for an extended period, which design assumption is typically used?
• Which of the following couplings is specifically intended to permit axial assembly without requiring either shaft to move longitudinally?
• Which form of copper is recovered by heating highly crushed ore?
• What is the recommended speed for fabric belts?
• Which mineral is number 5 on the Mohs scale of hardness?
• The tensile stress produced in the rim of a flywheel due solely to centrifugal force is directly proportional to which quantity?
• For evenly distributed and uniform wear on each meshing gear tooth, the ideal design practice is to consider a:
• In welding, weld spelter means:
• Which type of gear is used when shaft axes are offset from each other?
• Which coupling permits axial assembly without moving either shaft longitudinally?
• Which type of gears is used for noiseless operation?
• When the velocity ratio is high and space is limited, which gear should be used?
• Which heat-treatment medium is typically used for AISI O-series tool steels?
• For a cone clutch, what is the commonly used angle between the friction lining and the axis?
• Which welding process is described as welding by local fusion with or without filler and was developed later, used in WWI ships?
• Is an acceleration parameter (with units of gravities) that depends on the natural frequency and the change in velocity, due to shock.
• When a column is subjected to an eccentric load, the induced stress in the column is due to which components?
• Who postulated the maximum distortion energy theory?
• In a belt drive where belts share load unevenly, what is the most likely consequence?
• If two intersecting shafts transmit rotary motion and the angle between them varies during operation, which coupling is appropriate?
• Nickel acts as an austenitic stabilizer, stabilizing which phase?
• In the designation Ø40 H7/g6, which aspect does the 'H7' represent?
• Which mineral corresponds to Mohs hardness No. 5?
• The overload condition that occurs near large concentrated loads is called which phenomenon?
• Which ASTM code designates Chrome Vanadium?
• Flux is used in soldering to:
• Degrees of polymerization for commercial plastics are usually less than:
• The main function of an automobile gearbox is
• Which gear is used to transmit motion with high smoothness and reduced vibration?
• Davis steering gear consists of which type of pairs?
• In a four-bar mechanism, the center of gravity of the coupler link experiences what accelerations during motion?
• Which mechanism represents an inversion of a single slider-crank chain?
• Which key is generally preferred when ease of manufacturing is the primary consideration for a rigid shaft-hub connection?
• In belt drives, "slip" refers to
• The thickness of a gear tooth is measured
• Which designation corresponds to Music Wire?
• Two shafts, solid and hollow, same material and weight having same length subjected to equal torsional force. What is the torsional stiffness of hollow shaft?
• Which line type is used to extend dimensions on a drawing beyond the object?
• In the buckling design of a screw jack, end conditions are typically assumed as which of the following?
• If both sprockets have twice as many teeth while maintaining the same pitch and speed ratio, the chain velocity will
• Which alloy is best described as a nickel-based superalloy designed for high-temperature strength in aerospace applications?
• The accurate method of finding the natural frequency of transverse vibrations of a system of several loads attached to some shaft is
• Which nickel alloy designation corresponds to an age-hardenable wrought nickel alloy described in the material?
• In a beam of circular cross-section, the maximum shear stress relative to the average is how much higher?
• Spelter refers to which metal when used as brazing filler metal?
• For motors with low starting torque, which clutch type should be used?
• To keep maximum shear stress the same when shaft speed is doubled while transmitting the same power, the new diameter should be
• Compared with spur gears, helical gears tend to run:
• Which type of vibration is associated with a gradual reduction in amplitude due to frictional or resistive forces?
• The gear train in which the first and last gear are on the same axis is known as which type?
• In an oil-lubricated journal bearing, coefficient of friction between the journal and the bearing
• Which statement about pitch circle diameter of an involute gear is true?
• Stress concentration in a machine component of ductile materials not so harmful as it is in brittle material because
• Which machine tool uses a single-point cutting tool in a reciprocating motion to produce flat surfaces?
• During an over-speed condition, which component of a cast-iron flywheel is most prone to failure first?
• A single crystal grown by vapor deposition is commonly referred to as what?
• In a slider-crank mechanism, the maximum acceleration of the slider occurs when the crank is at which position?
• The friction material of the clutch should have
• Which of the following is an effective method of reducing the alternating stress in bolted tension connections?
• Rolling without slipping describes the contact condition between a belt and pulley in a belt drive. Which of the following best expresses this?
• Which one of the following causes whirling of shafts?
• What does CGI stand for in cast iron materials?
• The whole depth for a pair of gears is given by
• The property where mechanical properties are the same in a particular direction at every point is known as
• A mechanical press experiences highly fluctuating torque during every working stroke. Which flywheel property primarily allows it to smooth the speed variation?
• Which design modification most effectively increases the energy storage capacity of a flywheel without increasing its rotational speed?
• Rectangular bar in a rectangular hole is an example of which type of kinematic pair?
• In zerol gears, the axes of shafts are
• In a simple gear train with an odd number of idler gears, the driven gear direction is
• Static force on a gear tooth is due to which of the following?
• Which key is generally NOT recommended for transmitting heavy torque because no keyway is cut into the shaft?
• If some links are connected such that motion between them can take place in more than one direction, this motion is called
• Constantan is used in thermocouples due to its high electrical resistance.
• When meshed with a gear, it is used to change rotary motion to reciprocating motion.
• Which type of gear will be used to have minimum axial thrust?
• Modern flywheel energy storage systems frequently operate in a vacuum chamber primarily to
• The clearance between the tooth profiles of a gear tooth.
• Which gear type is described as interference-free?
• The maximum strain energy that can be stored in a body is known as
• Which of the following keys is preferred for transmitting a large amount of impact-type torque in both directions?
• A coupling used for absorbing some shock and vibration that may appear on one shaft and of preventing the occurrence of reversed stresses caused by the shaft deflecting at the coupling preventing at the coupling.
• The loading pattern that starts at zero, rises to a maximum, then returns to zero is best described as
• For collinear shafts with easy manufacturing prioritized over dismantling ease, which coupling is commonly used?
• Which power transmission method is most suitable in an environment with oil contamination?
• Which machining operation is used to create a flat seating surface around a hole to support fasteners?
• Which property can be calculated indirectly using the density and speed of sound in a material?
• Which clutch type transmits power through positive engagement of interlocking members rather than relying on friction?
• Reducing the pressure angle on gears results in which of the following?
• Effective stress in wire ropes during normal working is equal to the stress due to
• Which ASTM code designates Chrome Silicon?
• Nodular cast iron contains graphite in what form?
• Which motion conversion is used by a lawn-sprinkler which is a four-bar mechanism?
• In roller chain lubrication, which method uses a circulating pump to supply a continuous flow of oil inside the chain loop across the width and directly at the slack strand?
• Which engineering material is most capable of sustaining large plastic deformation before fracture?
• The gear box in automobiles is placed between which components?
• In a drawing, the notation R6 at the corner between two surfaces indicates what?
• A sleeve bearing is required to operate without continuous lubrication in a light-duty conveyor. Which design parameter should be checked FIRST before approving this application?
• Wire rope is typically used in applications with which combination of speed and tension?
• Which AISI tool steel is hardened in oil and has a low tendency to shrink or warp during heat treatment?
• The wires in a wire rope are subjected to which stresses?
• Which key is commonly used on machine tool spindles because it permits axial movement of the hub without interrupting power transmission?
• Which statement about screw thread terms is correct for a single-start thread?
• Lowering the pressure angle on gears affects tooth strength in which way?
• Non-metallic gears have which combination of noise and load carrying capacity?
• A tapered key which fits in a key-way in the hub and is flat on the shaft is known as?
• Which manufacturing method is used for high-volume, net-shaped gear production?
• The section of a beam that is most critical for design purposes and lies near the location where the bending moment attains its greatest value is referred to as the
• For the same transmitted torque and bolt diameter, increasing the bolt pitch-circle diameter of a flange coupling will:
• For machinery shafts, the permissible deflection is approximately what value?
• The commonly used angle between leather or asbestos friction lining surface and axis of cone clutch for a cone clutch is
• Concentric springs are used to achieve greater load carrying capacity with given space, provide fail-safe operation, and eliminate surge.
• In GTAW, shielding gas is typically argon or helium.
• Ackermann steering gear consists of which type of pairs?
• A tapered key which fits in a key-way in the hub and is flat on the shaft, is known as?
• Which type of pliers is used for cutting wires and holding flat round stock?
• Pitch circle diameter of an involute gear is dependent on which parameter?
• Which factor is defined as the ratio of the maximum stress at a discontinuity to the calculated nominal stress?
• Which key relies primarily on friction rather than shear to transmit torque?
• Operating a flywheel in a vacuum chamber primarily reduces windage losses.
• In automobiles, the gear box is placed between which two components?
• Which brake shoe develops a self-energizing action because the friction force tends to draw the shoe more tightly into the rotating drum?
• Degrees of polymerization for commercial plastics are usually less than:
• A tool bit for cutting an American National thread should be ground with an angle of:
• A key that transmits power through frictional resistance only is
• Which line convention is used to represent features that cannot be seen directly in the current viewing direction?
• One of the three basic filing methods performed by grasping the file at the end and drawing across the workpiece is called what?
• Which machine tool produces flat surfaces by means of the reciprocating motion of a single-point cutting tool?
• In arc welding, the temperature of the arc is:
• In a simple gear train, if the number of idler gears is odd, the direction of motion of the driven gear will be the same as the driving gear.
• Elastic nut is a locking device in which
• In gear hobbing, which motion is synchronized with the rotation of the hob to generate the correct tooth profile?
• A surface texture symbol is modified by adding a small circle to the basic symbol. What does this indicate?
• For transmitting power, a simple gear train consisting of 11 gears is used. Then the driver and driven shafts will be rotating in
• Which of the following is the most effective design change to reduce fatigue failure due to stress concentration?
• Spur gears used in machine tool gearboxes must have a contact ratio greater than 1.4.
• Which line type is used to denote features not visible in the current view?
• Which screw thread is used for transmitting force in one direction?
• Which key is generally NOT recommended for transmitting heavy torque because no keyway is cut into the shaft?
• Which type of loading is most associated with fatigue failure due to cycles?
• The capacity of a material to absorb energy during elastic deformation and recover that energy upon unloading is called what?
• In most of internal combustion engines, crankshaft bearings is
• Which key is formed as a circular disc segment of uniform thickness?
• In assembly practice, which joint type is generally not intended to be disassembled without damaging the components?
• Which of the following is the major alloying element of Invar?
• Which value is the maximum typical degree of polymerization for commercial plastics?
• Permissible bending stress for a gear tooth is usually taken as which of the following?
• The sum of addendum and dedendum equals the whole depth.
• After an overloading that exceeds the elastic limit and subsequent unloading, the steel specimen behaves as:
• In belt drives, slip refers to
• Which alloy contains 40% to 60% copper with the remainder nickel and is used in thermocouples?