Description : The purpose of lubrication in an antifriction bearing is (a) to reduce the friction between balls and races (b) dissipation of frictional heat prevention of corrosion (c) protection of the bearing from dirt and other foreign particles (d) all of the mentioned
Last Answer : (d) all of the mentioned
Description : Which bearing is Antifriction bearing A. Thick lubrication bearing B. Thin lubrication bearing C. Rolling or ball bearing D. None
Last Answer : C. Rolling or ball bearing
Description : Rolling contact bearing is also called as A. Plastic bearing B. Thin lubrication bearing C. Thick lubrication bearing D. Antifriction bearing.
Last Answer : D. Antifriction bearing.
Description : The rolling contact bearings are known as (a) thick lubricated bearings (b) plastic bearings (c) thin lubricated bearings (d) antifriction bearings
Last Answer : (d) antifriction bearings
Description : The listed life of a rolling bearing, in a catalog is the, (a) minimum expected life (b) maximum expected life (c) average life (d) none of the mentioned
Last Answer : (a) minimum expected life
Description : Which of the following is an antifriction bearing? (a) journal bearing (b) collar bearing (c) needle bearing (d) pivot bearing
Last Answer : (c) needle bearing
Description : _______is suitable as a lubricant for heavy-duty applications of rolling contact bearing. (a) Grease (b) Lubricating oil (c) Graphite (d) Air
Last Answer : (b) Lubricating oil
Description : ________is suitable as a lubricant for low and moderate loads applications of rolling contact bearing. (a) Grease (b) Lubricating oil (c) Graphite (d) Air
Last Answer : (a) Grease
Description : Which one of the following parts of a ball bearing acts as a barrier between the balls preventing them from bumping into each other? (a) Inner race (b) Outer race (c) Rolling element (d) Cage
Last Answer : (d) Cage
Description : Which one of the following parts of a ball bearing is mounted to the housing and is stationary? (a) Inner race (b) Outer race (c) Rolling element (d) Cage
Last Answer : (b) Outer race
Description : Which one of the following parts of a ball bearing is mounted on the rotating shafts and tends to rotate the shaft? (a) Inner race (b) Outer race (c) Rolling element (d) Cage
Last Answer : (a) Inner race
Description : A rolling contact bearing is specified as X307. Calculate the bearing diameter. (a) 35 mm (b) 28 mm (c) 21 mm (d) 7 mm
Last Answer : (a) 35 mm
Description : A journal bearing is a ______ contact bearing working on the hydrodynamic lubrication and which supports load in____ direction. a) Sliding, Axial b) Rolling, Radial c) Sliding, Radial d) Rolling, Axial
Last Answer : c) Sliding, Radial
Description : A rolling contact bearing is specified as X307. Determine the series. a) Extra light series b) Light series c) Medium series d) Heavy series
Last Answer : c) Medium series
Description : Antifriction bearings are (a) thick lubricated bearings (b) plastic bearings (c) ball and roller bearings (d) thin lubricated bearings
Last Answer : (c) ball and roller bearings
Description : Antifriction bearings are (a) sleeve bearings (b) hydrodynamic bearings (c) thin lubricated bearings (d) none of the mentioned
Last Answer : (d) none of the mentioned
Description : The antifriction bearings (a) have low starting and low running friction at moderate speeds (b) have a high initial cost (c) can carry both radial and thrust loads (d) all the mentioned
Last Answer : (d) all the mentioned
Description : Antifriction bearings are A. Sleeve bearings B. Hydrodynamic bearings C. Thin lubricated bearings D. None of the above
Last Answer : D. None of the above
Description : Which one of the following types of bearings is employed in shafts of gearboxes of automobiles? [IES-1999] (a) Hydrodynamic journal bearings (b) Multi-lobed journal bearings (c) Antifriction bearings (d) Hybrid journal bearings
Last Answer : (c) Antifriction bearings
Description : Which one of the following pair is correctly matched? [IES-2000] (a) Beauchamp tower ........................First experiments on journal bearings (b) Osborne Reynolds ........................ ... .Pivot and Collar bearings (d) Ball bearings...............................Hydrodynamic lubrication
Last Answer : (a) Beauchamp tower ........................First experiments on journal bearings
Description : Which of the following cannot tolerate misalignment? (a) Angular contact bearing (b) Cylinder roller bearing (c) Thrust ball bearings (d) All of the listed
Last Answer : (d) All of the listed
Description : Footstep bearing is an axial load bearing. a) True b) Thrust load c) Shear load d) None of the listed
Last Answer : b) Thrust load
Description : Static load is defined as the load acting on the bearing when shaft is _____ a) Stationary b) Rotating at rpm
Last Answer : a) Stationary
Description : Which of the following cannot tolerate misalignment? a) Angular contact bearing b) Cylinder roller bearing c) Thrust ball bearings d) All of the listed
Last Answer : d) All of the listed
Description : Which of the following cannot take radial load? a) Cylindrical Roller bearing b) Taper roller bearing c) Thrust ball bearing d) None of the listed
Last Answer : c) Thrust ball bearing
Description : ______ is used for a shaft that supports rotating elements like wheels, drums or rope sleaves. a) Spindle b) Axle c) Shaf d) None of the listed
Last Answer : a) Spindle
Description : The construction feature which makes tapered roller bearings unique in that races are (a) attachable (b) separable (c) self-aligning (d) none of the mentioned
Last Answer : (b) separable
Description : Balls and the races of the deep groove ball may roll freely without any sliding. a) True b) False
Last Answer : a) True
Description : Babbitt lining is used on brass/bronze bearings to increase the (A) Antifriction properties (B) Compressive strength (C) Bearing resistance
Last Answer : Option D
Description : The rolling contact bearings as compared to sliding contact bearings have (a) small overall dimensions (b) accuracy of shaft alignment (c) low starting and low running friction except at very high speeds (d) all the mentioned
Description : Taper rolling supports a) Axial loads b) Thrust loads c) Both axial and thrust loads d) None of the mentioned
Last Answer : c) Both axial and thrust loads
Description : . In gear boxes and small size motors, rolling contact bearings are used. a) True b) False
Description : In steam and gas turbines, rolling contact bearings are used. a) True b) False
Last Answer : b) False
Description : Hot rolling produces a stronger shaft then cold rolling. a) True b) False
Description : The ability of a material to be formed by hammering or rolling is known as _________ a) Malleability b) Ductility c) Harness d) Brittleness
Last Answer : a) Malleability
Description : Which of the following are functions of flywheel? a) Store and release energy during work cycle b) Reduce power capacity of the electric motor c) Reduce amplitude of speed fluctuations d) All of the listed
Description : In the expression of dynamic load capacity P=XVF(r) + YF(a), V stands for ? a) Race rotation factor b) Radial factor c) Thrust factor d) None of the listed
Last Answer : a) Race rotation factor
Description : Which of the following is expression for stribeck equation?(Number of balls=z)? a) C=kd2z/5 b) C=kd2z/15 c) C=kd2z/10 d) None of the listed
Last Answer : a) C=kd2z/5
Description : Which of the following are functions of bearings? a) Ensure free rotation of shaft with minimum friction b) Holding shaft in a correct position c) Transmit the force of the shaft to the frame d) All of the listed
Description : The strain energy stored in a spiral spring is given by? a) 12M2L/Ebtɜ b) 6M2L/Ebtɜ c) 8M2L/Ebtɜ d) None of the listed
Last Answer : b) 6M2L/Ebtɜ
Description : Propagation of fatigue failure is always due to compressive stresses. a) Due to bending b) Due to tensile c) Due to fatigue d) None of the listed
Last Answer : b) Due to tensile
Description : When two Belleville sprigs are arranged in series, half deflection is obtained for same force. a) One fourth deflection b) Double deflection c) Four time deflection d) None of the listed
Last Answer : b) Double deflection
Description : Angle of rotation o arbour with respect to drum is given by? a) None of the listed b) 12ML/Ebtɜ c) 8 ML/Ebtɜ d) 16ML/Ebtɜ
Last Answer : b) 12ML/Ebtɜ
Description : What will happen if stresses induced due to surge in the spring exceeds the endurance limit stress of the spring. a) Fatigue Failure b) Fracture c) None of the listed d) Nipping
Last Answer : a) Fatigue Failure
Description : Pitch of coil is defined as axial distance in compressed state of the coil. a) Yes b) It is measured in uncompressed state c) It is same in uncompressed or compressed state d) None of the listed
Last Answer : b) It is measured in uncompressed state
Description : If number of coils are 8 and wire diameter of spring 3mm, then solid length is given by? a) None of the listed b) 27mm c) 24mm d) 21mm
Last Answer : c) 24mm
Description : The longest leaf in a leaf spring is called centre leaf. a) It is called middle leaf b) It is called master leaf c) Yes d) None of the listed
Last Answer : b) It is called master leaf
Description : The helix angle is very small about 20. The spring is open coiled spring. a) Yes b) It is closed coiled spring c) That small angle isn’t possible d) None of the listed
Last Answer : b) It is closed coiled spring