Description : Axial length of an unloaded helical compression spring is called (A) compressed length (B) solid length (C) free length (D) none of the above
Last Answer : (C) free length
Description : Axial length of the spring which is so compressed that the adjacent coils touch each other. (A) compressed length (B) solid length (C) free length (D) none of the above
Last Answer : (B) solid length
Description : If the spring is compressed completely and the adjacent coils touch each other,the the length of spring is called as? a) Solid length b) Compressed length c) Free length d) None of the mentioned
Last Answer : a) Solid length
Description : When two concentric springs are made of same material, having same free length and compressed equally by axial load, then the load shared by each spring is proportional to (A) Spring index of each spring ... spring (C) Mean coil diameter of each spring (D) Square of wire diameter of each spring
Last Answer : (D) Square of wire diameter of each spring
Description : Solid shaft is costlier than hollow shaft of same weight. a) True b) False
Last Answer : b) False
Description : The strength of hollow shaft is more than the strength of solid shaft of same weight. a) True b) False
Last Answer : a) True
Description : The stiffness of solid shaft is more than the stiffness of hollow shaft with same weight. a) True b) False
Description : The hub is treated as a solid shaft while calculating torsional shear stress in the hub. a) True b) False
Description : Solid shafts are used in epicyclic gearboxes. a) True b) False
Description : Jam nut is a locking device in which (A) A smaller nut is tightened against main nut creating friction at the contacting surface (B) A split pin is passed through diametrically opposite slots in nut and ... parts of nut separated by slot (D) An elastic piece is tightened in the nut by a setscrew
Last Answer : (A) A smaller nut is tightened against main nut creating friction at the contacting surface
Description : Castle nut is a locking device in which (A) A smaller nut is tightened against main nut creating friction at the contacting surface (B) A split pin is passed through diametrically opposite slots in nut and ... of nut separated by slot (D) An elastic piece is tightened in the nut by a setscrew
Last Answer : (B) A split pin is passed through diametrically opposite slots in nut and a hole in bolt and the two ends of split pin are separated and bent back on nut
Description : Needles bearing consist of rollers of small diameter and very small length. (a) True (b) False
Last Answer : (b) False
Description : Needles bearing consist of rollers of small diameter and very small length. a) True b) False
Description : Nipping is defined as leaving the gap between full length leaf and graduated length leaf. a) True b) False
Description : Nip is the initial gap between extra full length leaf and the graduated length leaf before the assembly. a) True b) False
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 : A clearance bearing is design accurately to keep the radius of journal and bearing equal. a) Journal radius is kept larger b) Journal radius is kept smaller c) True d) Can’t be determined
Last Answer : b) Journal radius is kept smaller
Description : The strength of a welded joint with respect to a riveted joint is a. Greater b. Smaller c. Equal d. None
Last Answer : a. Greater
Description : Efficiency of a welded joint with respect to a riveted joint is a. Smaller b. Equal c. Greater
Last Answer : c. Greater
Description : For the majority of bearings, actual life is considerably greater than rated life. (a) True (b) False
Last Answer : (a) True
Description : A cylinder roller creates lesser noise than a deep groove ball bearing. (a) True (b) False
Description : If fluid film pressure is high and surface rigidity is low than mode of lubrication is called as elastohydrodynamic lubrication. a) True b) False
Description : For majority of bearings, actual life is considerably greater than rated life. a) True b) False
Description : Cylinder roller creates lesser noise than deep groove ball bearing. a) True b) False
Description : Strength of parallel fillet weld is greater than strength of transverse fillet weld. a) True b) False
Description : Thickness of plate is required more in welding than in riveting. a) True b) False
Description : Cold riveting holds the connected parts better than hot riveting. a) True b) False
Description : The static load carrying capacity of fine threads is greater than that of coarse threads. a) True b) False
Description : Saddle key is more suitable than sunk key for heavy duty applications. a) True b) False
Description : In manual assembly, cost of screw is higher than the cost of driving a screw. a) True b) False
Description : Keyed joints never lead to stress concentration on shafts. a) True b) False
Description : Feather key can be used to prevent axial motion between two elements. a) True b) False
Description : The operation of flywheel is continuous. a) True b) False
Description : Flywheel and governor can be interchanged. a) True b) False
Description : Flywheels are used in punching and shear operation. a) True b) False
Description : Is use of a flywheel recommended when a large motor is required only for a small instant of time? a) True b) False
Description : The dynamic load-carrying capacity of a bearing is defined as the radial load in radial bearings that can be carried for a minimum life of 1000 revolutions. (a) True (b) False
Description : The life of an individual ball bearing is the time period for which it works without any signs of failures. (a) True (b) False
Description : Stribeck equation gives the dynamic load capacity of the bearing. (a) True (b) False
Description : A total permanent deformation of 0.0001 of the ball diameter is taken for considering the static load capacity of the sh (a) True (b) False
Description : Angular contact bearing can take thrust as well as radial loads. (a) True (b) False
Description : Cylindrical roller bearing has a lower load capacity as compared to deep groove ball bearing. (a) True (b) False