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 : 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 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
Last Answer : d) All of the listed
Description : While designing shaft on the basis of torsional rigidity, angle of twist is given by? a) Ml/Gd4 b) 584Ml/Gd4 c) 292 Ml/Gd4 d) None of the mentioned
Last Answer : b) 584Ml/Gd4
Description : Is it necessary for an axle to be ______ with respect to rotating element? a) Stationary b) Moving c) Moving or stationary d) None of the listed
Last Answer : c) Moving or stationary
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
Description : Calculate the shaft diameter on rigidity basis if torsional moment is 196000N-mm, length of shaft is 1000mm. Permissible angle of twist per meter is 0.5’ and take G=79300N/mm2. a) None of the listed b) 41.2mm c) 35.8mm d) 38.8mm
Last Answer : b) 41.2mm
Description : The angle between normal stress and tangential stress is known as angle of ______ a. declination b. orientation c. obliquity d. rotation
Last Answer : c. obliquity
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 : If a circular shaft is welded to the plate by means of circumferential fillet, then the shaft is subjected to torsional moment M. If throat of weld is t, then torsional shear stress is given by a) M/2πtr2 b) M/πtr2 c) M/4πtr2 d) None of the listed
Last Answer : a) M/2πtr2
Description : Find the bending stress in the top weld is if thickness of weld is t. Given P=15kN and e=120mm. a) 230/t b) 360/t c) 200/t d) None of the listed
Last Answer : b) 360/t
Description : A bracket is shown welded to a vertical column by means of two fillet welds. The bending stress induced in the welds can be given by a) My/I b) 2My/I c) My/2I d) None of the listed
Last Answer : a) My/I
Description : If length of weld is l and leg h, then area of throat can be given by a) 0.707 hl b) 1.414hl c) hl d) None of the listed
Last Answer : a) 0.707 hl
Description : When the shaft is subjected to pure torsional moment, the torsional stress is given by? a) None of the listed b) 32M/πdɜ c) 16M/πdɜ d) 8M/πdɜ
Last Answer : c) 16M/πdɜ
Description : When the shaft is subjected to pure bending moment, the bending stress is given by? a) None of the listed b) 32M/πdɜ c) 16M/πdɜ d) 8M/πdɜ
Last Answer : b) 32M/πdɜ
Description : If 8 bolts are emplaced in a clamp coupling with shaft diameter 80mm d, calculate the tensile force on each bolt if coefficient of friction is 0.3 and torque transmitted is 4000N-m. a) 51234.4N b) 45968.3N c) 41666.7N d) None of the listed
Last Answer : c) 41666.7N
Description : Consider the following statements: [IES 2007] For a journal rotating in a bearing under film lubrication conditions, the frictional resistance is- 1. Proportional to the area of contact 2. Proportional to the viscosity of lubricant 3. ... 4 (b) 1 and 4 only (c) 2, 3 and 4 only (d) 2 and 3 only
Last Answer : (a) 1, 2, 3 and 4
Description : Consider tile following statements: [IES-1993; 2002; 2006] Radius of friction circle for a journal bearing depends upon 1. Coefficient of friction 2. Radius of the journal 3. Angular speed of rotation of the shaft Which of the ... ) 1,2 and 3 (b) Only 1 and 2 (c) Only 2 and 3 (d) Only 1 and 3
Last Answer : (b) Only 1 and 2
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 : An antifriction bearing consists of (a) rolling elements (b) races (c) cages (d) all of the listed
Last Answer : (d) all of the listed
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 : 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 : 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 : 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 : 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
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 : 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 : 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 : 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 : While calculating bending stress in the following welded joints which of the welds moment of inertia can be neglected? a) 1 b) None of the listed c) Both 1 & 3 d) Both 2 & 4
Last Answer : b) None of the listed
Description : Calculate the moment of inertia about the axis parallel to welds and shift it to CG by considering thickness of welds t. a) tɜ+2000t b) None of the listed c) 250000 t d) 125000 t
Last Answer : c) 250000 t
Description : Relation between throat and leg for a parallel fillet weld is a) t =h Cos (45’) b) h =t Cos (45’) c) h= t d) None of the listed
Last Answer : a) t =h Cos (45’)
Description : The length of each of the two equal sides of a parallel fillet weld is called a) Leg b) Throat c) Arm d) None of the listed
Last Answer : a) Leg
Description : Filler material is used in electric resistance welding. a) Yes b) No filler material used c) Depends on the type of welding d) None of the listed
Last Answer : b) No filler material used
Description : Forge welding involves heating of parts to elastic stage and joint is prepared by impact force. a) Yes b) No, it is done up to plastic stage c) Heating is done up to boiling point d) None of the listed
Last Answer : b) No, it is done up to plastic stage
Description : All welding processes require pressure along with heat. a) Yes b) No, fusion doesn’t require c) Can’t be stated d) None of the listed
Last Answer : b) No, fusion doesn’t require
Description : Which type of threads is recommended for fluctuating loads? a) Fine threads b) Coarse Threads c) Either of fine or coarse d) None of the listed
Last Answer : a) Fine threads
Description : Which of the following help in accomplishing the locking? a) Creating supplementary friction b) Using special locking devices like split pins c) By plastic deformation d) All of the listed
Description : The shock absorbing capacity of bolts can be increased by a) Increasing the shank diameter b) Decreasing the length of shank portion of bolt c) Increase the shank diameter and decreasing the length of shank d) None of the listed
Last Answer : d) None of the listed
Description : Resilience is defined as the property of material to absorb energy when deformed _________ and to release this energy when unloaded. a) Elastically b) Plastically c) Up to fracture point d) None of the listed
Last Answer : a) Elastically
Description : Calculate the force acting on the each pin in flexible coupling if torque transmitted is 397N-m and PCD=120mm with number of pins 6. a) 1400.3N b) 1102.8N c) 1320.3N d) None of the listed
Last Answer : b) 1102.8N
Description : A muff coupling is connecting two shafts. The torque involved is 650N-m. The shaft diameter is 45mm with length and height of the key being 14mm and 80mm respectively. Find the compressive stress induced in the key. a) 70.1 N/mm2 b) 51.6N/mm2 c) 45.5N/mm2 d) None of the listed
Last Answer : b) 51.6N/mm2
Description : A muff coupling is connecting two shafts. The torque involved is 650N-m. The shaft diameter is 45mm with length and breadth of the key being 14mm and 80mm respectively. Find the shear stress induced in the key. a) 30.2N/mm2 b) 25.8N/mm2 c) 34.4N/mm2 d) None of the listed
Last Answer : b) 25.8N/mm2