Description : The longest leaf in Semi-elliptic leaf spring is known as (A) chief leaf (B) master leaf (C) major leaf (D) higher leaf
Last Answer : (B) 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
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 : 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 : 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 : 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 : 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 : Spiral spring is quite rigid. a) Yes b) No it is flexible c) It is of moderate rigidity d) Rigidity can’t be determined
Last Answer : b) No it is flexible
Description : The load shared by each spring is inversely proportional to the cross section of wire. a) Yes b) No, it is directly proportional c) It is proportional to its square d) It is proportional to its square root
Last Answer : b) No, it is directly proportional
Description : The type of spring used to absorb and release energy in mechanical watches is (A) Helical extension spring (B) Multi-leaf spring (C) Spiral spring (D) Helical torsion spring
Last Answer : (C) Spiral spring
Description : The type of spring used to achieve greater load carrying capacity within given space is (A) Spiral spring (B) Springs in series (C) Multi-leaf spring (D) Concentric springs
Last Answer : (D) Concentric springs
Description : The type of spring used to measure weights in spring balance is, (A) Helical extension spring (B) Multi-leaf spring (C) Spiral spring
Last Answer : (A) Helical extension spring
Description : The type of spring used in door hinges is, (A) Helical extension spring (B) Multi-leaf spring (C) Spiral spring (D) Helical torsion spring
Last Answer : (D) Helical torsion spring
Description : The type of spring used to absorb shocks and vibrations in vehicles is, (A) Helical extension spring (B) Multi-leaf spring (C) Spiral spring (D) Belleville (coned disk) spring
Last Answer : (B) Multi-leaf spring
Description : In leaf springs the longest leaf is known as (a) Lower leaf (b) Master leaf (c) Upper leaf (d) None of these
Last Answer : (b) Master leaf
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 : 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
Last Answer : 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 : 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 : 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 : 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 : 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 : 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 : 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 : 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 : 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 : 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 : 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 : 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 : 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 : 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
Description : Woodruff key permits _____ movement b/w shaft and the hub. a) Axial b) Radial c) Eccentric d) None of the listed
Last Answer : b) Radial
Description : The main advantage of sunk key is that it is a _____ drive. a) Positive b) Negative c) Neutral d) None of the listed
Last Answer : a) Positive
Description : Maximum shear stress in transverse fillet weld of leg h and length l is a) P/hl b) 1.21P/hl c) P/1.21hl d) None of the listed
Last Answer : b) 1.21P/hl