Description : Entire torque is transmitted by friction in the clamp coupling. a) True b) False
Last Answer : b) False
Description : If 8 bolts are emplaced in a clamp coupling with shaft diameter 80mm d, calculate the diameter of each bolt if coefficient of friction is 0.3 and torque transmitted is 4000N-m. Permissible tensile stress is 80N/mm2. a) 27mm b) 25mm c) 23mm d) 21mm
Last Answer : a) 27mm
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 : In case of clamp coupling, power is transmitted by means of, (A) Friction force (B) Shear resistance (C) Crushing resistance (D) None of the above
Last Answer : (A) Friction force
Description : Clamp coupling employ bolts. a) True b) False
Last Answer : a) True
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 : Power is transmitted by only in rigid flange coupling. a) True b) False
Description : If shaft diameter is 40mm, calculate the length of sleeves in clamp coupling. a) 80mm b) 140mm c) 100mm d) 120mm
Last Answer : b) 140mm
Description : If shaft diameter is 40mm, calculate the diameter of sleeves in clamp coupling. a) 100mm b) 80mm c) 60mm d) 40mm
Last Answer : a) 100mm
Description : Does shaft has to be shifted i axial direction to remove clamp coupling. a) Yes b) No
Last Answer : b) No
Description : Saddle key is transmit power or torque through friction resistant only A. True B. False
Last Answer : A. True
Description : Which of the following are not true for petroff’s equation? a) Shaft is considered concentric with the bearing b) Bearing is subjected to light load c) Is used to find coefficient of friction d) Frictional torque is given by fpr2l
Last Answer : d) Frictional torque is given by fpr2l
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 : Two shafts A and B are made of same material. The diameter of shaft A is twice that of B. The torque transmitted by shaft A will be (A) Twice that of B (B) Four times that of B (C) Eight times that of B (D) Sixteen times that of B
Last Answer : (C) Eight times that of B
Description : Splines are used if, (A) The power to be transmitted is high (B) The torque to be transmitted is high (C) The speed is high (D) There is relative motion between shaft and hub
Last Answer : (D) There is relative motion between shaft and hub
Description : Two shafts A and B are made of same material. The diameters of shaft A and B are dA and dB respectively. The ratio of torque transmitted by shaft A to that of shaft B will be (A) dA/dB- (B) (dA/dB-)2 (C) (dA/dB-)3 (D) (dA/dB-)4
Last Answer : (C) (dA/dB-)3
Description : Clutch and coupling can be considered to be same. a) True b) False
Description : A machine started malfunctioning due to some issues with the coupling. The coupling emplaced in the machine was Oldham. The only coupling available in the workshop is Hooke’s coupling. So Oldham coupling can be replaced by Hooke’s coupling. a) True b) False
Description : Oldham coupling i used to connect two shafts having intersecting axes. a) True b) False
Description : A coupling is a mechanical device that temporarily joins two rotating shafts to each other. a) True b) False
Description : Flange coupling is rigid types coupling. A. True B. False
Description : Universal coupling is rigid types coupling. A. True B. False
Last Answer : B. False
Description : Cotter joint is going to be use to connect the two rods for torque transmission purpose. a) True b) False
Description : Cotter joints is used for transforming rotating torque. A. True B. False
Description : Cotter joint can be used to connect two rods for torque transmission purpose. true /false. a) True b) False
Description : A knuckle joint is unsuitable for two rotating shafts, which transmit torque a) True b) False
Description : Cotter joint can be used to connect two rods for torque transmission purpose. a) True b) False
Description : Axle is frequently used in torque transmission. a) True b) False
Description : Assertion (A): Oil as a cutting fluid result in a lower coefficient of friction. Reason (R): Oil forms a thin liquid film between the tool face and chip, and it provides 'hydrodynamic lubrication'. [IES- 2000] (a ... explanation of A (c) A is true but R is false (d) A is false but R is true
Last Answer : (c) A is true but R is false
Description : Assertion (A): In anti-friction bearings, the frictional resistance is very low as the shaft held by it remains in floating condition by the hydrodynamic pressure developed by the lubricant. [IES-2006] Reason (R): In hydrodynamic ... of A (c) A is true but R is false (d) A is false but R is true
Last Answer : (d) A is false but R is true
Description : Efficiency of the screw depends upon helix angle but does not depend on friction angle. a) True b) False
Description : Partial bearing is preferred over journal bearing. a) True b) No c) More friction losses d) Can’t be determined
Description : The split - pin is used in... A. Cotter joint B. Knuckle joint C. Universal coupling D. Bolted joint
Last Answer : B. Knuckle joint
Description : The joints between link of a suspension bridge, which of the following joints used.. A. Cotter joint B. Knuckle joint C. Universal coupling D. Bolted joint
Description : To joining the links of a bicycle chain which of the following joint is used. A. Cotter joint B. Knuckle joint C. Universal coupling D. Bolted joint
Description : Forked - pin joints is also called as... A. Cotter joint B. Knuckle joint C. Universal coupling D. Bolted joint