Learn Machine Design MCQ Questions with answers and solutions.

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Q. In case of spur gears, the back lash depends on

(A) Module
(B) Pitch line velocity
(C) Tooth profile
(D) Both (A) and (B) above

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Q. If the threads on a bolt are right hand the threads on nut will be

(A) Right hand with less clearance
(B) Right hand withmore clerance
(C) Left hand with more clearance
(D) Right hand

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Q. Sand drops from the bottom of a hopper into a horizontally moving belt conveyor. If the conveyor is travelling at 2000 fpm and the sand is fed at the rate of 1500 1b/min, the force necessary to drive the conveyor would be

(A) 258 lb
(B) Zero
(C) Cannot be determined from the given data
(D) 10 kg

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Q. In nylon bearings operate at very high rpm molybdenum disulphide as used mainly to

(A) assists in heat dissipation
(B) provide porous bearing media for vibration absorption
(C) Increasing the diameter of threaded portion
(D) improve mechanical and lubricating properties

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Q. The pin supporting the exhaust iever of an internal combustion engine is subjected to a shear load of 400 kg/sq-cm the diameter of the pin should be

(A) 1.5 cm
(B) 4 cm
(C) 1 cm
(D) 6 cm

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Q. Which of the following is not a standard ball diameter for Brinell hardness testing?

(A) 25 mm
(B) 1 mm
(C) 10 mm
(D) 5 mm

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Q. Rivets are made of

(A) Brittle material
(B) Ductile material
(C) Soft material
(D) Hard material

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Q. A rolled steel flat designated as 50 ISF 8 means

(A) the flat is 50 mm wide and 8 mm thick
(B) Increasing the diameter of threaded portion
(C) the flat has cross-section 50 sq. mm and depth 8 mm
(D) the flat has cross-section 50 sq mm and width 8 mm

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Q. The loss of strength in compression which occurs when there is a gain in strength in the tension due to overloading is

(A) Bousehinger effect
(B) Relaxation
(C) Hysteresis
(D) Iso-strain

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Q. A spherical gas tank is made of 1 cm steel plate hemispheres but welded together. The tank is 1503 cm in diameter. The allowable internal pressure to which tank may be subjected is the permissible stress be limited to 840 kg/sq cm would be in the range

(A) 2.0 to 2.5 kg/sq-cm
(B) 3.5 to 5.0 kg/sq-cm
(C) 2.5 to 3.5 kg/sq-cm
(D) 1.5 to 2.0 kg/sq-cm

Machine Design MCQs with answers Page - 48

Q. In case of spur gears, the back lash depends on

Q. If the threads on a bolt are right hand the threads on nut will be

Q. Sand drops from the bottom of a hopper into a horizontally moving belt conveyor. If the conveyor is travelling at 2000 fpm and the sand is fed at the rate of 1500 1b/min, the force necessary to drive the conveyor would be

Q. In nylon bearings operate at very high rpm molybdenum disulphide as used mainly to

Q. The pin supporting the exhaust iever of an internal combustion engine is subjected to a shear load of 400 kg/sq-cm the diameter of the pin should be

Q. Which of the following is not a standard ball diameter for Brinell hardness testing?

Q. Rivets are made of

Q. A rolled steel flat designated as 50 ISF 8 means

Q. The loss of strength in compression which occurs when there is a gain in strength in the tension due to overloading is

Q. A spherical gas tank is made of 1 cm steel plate hemispheres but welded together. The tank is 1503 cm in diameter. The allowable internal pressure to which tank may be subjected is the permissible stress be limited to 840 kg/sq cm would be in the range

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