Multiple Choice Questions (MCQ) with answers on Theory of Machines
Multiple Choice Questions (MCQ) with answers on Theory of Machines
1-Which one of the following is a lower pair?
(A) Cam and follower
(B) Toothed gearing
(C) Shaft rotating in bush
(D) None
2-The average tensions on the tight and slack side of a flat belt drive system are 700N and 400N respectively. If the linear velocity of the belt is 5m/s, the power transmitted by the system would be about:
(A) 1.5 kW
(B) 3 kW
(C) 5 kW
(D) 10 kW
3-In a 6×20 wire rope, number 6 indicates:
(A) Diameter of the wire rope in mm
(B) Number of strands in the wire rope
(C) Number of wires
(D) None
4-The motion transmitted between the teeth of two spur gears is generally:
(A) Sliding
(B) Rolling
(C) Rotary
(D) Partly sliding and partly rolling
5-The product of circular pitch and diametral pitch equals:
(A) π
(B) 1
(C) Infinity
(D) None
6-In a flat belt drive, the belt is subjected to maximum tension ‘T’ and a centrifugal tension ‘Tc’. For maximum power transmission:
(A) T=Tc
(B) T=2Tc
(C) T=3Tc
(D) T=4Tc
7-Which of the following is not a common section of V-belts?
(A) F
(B) C
(C) E
(D) A
8-A rack is a gear of infinite
(A) Pitch
(B) Module
(C) Diameter
(D) Number of teeth
9-The circular pitch of a toothed wheel with 24 teeth and a module of 4.25 mm is:
(A) 1.35 mm
(B) 4.25 mm
(C) 6.67 mm
(D) 13.35 mm
10-The maximum efficiency of a worm and worm wheel system in terms of friction angle (Φ) is:
(A) (1-cos Φ)/ (1+cos Φ)
(B) (1-sinΦ)/ (1+cos Φ)
(C) (1-sinΦ)/ (1+sin Φ)
(D) (1-tanΦ)/ (1+tan Φ)
11-In a multiple disc clutch, n1 and n2 are the number of discs on the driving and driven shafts respectively. Then the number of pairs of contact surface is:
(A) n1 + n2
(B) n1 + n2 – 1
(C) n1 – n2
(D) None
ANSWERS:
1-(C), 2-(A), 3-(B), 4-(B), 5-(A), 6-(C), 7-(A), 8-(C), 9-(D), 10-(C), 11-(B)