Top 80+ Solved Dynamics of Machines MCQ Questions Answer
Q. Calculate the work done per minute by a punch tool making 20 working strokes per min when a 30 mm diametre hole is punched in 5 mm thick plate with ultimate shear strength og 450 Mpa in each stroke.
a. 10.69 knm
b. 20.69 knm
c. 30.69 knm
d. 40.69 knm
Q. In latitude 25.0 S, SA (spin axis) of a FG (free gyro) is in position S40E and horizontal. Find the tilt after 6 hours.
a. 61.16 up
b. 61.16 down c) 51.15 up
Q. The steering of a ship means
a. movement of a complete ship up and down in vertical plane about transverse axis
b. turning of a complete ship in a curve towards right r left, while it moves forward
c. rolling of a complete ship sideways
d. none of the mentioned
Q. When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be
a. to move the ship towards starboard
b. to move the ship towards port side
c. to raise the bow and lower the stern
d. to raise the stern and lower the bow
Q. 24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m
a. 1.35 m
b. 1.42 m
c. 1.48 m
d. 1.50 m
Q. 24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m
a. 16.782
b. 17.824
c. 15.142
d. 17.161
Q. 24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m ; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m
a. 19000 n
b. 19064 n
c. 19032 n
d. 20064 n