Top 80+ Solved Dynamics of Machines MCQ Questions Answer
Q. Neglecting the inertia of shaft and gears calculate the frequency of free torsional vibrations in Hz.
a. 4.7
b. 5.7
c. 4.5
d. 5.5
Q. 3 m. The engine rotates at 2400 r.p.m. clockwise when viewed from the rear. Find the gyroscopic couple on the aircraft.
a. 10.046 kn-m
b. 11.046 kn-m
c. 12.046 kn-m
d. 13.046 kn-m
Q. 6 m. It rotates at 1800 r.p.m. clockwise, when looking from the stern. Determine the gyroscopic couple, if the ship travels at 100 km/hr and steer to the left in a curve of 75 m radius.
a. 100.866 kn-m
b. 200.866 kn-m
c. 300.866 kn-m
d. 400.866 kn-m
Q. The height of a Watt’s governor is
a. directly proportional to speed
b. directly proportional to (speed)
c. inversely proportional to speed
d. inversely proportional to (speed)
Q. A Watt’s governor can work satisfactorily at speeds from
a. 60 to 80 r.p.m
b. 80 to 100 r.p.m c) 100 to 200 r.p.m d) 200 to 300 r.p.m
Q. The ratio of height of Porter governor to the height of Watt’s governor is
a. m/m + m
b. m/ m + m
c. m + m/m
d. m + m/m
Q. When the sleeve of a porter governor moves upwards, the governor speed
a. increases
b. decreases
c. remains unaffected
d. first increases and then decreases