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- 1. Multiple Choice
A disc spinning on its axis at 20 rad/s will undergo precession when a torque 100 N-m is applied about
an axis normal to it at an angular speed, if mass moment of inertia of the disc is the 1 kg-m2
(a) 2 rad/s
(b) 5 rad/s
(c) 10 rad/s
(d) 20 rad/s
- 2. Multiple Choice
The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane
takes a turn to the left. The effect of the gyroscopic couple on the aeroplane will be
(a) to raise the nose and dip the tail
(b) to dip the nose and raise the tail
(c) to raise the nose and tail
(d) to dip the nose and tail
- 3. Multiple Choice
The air screw of an aeroplane is rotating clockwise when looking from the front. If it makes a left turn,
the gyroscopic effect will
(a) tend to depress the nose and raise the tail
(b) tend to raise the nose and depress the tail
(c) tilt the aeroplane
(d) none of the above
- 4. Multiple Choice
When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be
(a) to move the ship towards port side
(b) to move the ship towards star-board
(c) to raise the bow and lower the stern
(d) to raise the stern and lower the bow
- 5. Multiple Choice
The axis of spin, the axis of precession and axis of applied gyroscopic couple are contained in
a) One plane
b) Two plane perpendicular to each other
c) Three planes perpendicular to one another
d) None of the above
- 6. Multiple Choice
The magnitude of gyroscopic couple applied to a disc of moment of inertia I, spinning with an angular velocity w, and having an angular velocity of precession wP is
a) I2w wp
b) Iw2wp
c) Iw wp2
d) Iwwp
- 7. Multiple Choice
A disc spinning on its axis at 20 rad/s will undergo precession when a torque 100 N-m is applied about an axis normal to it at an angular speed, if mass moment of inertia of the disc is the 1 kg-m2
(a) 2 rad/s
b) 5 rad/s
(c) 10 rad/s
(d) 20 rad/s
- 8. Multiple Choice
When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be
(a) to move the ship towards port side
(b) to move the ship towards star-board
(c) to raise the bow and lower the stern
(d) to raise the stern and lower the bow
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