Dynamics of Machinery (3151911) MCQs

MCQs of Gyroscope

Showing 1 to 10 out of 50 Questions
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1.

The engine of an aeroplane rotates in a 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
Answer:

Option (a)

2.

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 the 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
Answer:

Option (b)

3.

The rotor of a ship rotates in a clockwise direction when viewed from the stern and the ship takes a left turn. The effect of the gyroscopic couple acting on it will be

(a)

to raise the bow and stern
(b)

to lower the bow and stern
(c)

to raise the bow and lower the stern
(d)

to lower the bow and raise the stern
Answer:

Option (c)

4.

When the pitching of a ship is upward, the effect of the 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
Answer:

Option (b)

5.

A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, then due to the centrifugal forces

(a)

the reaction on the inner wheels increases and on the outer wheels decreases
(b)

the reaction on the outer wheels increases and on the inner wheels decreases
(c)

the reaction on the front wheels increases and on the rear wheels decreases
(d)

the reaction on the rear wheels increases and on the front wheels decreases
Answer:

Option (b)

6.

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 the right or left, while it moves forward
(c)

rolling of a complete ship side-ways
(d)

none of the above
Answer:

Option (b)

7.

The maximum gyroscopic couple acting on the ship tends to shear the holding down bolts.

(a)

Correct
(b)

Incorrect
Answer:

Option (a)

8.

The axis of precession is ____________ to the plane in which the axis of spin is going to rotate.

(a)

parallel
(b)

perpendicular
(c)

spiral
(d)

none of the mentioned
Answer:

Option (b)

9.

The rolling of a complete ship side-ways is known as the pitching of a ship.

(a)

True
(b)

False
Answer:

Option (b)

10.

A device which consists of a wheel or disc mounted so that it can spin rapidly about an axis which is itself free to alter indirection is called

(a)

telescope
(b)

gyroscope
(c)

ammeter
(d)

voltmeter
Answer:

Option (b)

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