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Machine Dynamics
Advanced Machine Dynamics
Quiz 1
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Q.1
The pitching effect of a naval-ship produces force(s) on which of the following components of the ship?
a) Bearings
b) Lubricant
c) Seals
d) Springs
Q.2
Which of the following represent the maximum angular acceleration?
a) αmax = Φ(ω1)2
b) αmax = Φ2 (ω1)2
c) αmax = (ω1)2/ Φ
d) αmax = (ω1)2/ Φ2
Q.3
Pitching is the movement of a ship up and down in a vertical plane about transverse axis.
a) True
b) False
Q.4
The pitching of the ship is assumed to take place with which of the following motion?
a) Constant acceleration
b) Simple Harmonic Motion
c) Cycloidal
d) Uniform Velocity
Q.5
Maximum couple during pitching is given by : (ω: angular velocity of rotor & ωpmax: Maximum angular velocity of precession).
a) Cmax = I.(ωpmax)2
b) Cmax = I.(ω)2
c) Cmax = I. ω. ωpmax
d) Cmax = I2. ω. ωpmax
Q.6
During upward pitching, Gyroscopic couple will tend to move the ship towards ________
a) Star-board
b) Port side
c) Ship movement is unaffected by upward pitching
d) Left side
Q.7
During downward pitching, Gyroscopic couple will tend to move the ship towards ________
a) Star-board
b) Port side
c) Ship movement is unaffected by upward pitching
d) Right side
Q.8
If the movement of the ship were to occur about a vertical plane about a parallel axis then which of the following factors will be affected while pitching?
a) Upward pitch
b) Downward pitch
c) Pitching will not occur
d) Change in angular velocity of rotor
Q.9
What will be the effect of a gyroscopic couple if the axis of precession and axis of spin become parallel?
a) No effect
b) Pitching
c) Steering effect
d) No motion
Q.10
Which of the following is known as the axis of precession?
a) Latitudinal axis
b) Longitudinal axis
c) Reverse axis
d) Axis of spin
Q.11
The axis of precession is parallel to axis of spin during rolling for only a selected few positions.
a) False
b) True
Q.12
Which of the following would change during rolling of a navalship?
a) Angular velocity of precession
b) Angular acceleration of precession
c) Angular velocity of spin
d) No change occurs
Q.13
The gyroscope couple does not cause an effect on a naval ship during which of these motions?
a) Pitching
b) Steering
c) Rolling
d) Lifting
Q.14
Rolling is the turning of a complete ship in a curve towards left or right, while it moves forward.
a) True
b) False
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