Top 80+ Solved Dynamics of Machines MCQ Questions Answer
Q. Which of the following is incorrect regarding inertia force?
a. imaginary force
b. acts upon a rigid body
c. brings the body to equilibrium
d. same direction as of accelerating force
Q. For a 4 cylinder engine, when the pressure inside the cylinders exceeds the atmospheric pressure then.
a. work is done by the gases
b. work is done on the gases
c. work is done on the piston wall
d. work is done by the piston wall
Q. In a punching press, which of the following quantity is constant?
a. load
b. torque
c. angular velocity
d. angle of rotation
Q. Which of the following statements is correct about the balancing of a mechanical system?
a. if it is under static balance, then there will be dynamic balance also
b. if it is under dynamic balance, then there will be static balance also
c. both static as well as dynamic balance have to be achieved separately
d. none of the mentioned
Q. In a locomotive, the ratio of the connecting rod length to the crank radius is kept very large in order to
a. minimize the effect of primary forces
b. minimize the effect of secondary forces
c. have perfect balancing
d. start the locomotive conveniently
Q. The accelerometer is used as a transducer to measure earthquake in Richter scale. Its design is based on the principle that
a. its natural frequency is very low in comparison to the frequency of vibration
b. its natural frequency is very high in comparison to the frequency of vibration
c. its natural frequency is equal to the frequency of vibration
d. measurement of vibratory motion is without any reference point
Q. Critical speed is expressed as
a. rotation of shaft in degrees
b. rotation of shaft in radians
c. rotation of shaft in minutes
d. natural frequency of the shaft
Q. The first critical speed of an automobile running on a sinusoidal road is calculated by (modeling it as a single degree of freedom system)
a. resonance
b. approximation
c. superposition
d. rayleigh quotient
Q. 665×10-3m, calculate the critical speed of the shaft in rps. Centre of disc at 0.25m away from centre of axis of shaft.
a. 8.64
b. 9.64
c. 10.64
d. 12.2