Top 150+ Solved Dynamics of Machinery MCQ Questions Answer
Q. Fluid resistance causes damping which is known as ______
a. Resistance damping
b. Fluid damping
c. Viscous damping
d. Liquid damping
Q. In which direction does the accelerating force acts?
a. Opposite to the motion
b. Along the motion
c. Perpendicular to motion
d. Variable
Q. The time interval after which the motion is repeated itself is known as ___________ .
a. Time period
b. Cycle
c. Frequency
d. Isolation
Q. Frequency of vibrations is usually expressed in
a. Number of cycles per hour
b. Number of cycles per minute
c. Number of cycles per second
d. None of these
Q. The motion completed during one time period is known as _______.
a. Period of vibration
b. Cycle
c. Frequency
d. All of the above
Q. Which of the following is a type of free vibration?
a. Longitudinal vibrations
b. Transverse vibrations
c. Torsional vibrations
d. A, B and C
Q. In a spring-mass system, which of the following force is not considered?
a. Spring force
b. Damping force
c. Accelerating force
d. A and B
Q. What is meant by node point?
a. The point at which amplitude of vibration is maximum
b. The point at which amplitude of vibration is minimum
c. The point at which amplitude of vibration is zero
d. None of the above
Q. The velocity of a particle moving with simple harmonic motion is _______ atthe mean position.
a. Zero
b. Minimum
c. Maximum
d. None of the mentioned
Q. At the mean position, the potential energy of the system is _______.
a. Zero
b. Minimum
c. Maximum
d. None of the mentioned
Q. In a spring-mass-damper system, which of the following force is considered?
a. Spring force
b. Damping force
c. Accelerating force
d. All of the above
Q. When the body vibrates under the influence of external force, then the bodyis said to be under ___________ .
a. Free vibrations
b. Natural vibrations
c. Forced vibrations
d. Damped vibrations
Q. A vertical spring-mass system has a mass of 0.5 kg and an initial deflectionof 0.2 cm. Find the spring stiffness.
a. 345 N/m
b. 245 N/m
c. 3452 N/m
d. 2452 N/m
Q. A system has a mass of 0.5 kg and spring stiffness of 2452 N/m. Find thenatural frequency of the system.
a. 5.14 Hz
b. 9.14 Hz
c. 11.14 Hz
d. 28.14 Hz
Q. The motion of a system executing harmonic motion with onenatural frequency is known as _______
a. principal mode of vibration
b. natural mode of vibration
c. both a. and b.
d. none of the above