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1
GATE ME 2025
MCQ (Single Correct Answer)
+1
-0.33
In the context of balancing of rotating and reciprocating masses, which one of the following options is true?
A
An unbalanced rigid rotor can be completely balanced using a single balancing mass
B
An unbalanced rigid rotor can be completely balanced using two balancing masses attached in two distinct planes
C
A single-cylinder internal combustion engine can be completely balanced using a single balancing mass
D
A single-cylinder internal combustion engine can be completely balanced using two balancing masses
2
GATE ME 2025
Numerical
+1
-0
A block of mass 1 kg connected to a spring of stiffness $10 \mathrm{~N} \mathrm{~m}^{-1}$ is operating in a viscous medium such that the damping ratio (or damping factor) is equal to the ratio of the damped frequency to the natural frequency. The magnitude of the damping ratio for this system is ________ (rounded off to 2 decimal places).
Your input ____
3
GATE ME 2024
MCQ (Single Correct Answer)
+1
-0.33

A linear spring-mass-dashpot system with a mass of 2 kg is set in motion with viscous damping. If the natural frequency is 15 Hz, and the amplitudes of two successive cycles measured are 7.75 mm and 7.20 mm, the coefficient of viscous damping (in N.s/m) is

A

4.41

B

7.51

C

2.52

D

6.11

4
GATE ME 2023
Numerical
+1
-0

The figure shows a block of mass m = 20 kg attached to a pair of identical linear springs, each having a spring constant k = 1000 N/m. The block oscillates on a frictionless horizontal surface. Assuming free vibrations, the time taken by the block to complete ten oscillations is _________ seconds. (Rounded off to two decimal places)

Take π = 3.14.

GATE ME 2023 Theory of Machines - Vibrations Question 4 English
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