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Engineering
Mechanical
ME Set-1
Theory of Machines
3

Theory of Machines MCQ with Answers

3) In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

0.2

0.4

0.6

0.8

Answer is:

0.6

Theory of Machines MCQ with Answers

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4) For high speed engines, the cam follower should move with

uniform velocity

simple harmonic motion

uniform acceleration and retardation

cycloidal motion

Answer is:

cycloidal motion

For high speed engines, the cam follower should move with

5) In a coupling rod of a locomotive, each of the four pairs is a __________ pair.

sliding

turning

rolling

screw

Answer is:

turning

6) If ?/?_n is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

0 Degree

90 Degree

180 Degree

360 Degree

Answer is:

180 Degree

7) In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon

total lift, total angle of lift, minimum radius of cam and cam speed

radius of circular arc, cam speed, location of centre of circular arc and roller diameter

mass of cam follower linkage, spring stiffness and cam speed

total lift, centre of gravity of the cam and cam speed

Answer is:

total lift, total angle of lift, minimum radius of cam and cam speed

Theory of Machines MCQ with Answers

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3) In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

0.6

Theory of Machines MCQ with Answers

Related Theory of Machines MCQ with Answers

4) For high speed engines, the cam follower should move with

cycloidal motion

5) In a coupling rod of a locomotive, each of the four pairs is a __________ pair.

turning

6) If ?/?n is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

180 Degree

7) In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon

total lift, total angle of lift, minimum radius of cam and cam speed

Theory of Machines MCQ with Answers

6) If ?/?_n is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach