Theory of Machines MCQ with Answers

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

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

Answer is:

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

8) When the relation between the controlling force (F_c) and radius of rotation (r) for a spring controlled governor is F_c = ar + b, then the governor will be

Answer is:

unstable

9) The factor which affects the critical speed of a shaft is

Answer is:

all of these

Explanation:

The factor which affects the critical speed of a shaft is
* diameter of disc
* span of shaft
* eccentricity

10) The partial balancing of reciprocating parts in locomotives produces

Answer is:

all of the above