Theory of machines - Part 1 Online Exam Quiz
Theory of machines - Part 1 GK Quiz. Question and Answers related to Theory of machines - Part 1. MCQ (Multiple Choice Questions with answers about Theory of machines - Part 1
The ratio of the actual damping coefficient to the critical damping coefficient is called damping factor.
Options
A : Yes
B : No
C : -
D : -
When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to
Options
A : zero
B : one
C : ?/2
D : ?
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
Options
A : 0.2
B : 0.4
C : 0.6
D : 0.8
For high speed engines, the cam follower should move with
Options
A : uniform velocity
B : simple harmonic motion
C : uniform acceleration and retardation
D : cycloidal motion
In a coupling rod of a locomotive, each of the four pairs is a __________ pair.
Options
A : sliding
B : turning
C : rolling
D : screw
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
Options
A : 0°
B : 90°
C : 180°
D : 360°
In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon
Options
A : total lift, total angle of lift, minimum radius of cam and cam speed
B : radius of circular arc, cam speed, location of centre of circular arc and roller diameter
C : mass of cam follower linkage, spring stiffness and cam speed
D : total lift, centre of gravity of the cam and cam speed
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
Options
A : stable
B : unstable
C : isochronous
D : none of these
The factor which affects the critical speed of a shaft is
Options
A : diameter of disc
B : span of shaft
C : eccentricity
D : all of these
The partial balancing of reciprocating parts in locomotives produces
Options
A : hammer blow
B : swaying couple
C : variation in tractive force along the line of stroke
D : all of the above
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