Theory of Machines MCQ Question with Answer

Theory of Machines MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Download Theory of Machines MCQ Question Answer PDF

Question No : 1
The type of gears used to connect two non parallel and non intersecting shafts is

Spur gear
Helical gear
Bevel gear
Spiral gear

Question No : 2
The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)

m.ω².r sinθ
m.ω².r cosθ
m.ω².r (sin 2θ/n)
m.ω².r (cos 2θ/n)

Question No : 3
In order to double the period of a simple pendulum, the length of the string should be

None of these

Question No : 4
In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.

Equal to
Directly proportional to
Inversely proportional to
Independent of

Question No : 5
The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)

m/(m + M)
M/(m + M)
(m + M)/m
(m + M)/M

Question No : 6
Which of the following mechanism is an approximate straight line motion mechanism?

Watt's mechanism
Grasshopper mechanism
Robert's mechanism
All of these

Question No : 7
The height of a Watt's governor is

Directly proportional to speed
Directly proportional to (speed)²
Inversely proportional to speed
Inversely proportional to (speed)²