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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 4
26.
The essential condition of placing the two masses, so that the system becomes dynamically equivalent, is (where l1 and l2 = Distance of two masses from the centre of gravity of the body, and kG = Radius of gyration of the body)
l1 = kG
l2 = kG
l1l2 = kG
l1l2 = kG2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
A Porter governor is a
pendulum type governor
dead weight governor
spring loaded governor
inertia governor
Answer: Option
Explanation:
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28.
The secondary 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 lengm of connecting rod to radius of crank)
m.ω2.r sin θ
m.ω2.r cos θ
m.ω2.r
m.ω2.r
Answer: Option
Explanation:
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29.
A type-writer constitutes a machine.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Due to slip of belt, the velocity ratio of the belt drive increases.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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