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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 3
6.
The danger of breakage and vibration is maximum
below the critical speed
near the critical speed
above the critical speed
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
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 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:
No answer description is available. Let's discuss.
8.
For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that
governor A is more sensitive than governor B
governor B is more sensitive than governor A
both governors A and B are equally sensitive
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
The component of the acceleration, parallel to the velocity of the particle, at the given instant is called
radial component
tangential component
coriolis component
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
In a multiple V-belt drive, if one of the belt is broken, then we should replace
the broken belt only
all the belts
the broken belt and the belts on either side of it
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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