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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 1
26.
The dynamic friction is the friction experienced by a body, when the body
is in motion
is at rest
just begins to slide over the surface of the other body
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
The steering of a ship means
movement of a complete ship up and down in vertical plane about transverse axis
turning of a complete ship in a curve towards right or left, while it moves forward
rolling of a complete ship side-ways
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
The tractive force in a locomotive with two cylinders is given by (where c = Fraction of reciprocating parts per cylinder, m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, and θ = Angle of inclination of crank to the line of stroke)
m.ω2.r cos θ
c.m.ω2.r sin θ
(1 - c)m.ω2.r(cos θ - sin θ)
m.ω2.r(cos θ - sin θ)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The radial distance of a tooth from the pitch circle to the bottom of the tooth is called
dedendum
addendum
clearance
working depth
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be
minimum
zero
maximum
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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