## Theory of Machine A body in motion will be subjected to Coriolis acceleration when that body is

In plane motion which is a resultant of plane translation and rotation
Restrained to rotate while sliding over another body
In plane translation with variable velocity
In plane rotation with variable velocity

Circular
Reciprocating
None of these
Tangent

## Theory of Machine In order to facilitate starting of locomotive in any position, the cranks of a locomotive with two cylinders, are placed at

180° to each other
90° to each other
120° to each other
45° to each other

## Theory of Machine For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimed stroke respectively, is

Minimum and maximum
Zero and maximum
Zero and minimum
Maximum and zero

## Theory of Machine The advantage of the piston valve over the slide valve is that in the former case

Power absorbed is less
Wear is less
The pressure developed being high provides tight sealing
Both wear and power absorbed are low

## Theory of Machine 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 length of connecting rod to radius of crank)

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