## Theory of Machine In involute gears, the pressure angle is

Dependent on the size of teeth
Always constant
Always variable
Dependent on the size of gears

## Theory of Machine When a body is subjected to transverse vibrations, the stress induced in a body will be

Bending stress
Shear stress
Tensile stress
Compressive stress

## Theory of Machine 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)

ω² R cosθ
ω² (R - r₁) sinθ
ω² (R - r₁) cosθ
ω² r₁ sinθ

## Theory of Machine The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line

Perpendicular to line as per (A)
Not possible to determine with these data
Joining the corresponding points
At 45° to line as per (A)

## Theory of Machine A point on a connecting link (excluding end points) of a double slider crank mechanism traces a

Parabolic path
Straight line path
Elliptical path
Hyperbolic path