0°

90°

180°

360°

A. 0°

Shoe brake

Band brake

Band and block brake

Internal expanding brake

Knife edge follower

Flat faced follower

Spherical faced follower

Roller follower

Screw pair

Spherical pair

Turning pair

Sliding pair

ω/2π

2π/ω

ω × 2π

π/ω

1.4 N-s/m

18.52 N-s/m

52.92 N-s/m

529.2 N-s/m

R (1 - cosθ)

(R - r₁) (1 - cosθ)

R (1 - sinθ)

(R - r₁) (1 - sinθ)

Simple gear train

Reverted gear train

Sun and planet gear

Differential gear

D-slide valve

Governor

Meyer's expansion valve

Flywheel

Bevel gear

Universal joint

Hooke's joint

Knuckle joint

Machines transmit mechanical work, whereas structures transmit forces

In machines, relative motion exists between its members, whereas same does not exist in case of structures

Machines modify movement and work, whereas structures modify forces

Efficiency of machines as well as structures is below 100%

ω²r. (n + 1)/n

ω²r. (n - 1)/n

ω²r. n/(n + 1)

ω²r. n/(n - 1)

Parallel to the link joining the points

Perpendicular to the link joining the points

At 45° to the link joining the points

None of the above

Radius of rotation of balls increases as the equilibrium speed decreases

Radius of rotation of balls decreases as the equilibrium speed decreases

Radius of rotation of balls increases as the equilibrium speed increases

Radius of rotation of balls decreases as the equilibrium speed increases

Stable

Unstable

Isochronous

None of these

Inertia

Momentum

Moment of momentum

Torque

Static friction

Dynamic friction

Limiting friction

Coefficient of friction

(r₁ - r₂) (1 - cosθ)

(r₁ + r₂) (1 + cosθ)

(r₁ - r₂) [(1 - cosθ)/cos θ]

(r₁ + r₂) [(1 - cosθ)/cos θ]

Structure

Mechanism

Inversion

Machine

P = W tan α

P = W tan (α + φ)

P = W (sin α + μ cos α)

P = W (cos α + μ sin α)

Watt governor

Porter governor

Hartnell governor

None of these

Motion of an I.C. engine valve

Motion of the shaft between a footstep bearing

Piston reciprocating inside an engine cylinder

All of the above

Four times the first one

Same as the first one

One fourth of the first one

One and a half times the first one

60 to 80 r.p.m.

80 to 100 r.p.m.

100 to 200 r.p.m.

200 to 300 r.p.m.

Minimise the effect of primary forces

Minimise the effect of secondary forces

Have perfect balancing

To start the locomotive quickly

Shear stress

Bending stress

Tensile stress

Compressive stress

Yes

No

It is a marginal case

Data are insufficient to determine it

To dip the nose and tail

To raise the nose and tail

To raise the nose and dip the tail

To dip the nose and raise the tail

α = 45° + φ/2

α = 45° - φ/2

α = 90° + φ

α = 90° - φ

Point or line contact between the two elements when in motion

Surface contact between the two elements when in motion

Elements of pairs not held together mechanically

Two elements that permit relative motion

Watt governor

Porter governor

Pickering governor

Hartnell governor