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4

Rectilinear motion of piston is converted into rotary by

A. Cross head

B. Slider crank

C. Connecting rod

D. Gudgeon pin

Correct Answer :

B. Slider crank


Related Questions

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4

A foot step bearing and rotor of a vertical turbine form examples of

A. Incompletely constrained motion

B. Partially constrained motion

C. Completely constrained motion

D. Successfully constrained motion

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4

Whitworth quick return mechanism is obtained by inversion of

A. Slider crank mechanism

B. Kinematic chain

C. Five link mechanism

D. Roller cam mechanism

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4

The relation l = (2/3).(j + 2) apply only to kinematic chains in which lower pairs are used. This may be used to kinematic chains in which higher pairs are used, but each higher pair may be taken as equivalent to

A. One lower pair and two additional links

B. Two lower pairs and one additional link

C. Two lower pairs and two additional links

D. Any one of these

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4

For the same lift and same angle of ascent, a smaller base circle will give

A. A small value of pressure angle

B. A large value of pressure angle

C. There is no such relation with pressure angle

D. Something else

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4

The critical speed of a shaft depends upon its

A. Mass

B. Stiffness

C. Mass and stiffness

D. Stiffness and eccentricity

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4

A system in dynamic balance implies that

A. The system is critically damped

B. There is no critical speed in the system

C. The system is also statically balanced

D. There will absolutely no wear of bearings

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4

Crowning on pulleys helps

A. In increasing velocity ratio

B. In decreasing the slip of the belt

C. For automatic adjustment of belt position so that belt runs centrally

D. Increase belt and pulley life

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4

Governor is used in automobile to

A. Decrease the variation of speed

B. Maximize the fuel economy

C. Limit the vehicle speed

D. Maintain constant engine speed

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4

In a steam engine, the link constitutes a

A. Piston, piston rod and crosshead

B. Connecting rod with big and small end brasses, caps and bolts

C. Crank pin, crankshaft and flywheel

D. All of the above

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4

The pair is known as a higher pair, when the relative motion between the elements of a pair is

A. Turning only

B. Sliding only

C. Rolling only

D. Partly turning and partly sliding

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4

The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)

A. (1/2) μ W R cosecα

B. (2/3) μ W R cosecα

C. (3/4) μ W R cosecα

D. μ W R cosecα

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4

In a gear having involute teeth, the normal to the involute is a tangent to the

A. Pitch circle

B. Base circle

C. Addendum circle

D. Dedendum circle

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4

A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)

A. m₁r₂ = m₂r₁

B. m₁r₁ = m₂r₂

C. m₁m₂ = r₁r₂

D. None of these

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4

Scotch yoke mechanism is used to generate

A. Sine functions

B. Square roots

C. Logarithms

D. Inversions

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4

When a ship travels in a sea, which of the effect is more dangerous

A. Steering

B. Pitching

C. Rolling

D. All of the above

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4

The Klein's method of construction for reciprocating engine mechanism

A. Is a simplified version of instantaneous centre method

B. Utilises a quadrilateral similar to the diagram of mechanism for reciprocating engine

C. Enables determination of coriolis component

D. Is based on the acceleration diagram

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4

In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is Constant, then

A. Open belt drive is recommended

B. Crossed belt drive is recommended

C. Both open belt drive and crossed belt drive is recommended

D. The drive is recommended depending upon the torque transmitted

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4

When the body is suspended at the point of suspension, its periodic time and frequency will be ________ as compared to the body suspended at the point of percussion.

A. Same

B. Two times

C. Four times

D. None of these

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4

The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)

A. sin (θ + φ) + 1/ cos (θ - φ) + 1

B. cos (θ - φ) + 1/ sin (θ + φ) + 1

C. cos (θ + φ) + 1/ cos (θ - φ) + 1

D. cos (θ - φ) + 1/ cos (θ + φ) + 1

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4

The ratio of the number of teeth to the pitch circle diameter in millimetres, is called

A. Circular pitch

B. Diametral pitch

C. Module

D. None of these

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4

To connect two parallel and coplanar shafts the following type of gearing is used

A. Spur gear

B. Bevel gear

C. Spiral gear

D. None of the above

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4

The coriolis component of acceleration exists whenever a point moves along a path that has

A. Linear displacement

B. Rotational motion

C. Gravitational acceleration

D. Tangential acceleration

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4

Oldham's coupling is the

A. Second inversion of double slider crank chain

B. Third inversion of double slider crank chain

C. Second inversion of single slider crank chain

D. Third inversion of slider crank chain

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4

A simple spring-mass vibrating system has a natural frequency of fn. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become

A. fn/2

B. 2 fn

C. 4 fn

D. 8 fn

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4

Which type of gearing is used in steering system of an automobile?

A. Rack and pinion

B. Worm and wheel

C. Spiral gears

D. None of the above

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4

The amplitude of vibration is always __________ the radius of the circle.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

The instantaneous centres which vary with the configuration of mechanism are called

A. Permanent instantaneous centres

B. Fixed instantaneous centres

C. Neither fixed nor permanent instantaneous centres

D. None of the above

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4

In a Hartnell governor, the compression of the spring is __________ the lift of the sleeve.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

The condition for correct steering of a Davis steering gear is (where α = Angle of inclination of the links to the vertical)

A. sinα = b/c

B. cosα = c/b

C. tanα = c/2b

D. cotα = c/2b

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4

The dynamic friction is the friction experienced by a body, when the body

A. Is in motion

B. Is at rest

C. Just begins to slide over the surface of the other body

D. None of the above