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4

In a reciprocating steam engine, which of the following forms a kinematic link?

A. Cylinder and piston

B. Piston rod and connecting rod

C. Crankshaft and flywheel

D. Flywheel and engine frame

Correct Answer :

C. Crankshaft and flywheel


Related Questions

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4

In a multiple V-belt drive, if one of the belts is broken, then we should replace

A. The broken belt only

B. All the belts

C. The broken belt and the belts on either side of it

D. None of the above

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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

Creep in belt drive is due to

A. Material of the pulley

B. Material of the belt

C. Larger size of the driver pulley

D. Uneven extensions and contractions due to varying tension

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4

The main disadvantage of the sliding pair is that it is

A. Bulky

B. Wears rapidly

C. Difficult to manufacture

D. Both (A) and (B) above

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4

Hammer blow

A. Is the maximum horizontal unbalanced force caused by the mass provided to balance the reciprocating masses.

B. Is the maximum vertical unbalanced force caused by the mass added to balance the reciprocating masses

C. Varies as the square root of the speed

D. Varies inversely with the square of the speed

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4

A spring controlled governor is said to be stable if the controlling force line when produced intersects the Y-axis

A. At the origin

B. Below the origin

C. Above the origin

D. Any one of these

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4

The radial distance of a tooth from the pitch circle to the bottom of the tooth is called

A. Dedendum

B. Addendum

C. Clearance

D. Working depth

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4

Coriolis component is encountered in

A. Quick return mechanism of shaper

B. Four bar chain mechanism

C. Slider crank mechanism

D. Both (A) and (C) above

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4

The ratio of maximum fluctuation of speed to the mean speed is called

A. Fluctuation of speed

B. Maximum fluctuation of speed

C. Coefficient of fluctuation of speed

D. None of these

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4

Pitch point on a cam is

A. Any point on pitch curve

B. The point on cam pitch curve having the maximum pressure angle

C. Any point on pitch circle

D. The point on cam pitch curve having the minimum pressure angle

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4

When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

A. Smaller

B. Larger

C. Either A or B

D. None of these

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4

Transmission angle is the angle between

A. Input link and coupler

B. Input link and fixed link

C. Output link and coupler

D. Output link and fixed link

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4

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)

A. m.ω².r cosθ

B. c.m.ω².r sinθ

C. (1 - c).m.ω².r (cosθ - sinθ)

D. m.ω².r (cosθ - sinθ)

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4

Whirling speed of the shaft is the speed at which

A. Shaft tends to vibrate in longitudinal direction

B. Torsional vibrations occur

C. Shaft tends to vibrate vigorously in transverse direction

D. Combination of transverse and longitudinal vibration occurs

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4

The Kutzbach criterion for determining the number of degrees of freedom (n) is (where l = number of links, j = number of joints and h = number of higher pairs)

A. n = 3(l - 1) - 2j - h

B. n = 2(l - 1) -2j - h

C. n = 3(l - 1) - 3j - h

D. n = 2(l - 1) - 3j - h

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4

In an open pair, the two elements of a pair

A. Have a surface contact when in motion

B. Have a line or point contact when in motion

C. Are kept in contact by the action of external forces, when in motion

D. Are not held together mechanically

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4

The velocity of piston in a reciprocating steam engine is given by (where ω = Angular velocity of crank, r = Radius of crank pin circle, θ = Angle turned by crank from inner dead centre, and n = Ratio of length of connecting rod to the radius of crank)

A. ωr [sin θ + (sin 2θ/n)]

B. ωr [cos θ + (cos 2θ/n)]

C. ω²r [sin θ + (sin 2θ/n)]

D. ω²r [cos θ + (cos 2θ/n)]

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4

The example of spherical pair is

A. Bolt and nut

B. Lead screw of a lathe

C. Ball and socket joint

D. Ball bearing and roller bearing

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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

When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

A. D-slide valve

B. Governor

C. Meyer's expansion valve

D. Flywheel

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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

Klein's construction can be used when

A. Crank has a uniform angular velocity

B. Crank has non-uniform velocity

C. Crank has uniform angular acceleration

D. Crank has uniform angular velocity and angular acceleration

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4

The coriolis component of acceleration is taken into account for

A. Slider crank mechanism

B. Four bar chain mechanism

C. Quick return motion mechanism

D. All of these

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4

Flexible coupling is used because

A. It is easy to disassemble

B. It is easy to engage and disengage

C. It transmits shocks gradually

D. It prevents shock transmission and eliminates stress reversals

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4

The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.

A. More than

B. Less than

C. Same as

D. None of these

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4

The Klein's method of construction for reciprocating engine mechanism

A. Is based on acceleration diagram

B. Is a simplified form of instantaneous center method

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

D. Enables determination of Carioles component

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4

When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a

A. Lower pair

B. Higher pair

C. Self-closed pair

D. Force-closed pair

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4

Elements of pairs held together mechanically is known as

A. Closed pair

B. Open pair

C. Mechanical pair

D. Rolling pair

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4

The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be

A. To dip the nose and tail

B. To raise the nose and tail

C. To raise the nose and dip the tail

D. To dip the nose and raise the tail

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4

The velocity of the rubbing surface __________ with the distance from the axis of the bearing.

A. Increases

B. Decreases

C. Remain same

D. None of these