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Which of the following statement is correct?

A. The cold rolled shafting is stronger than hot rolled shafting

B. The hot rolled shafting is stronger than cold rolled shafting

C. The cold rolled and hot rolled shaftings are equally strong

D. The shafts are not made by rolling process

Correct Answer :

A. The cold rolled shafting is stronger than hot rolled shafting


Related Questions

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When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the

A. Thread

B. Middle

C. Shank

D. Head

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Basic shaft is one

A. Whose upper deviation is zero

B. Whose lower deviation is zero

C. Whose lower as well as upper deviations are zero

D. Does not exist

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4

The included angle between the sides of V-belt is

A. 40°

B. 45°

C. 38°

D. 60°

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4

The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

A. p = D sin (90°/T)

B. p = D sin (120°/T)

C. p = D sin (180°/T)

D. p = D sin (360°/T)

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4

Auto frettage is the method of

A. Joining thick cylinders

B. Calculating stresses in thick cylinders

C. Pre-stressing thick cylinders

D. Increasing the life of thick cylinders

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4

In designing a key, it is assumed that the distribution of forces along the length of key

A. Varies linearly

B. Is uniform throughout

C. Varies exponentially, being more at the torque-input end

D. Varies exponentially, being less at the torque-input end

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4

In worm, gears, pitch lead angle is

A. Half the angle between two inclined faces in axial plane

B. The angle between the tangent to the pitch helix and the plane of rotation

C. The angle between the tangent to the pitch helix and an element of the cylinder

D. None of the above

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4

The efficiency of a square threaded screw is maximum if the helix angle is equal to (Where φ = Angle of friction)

A. 90° - φ

B. 45° - φ

C. 45° - φ/2

D. 45° + φ/2

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4

The contact ratio is the ratio of

A. Length of arc of recess to the circular pitch

B. Length of path of contact to the circular pitch

C. Length of arc of contact to the circular pitch

D. Length of arc of approach to the circular pitch

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4

In a marine flange coupling, the pitch circle diameter of bolts is taken as

A. 1.2 d

B. 1.6 d

C. 2d

D. 2.5 d

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4

Antifriction bearings are

A. Sleeve bearings

B. Hydrodynamic bearings

C. Thin lubricated bearings

D. None of the above

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In unilateral system of tolerance, the tolerance is allowed on

A. Both sides of the actual size

B. One side of the actual size

C. One side of the nominal size

D. Both sides of the nominal size

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4

For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)

A. 2μ sinθ/(θ + sinθ)

B. μ sinθ/(2θ + sin 2θ)

C. 4μ sinθ/(θ + sinθ)

D. 4μ sinθ/(2θ + sin 2θ)

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4

The temperature required for full annealing in hypereutectoid steel is

A. 50°C above upper critical temperature

B. 50°C below upper critical temperature

C. 50°C above lower critical temperature

D. 50°C below lower critical temperature

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4

For a square key made of mild steel, the shear and crushing strength are related as

A. Shear strength is equal to crushing strength

B. Shear strength is greater than crushing strength

C. Shear strength is less than crushing strength

D. None of the above

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4

A leaf spring in automobiles is used

A. To apply forces

B. To measure forces

C. To absorb shocks

D. To store strain energy

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In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that

A. The effect of curvature of the cylinder wall is neglected

B. The tensile stresses are uniformly distributed over the section of the walls

C. The effect of the restraining action of the heads at the end of the pressure vessel is neglected

D. All of the above

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4

The ratio of driving tensions in V-belt drives is __________ flat belt drives.

A. Equal to

B. sinα times more than

C. sinα times less than

D. cosecα times more than

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4

In thrust bearings, the load acts

A. Along the axis of rotation

B. Parallel to the axis of rotation

C. Perpendicular to the axis of rotation

D. In any direction

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4

A bolt of uniform strength can be developed by

A. Keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt

B. Keeping the core diameter smaller than the diameter of the unthreaded portion

C. Keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt

D. None of the above

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4

Which of the following formula is used in designing a connecting rod?

A. Euler's formula

B. Rankine's formula

C. Johnson's straight line formula

D. Johnson's parabolic formula

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4

For maximum power, the velocity of the belt will be

A. √(T/m)

B. √(T/2m)

C. √(T/3m)

D. None of these

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4

For high speed engines, the cam follower should move with

A. Uniform velocity

B. Simple harmonic motion

C. Uniform acceleration and retardation

D. Cycloidal motion

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Which one of the following is a positive drive?

A. V-belt drive

B. Rope drive

C. Crossed flat belt drive

D. Chain drive

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4

In order to permit the thermal expansion/contraction of tubing, it should be

A. Crimped

B. Honed

C. Flared

D. Bent

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4

Slenderness ratio is the ratio of

A. Effective length of column to least radius of gyration of the column

B. Width of column to depth of column

C. Maximum size of column to minimum size of column

D. Effective length of column to width of column

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4

Two shafts A and B under pure torsion are of identical length and identical weight and are made of the same material. The shaft A is solid and the shaft B is hollow. We can say that

A. Shaft B is better than shaft A

B. Shaft A is better than shaft B

C. Both the shafts are equally good

D. None of these

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4

Rankine's theory of failure is applicable for following type of materials

A. Brittle

B. Ductile

C. Elastic

D. Plastic

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4

Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

A. p.d.σt

B. p.t.σt

C. (p - d) σt

D. (p - d) t.σt

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4

In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

A. Increase the key length

B. Increase the key depth

C. Increase the key width

D. Decrease the key length