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4

The pull required to crush the rivet per pitch length is

A. p.t.σt

B. d.t.σc

C. π/4 × d² × σt

D. π/4 × d² × σc

Correct Answer :

B. d.t.σc


Related Questions

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4

When a body is subjected to a direct tensile stress (σ) in one plane, then maximum normal stress occurs at a section inclined at __________ to the normal of the section.

A.

B. 30°

C. 45°

D. 90°

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4

A continuous beam is one which is

A. Fixed at both ends

B. Fixed at one end and free at the other end

C. Supported on more than two supports

D. Extending beyond the supports

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4

The point of contra flexure is a point where

A. Shear force changes sign

B. Shear force is maximum

C. Bending moment changes sign

D. Bending moment is maximum

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4

Which of the following has the minimum atomic mass?

A. Oxygen

B. Sulphur

C. Nitrogen

D. Carbon

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4

Within elastic limit, stress is

A. Inversely proportional to strain

B. Directly proportional to strain

C. Square root of strain

D. Equal to strain

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4

The compression ratio for Diesel engines is

A. 3 to 6

B. 5 to 8

C. 15 to 20

D. 20 to 30

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4

The weakest section of a diamond riveting is the section which passes through

A. The first row

B. The second row

C. The central row

D. One rivet hole of the end row

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4

The maximum tangential stress in a thick cylindrical shell is always _________ the internal pressure acting on the shell.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

The principal constituents of a fuel are

A. Carbon and hydrogen

B. Oxygen and hydrogen

C. Sulphur and oxygen

D. Sulphur and hydrogen

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4

Shear stress induced in a shaft subjected to tension will be

A. Maximum at periphery and zero at center

B. Maximum at center

C. Uniform throughout

D. None of the above

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4

A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as

A. Cracking

B. Carbonisation

C. Fractional distillation

D. Full distillation

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4

Resilience of a material is considered when it is subjected to

A. Frequent heat treatment

B. Fatigue

C. Creep

D. Shock loading

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4

One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas.

A. 4/7

B. 11/4

C. 9/7

D. All of these

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4

The buckling load for a given column depends upon

A. Area of cross-section of the column

B. Length and least radius of gyration of the column

C. Modulus of elasticity for the material of the column

D. All of the above

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4

A key is subjected to side pressure as well at shearing forces. These pressures are called

A. Bearing stresses

B. Fatigue stresses

C. Crushing stresses

D. Resultant stresses

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4

The mass of excess air supplied is equal to

A. (23/100) × Mass of excess carbon

B. (23/100) × Mass of excess oxygen

C. (100/23) × Mass of excess carbon

D. (100/23) × Mass of excess oxygen

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4

Carnot cycle has maximum efficiency for

A. Petrol engine

B. Diesel engine

C. Reversible engine

D. Irreversible engine

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4

The entropy __________ in an irreversible cyclic process.

A. Remains constant

B. Decreases

C. Increases

D. None of these

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4

The pull required to tear off the plate per pitch length is (where p = Pitch of rivets, t = Thickness of plates, and σt, τ and σc = Permissible tensile, shearing and crushing stresses respectively)

A. (p - 2d) t × σc

B. (p - d) t × τ

C. (p - d) t × σt

D. (2p - d) t × σt

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4

The stress developed in a material at breaking point in extension is called

A. Breaking stress

B. Fracture stress

C. Yield point stress

D. Ultimate tensile stress

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4

A concentrated load is one which

A. Acts at a point on a beam

B. Spreads non-uniformly over the whole length of a beam

C. Spreads uniformly over the whole length of a beam

D. Varies uniformly over the whole length of a beam

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4

Which of the following is correct?

A. Gauge pressure = Absolute pressure + Atmospheric pressure

B. Absolute pressure = Gauge pressure + Atmospheric pressure

C. Absolute pressure = Gauge pressure - Atmospheric pressure

D. Atmospheric pressure = Absolute pressure + Gauge pressure

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4

The fuel mostly used in cement industry and in metallurgical processes is

A. Wood charcoal

B. Bituminous coke

C. Pulverised coal

D. Coke

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4

Which of the following is a proper sequence?

A. Proportional limit, elastic limit, yielding, failure

B. Elastic limit, proportional limit, yielding, failure

C. Yielding, proportional limit, elastic limit, failure

D. None of the above

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4

The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the fixed end.

A. wl/4

B. wl/2

C. wl

D. wl²/2

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4

The stress induced in a body due to suddenly applied load compared to when it is applied gradually is

A. Same

B. Half

C. Two times

D. Four times

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4

If percentage reduction in area of a certain specimen made of material 'A' under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material 'B' is 40%, then

A. The material A is more ductile than material B

B. The material B is more ductile than material A

C. The ductility of material A and B is equal

D. The material A is brittle and material B is ductile

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4

The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)

A. δQ = T.ds

B. δQ = T/ds

C. dQ = ds/T

D. None of these

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4

A steel bar of 5 mm is heated from 25°C to 45°C and it is free to expand. The bar will induce

A. No stress

B. Shear stress

C. Tensile stress

D. Compressive stress

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4

A column is said to be a short column, when

A. Its length is very small

B. Its cross-sectional area is small

C. The ratio of its length to the least radius of gyration is less than 80

D. The ratio of its length to the least radius of gyration is more than 80