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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

Correct Answer :

C. (p - d) t × σt


Related Questions

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4

The standard value of atmospheric pressure taken at sea level is

A. 1.013 bar

B. 760 mm of Hg

C. 1013 × 102 N/m2

D. All of these

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4

The efficiency of Joule cycle is

A. Greater than Carnot cycle

B. Less than Carnot cycle

C. Equal to Carnot cycle

D. None of these

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4

The property of a material which allows it to be drawn into a smaller section is called

A. Plasticity

B. Ductility

C. Elasticity

D. Malleability

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4

A thin cylindrical shell of diameter (D) and thickness (t) is subjected to an internal pressure (p). The ratio of longitudinal strain to volumetric strain is

A. (m - 1)/ (2m - 1)

B. (2m - 1)/ (m - 1)

C. (m - 2)/ (3m - 4)

D. (m - 2)/ (5m - 4)

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4

Mond gas is obtained by

A. Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

B. Carbonisation of bituminous coal

C. Passing steam over incandescent coke

D. Passing air and a large amount of steam over waste coal at about 650°C

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4

A fletched beam is used to

A. Change the shape of the beam

B. Effect the saving in material

C. Equalise the strength in tension and compression

D. Increase the cross-section of the beam

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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

The stress at which extension of the material takes place more quickly as compared to the increase in load is called

A. Elastic point of the material

B. Plastic point of the material

C. Breaking point of the material

D. Yielding point of the material

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4

The layer at the centre of gravity of the beam as shown in the below figure, will be

A. In tension

B. In compression

C. Neither in tension nor in compression

D. None of these

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4

When a rectangular beam is loaded transversely, the maximum compressive stress is developed on the

A. Top layer

B. Bottom layer

C. Neutral axis

D. Every cross-section

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4

For a beam, as shown in the below figure, when the load W is applied in the centre of the beam, the maximum deflection is

A. Wl3 / 48EI

B. 5Wl3 / 384EI

C. Wl3 / 392EI

D. Wl3 / 384EI

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4

The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)

A. Ru × T

B. 1.5 Ru × T

C. 2 Ru × T

D. 3 Ru × T

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4

One kg of ethylene (C2H4) requires 2 kg of oxygen and produces 22/7 kg of carbon dioxide and __________ kg of water or steam.

A. 9/7

B. 11/7

C. 7/4

D. 1/4

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4

The total strain energy stored in a body is termed a

A. Resilience

B. Proof resilience

C. Modulus of resilience

D. Toughness

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4

Diesel cycle consists of following four processes

A. Two isothermal and two isentropic

B. Two isentropic and two constant volumes

C. Two isentropic, one constant volume and one constant pressure

D. Two isentropic and two constant pressures

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4

If the slenderness ratio for a column is 100, then it is said to be a _________ column.

A. Long

B. Medium

C. Short

D. None of these

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4

The amount of heat generated per kg of fuel is known as

A. Calorific value

B. Heat energy

C. Lower calorific value

D. Higher calorific value

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4

For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.

A. Greater than

B. Less than

C. Equal to

D. None of these

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4

The area under the temperature-entropy curve (T - s curve) of any thermodynamic process represents

A. Heat absorbed

B. Heat rejected

C. Either (A) or (B)

D. None of these

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4

The ratio of the largest load in a test to the original cross-sectional area of the test piece is called

A. Elastic limit

B. Yield stress

C. Ultimate stress

D. Breaking stress

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4

The property of a material by virtue of which it can be beaten or rolled into plates is called

A. Malleability

B. Ductility

C. Plasticity

D. Elasticity

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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 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

The oxygen atom is ________ times heavier than the hydrogen atom.

A. 2

B. 8

C. 16

D. 32

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4

In the torsion equation T/J = τ/r = Gθ/ L, the term J/R is called

A. Shear modulus

B. Section modulus

C. Polar modulus

D. None of these

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4

The absolute zero pressure will be

A. When molecular momentum of the system becomes zero

B. At sea level

C. At the temperature of - 273 K

D. At the centre of the earth

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4

Modulus of rigidity is defined as the ratio of

A. Longitudinal stress to longitudinal strain

B. Volumetric stress to volumetric strain

C. Lateral stress to Lateral strain

D. Shear stress to shear strain

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4

In a free expansion process,

A. W1 - 2 = 0

B. Q1 - 2 = 0

C. dU = 0

D. All of these

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4

A material obeys hooks law up to

A. Plastic limit

B. Elastic limit

C. Yield point

D. Limit of proportionality

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4

The unit of Young's modulus is

A. mm/mm

B. kg/cm

C. Kg

D. kg/cm²