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4

Shear modulus is the ratio of

A. Linear stress to linear strain

B. Linear stress to lateral strain

C. Volumetric strain to linear strain

D. Shear stress to shear strain

Correct Answer :

D. Shear stress to shear strain


Related Questions

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4

Formula based on IS codes is based on

A. Straight line formula

B. Eulers formula

C. Rankines formula

D. Secant formula

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4

If Kh is the torque resisting capacity of a hollow shaft and Ks is that of a solid shaft, of the same material, length and weight. Then,

A. Kh > Ks

B. Kh < Ks

C. Kh = Ks

D. None of these

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4

When a gas is heated, change takes place in

A. Pressure

B. Volume

C. Temperature

D. All of these

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4

Producer 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

The intensity of stress which causes unit strain is called

A. Unit mass

B. Modulus of rigidity

C. Bulk modulus

D. Modulus of Elasticity

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4

The atomic mass of oxygen is

A. 12

B. 14

C. 16

D. 32

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4

Slenderness of a column is zero when

A. Ends are firmly fixed

B. Column is supported on all sides throughout the length

C. Length is equal to radius of gyration

D. Length is twice the radius of gyration

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4

Workdone during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)

A. (p1 v1 - p2 v2)/(γ - 1)

B. [m R (T1 - T2)] /(γ - 1)

C. [m R T1/(γ - 1)][1 - (p2 v2 /p1 v1)]

D. All of these

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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

The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)

A. v1/v2

B. v2/v1

C. (v1 + v2)/v1

D. (v1 + v2)/v2

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4

Otto cycle is also known as

A. Constant pressure cycle

B. Constant volume cycle

C. Constant temperature cycle

D. Constant temperature and pressure cycle

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4

The radius of the Mohrs circle in the given figure is equal to

A. Sum of two principal stresses

B. Difference of two principal stresses

C. Half the sum of two principal stresses

D. Half the difference of two principal stresses

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4

A cycle consisting of two constant pressure and two isentropic processes is known as

A. Carnot cycle

B. Stirling cycle

C. Otto cycle

D. None of these

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4

In an ideal gas turbine plant, it is assumed that the compression and expansion processes are

A. Isothermal

B. Isentropic

C. Polytropic

D. None of these

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4

The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is always __________ one.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as

A. Zeroth law of thermodynamics

B. First law of thermodynamics

C. Second law of thermodynamics

D. Kinetic theory of gases

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4

The value of 1 mm of Hg is equal to

A. 1.333 N/m2

B. 13.33 N/m2

C. 133.3 N/m2

D. 1333 N/m2

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4

In an irreversible process, there is a

A. Loss of heat

B. No loss of heat

C. Gain of heat

D. No gain of heat

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4

The general law for the expansion or compression of gases, is

A. pv = C

B. pv = m R T

C. pvn = C

D. pvγ = C

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4

When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as

A. Thermodynamic law

B. Thermodynamic process

C. Thermodynamic cycle

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

The universal gas constant (or molar constant) of a gas is the product of

A. Molecular mass of the gas and the gas constant

B. Atomic mass of the gas and the gas constant

C. Molecular mass of the gas and the specific heat at constant pressure

D. Molecular mass of the gas and the specific heat at constant volume

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4

Second law of thermodynamics defines

A. Heat

B. Work

C. Internal energy

D. Entropy

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4

A molecule consisting of one atom is known as

A. Mono-atomic

B. Di-atomic

C. Tri-atomic

D. Poly-atomic

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4

The value of specific heat at constant pressure (cp) is __________ that of at constant volume (cv).

A. Less than

B. Equal to

C. More than

D. None of these

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4

The entropy may be expressed as a function of

A. Pressure and temperature

B. Temperature and volume

C. Heat and work

D. All of these

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4

In the below figure, the plastic range occurs

A. Before point A

B. Beyond point A

C. Between points A and D

D. Between points D and E

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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 natural solid fuel is

A. Wood

B. Coke

C. Anthracite coal

D. Pulverised coal

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4

One kg of carbon produces __________ kg of carbon dioxide.

A. 3/7

B. 7/3

C. 11/3

D. 3/11