In a free expansion process,

Question

In a free expansion process,

A. W_{1 - 2} = 0

B. Q_{1 - 2} = 0

C. dU = 0

D. All of these

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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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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

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The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will

A. Increase

B. Decrease

C. Remain unchanged

D. Increase/decrease depending on application

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The heat supplied to the gas at constant volume is (where m = Mass of gas, c_v = Specific heat at constant volume, c_p = Specific heat at constant pressure, T₂ - T₁ = Rise in temperature, and R = Gas constant)

A. mR (T₂ - T₁)

B. mc_v (T₂ - T₁)

C. mc_p (T₂ - T₁)

D. mc_p (T₂ + T₁)

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A cantilever beam is one which is

A. Fixed at both ends

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

C. Supported at its ends

D. Supported on more than two supports

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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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Strain re-setters are used to

A. Measure shear strain

B. Measure linear strain

C. Measure volumetric strain

D. Relieve strain

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In an isothermal process,

A. There is no change in temperature

B. There is no change in enthalpy

C. There is no change in internal energy

D. All of these

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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 × σ_c

B. (p - d) t × τ

C. (p - d) t × σ_t

D. (2p - d) t × σ_t

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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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The gas constant (R) is equal to the

A. Sum of two specific heats

B. Difference of two specific heats

C. Product of two specific heats

D. Ratio of two specific heats

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The extension of a circular bar tapering uniformly from diameter d₁ at one end to diameter d₂ at the other end and subjected to an axial pull of P is given by

A. δl = 4PE/ πl²

B. δl = 4πld²/PE

C. δl = 4Pl/πEd₁d₂

D. δl = 4PlE/ πd₁d₂

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The fuel mostly used in steam boilers is

A. Brown coal

B. Peat

C. Coking bituminous coal

D. Non-coking bituminous coal

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The efficiency of Diesel cycle approaches to Otto cycle efficiency when

A. Cut-off is increased

B. Cut-off is decreased

C. Cut-off is zero

D. Cut-off is constant

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The torsional rigidity of a shaft is expressed by the

A. Maximum torque it can transmit

B. Number of cycles it undergoes before failure

C. Elastic limit up to which it resists torsion, shear and bending stresses

D. Torque required to produce a twist of one radian per unit length of shaft

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The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by

A. Boyle's law

B. Charles' law

C. Gay-Lussac law

D. All of these

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An isothermal process is governed by

A. Boyle's law

B. Charles' law

C. Gay-Lussac law

D. Avogadro's law

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The maximum stress produced in a bar of tapering section is at

A. Smaller end

B. Larger end

C. Middle

D. Anywhere

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During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm². Ultimate tensile strength of specimen is

A. 4 tonnes/ cm²

B. 8 tonnes/ cm²

C. 16 tonnes/ cm²

D. 22 tonnes/ cm²

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One molecule of oxygen consists of __________ atoms of oxygen.

A. 2

B. 4

C. 8

D. 16

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Modulus of rigidity may be defined as the ratio of

A. Linear stress to lateral strain

B. Lateral strain to linear strain

C. Linear stress to linear strain

D. Shear stress to shear strain

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Otto cycle consists of

A. Two constant volume and two isentropic processes

B. Two constant pressure and two isentropic processes

C. Two constant volume and two isothermal processes

D. One constant pressure, one constant volume and two isentropic processes

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For the same compression ratio, the efficiency of dual combustion cycle is

A. Greater than Diesel cycle and less than Otto cycle

B. Less than Diesel cycle and greater than Otto cycle

C. Greater than Diesel cycle

D. Less than Diesel cycle

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In order to prevent crushing of masonry at the base of the dam, the maximum stress should be __________ the permissible stress of the soil.

A. Equal to

B. Less than

C. More than

D. None of these

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

A. 2

B. 8

C. 16

D. 32

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The atomic mass of sulphur is

A. 12

B. 14

C. 16

D. 32

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The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called

A. Specific heat at constant volume

B. Specific heat at constant pressure

C. Kilo Joule

D. None of these

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The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.

A. Boyle's law

B. Charle's law

C. Gay-Lussac law

D. Joule's law

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The change in the unit volume of a material under tension with increase in its Poisson's ratio will

A. Increase

B. Decrease

C. Remain same

D. Increase initially and then decrease

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Principal planes are planes having

A. Maximum shear stress

B. No shear stress

C. Minimum shear stress

D. None of the above

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Accepted Answer

D. All of these

In a free expansion process,

Correct Answer :

Show all Strength of Materials MCQ

Related Questions

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

A column is said to be a short column, when

The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will

The heat supplied to the gas at constant volume is (where m = Mass of gas, c_v = Specific heat at constant volume, c_p = Specific heat at constant pressure, T₂ - T₁ = Rise in temperature, and R = Gas constant)

A cantilever beam is one which is

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

Strain re-setters are used to

In an isothermal process,

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)

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

The gas constant (R) is equal to the

The extension of a circular bar tapering uniformly from diameter d₁ at one end to diameter d₂ at the other end and subjected to an axial pull of P is given by

The fuel mostly used in steam boilers is

The efficiency of Diesel cycle approaches to Otto cycle efficiency when

The torsional rigidity of a shaft is expressed by the

The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by

An isothermal process is governed by

The maximum stress produced in a bar of tapering section is at

During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm². Ultimate tensile strength of specimen is

One molecule of oxygen consists of __________ atoms of oxygen.

Modulus of rigidity may be defined as the ratio of

Otto cycle consists of

For the same compression ratio, the efficiency of dual combustion cycle is

In order to prevent crushing of masonry at the base of the dam, the maximum stress should be __________ the permissible stress of the soil.

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

The atomic mass of sulphur is

The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called

The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.

The change in the unit volume of a material under tension with increase in its Poisson's ratio will

Principal planes are planes having

Also checkout

In a free expansion process,

Correct Answer :

Show all Strength of Materials MCQ

Related Questions

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

A column is said to be a short column, when

The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will

The heat supplied to the gas at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 - T1 = Rise in temperature, and R = Gas constant)

A cantilever beam is one which is

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

Strain re-setters are used to

In an isothermal process,

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)

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

The gas constant (R) is equal to the

The extension of a circular bar tapering uniformly from diameter d₁ at one end to diameter d₂ at the other end and subjected to an axial pull of P is given by

The fuel mostly used in steam boilers is

The efficiency of Diesel cycle approaches to Otto cycle efficiency when

The torsional rigidity of a shaft is expressed by the

The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by

An isothermal process is governed by

The maximum stress produced in a bar of tapering section is at

During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm². Ultimate tensile strength of specimen is

One molecule of oxygen consists of __________ atoms of oxygen.

Modulus of rigidity may be defined as the ratio of

Otto cycle consists of

For the same compression ratio, the efficiency of dual combustion cycle is

In order to prevent crushing of masonry at the base of the dam, the maximum stress should be __________ the permissible stress of the soil.

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

The atomic mass of sulphur is

The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called

The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.

The change in the unit volume of a material under tension with increase in its Poisson's ratio will

Principal planes are planes having

Also checkout

The heat supplied to the gas at constant volume is (where m = Mass of gas, c_v = Specific heat at constant volume, c_p = Specific heat at constant pressure, T₂ - T₁ = Rise in temperature, and R = Gas constant)