The value of cp/cv for air is

Question

The value of cp/cv for air is

A. 1

B. 1.4

C. 1.45

D. 2.3

Correct Answer :

B. 1.4

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The natural solid fuel is

A. Wood

B. Coke

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A coil is cut into two halves, the stiffness of cut coil will be

A. Double

B. Half

C. Same

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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. 0°

B. 30°

C. 45°

D. 90°

Discuss this answer

The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called

Discuss this answer

The temperature at which the volume of a gas becomes zero is called

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

C. Middle

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The state of a substance whose evaporation from its liquid state is complete, is known as

A. Vapour

C. Air

D. Steam

Discuss this answer

For same compression ratio and for same heat added

Discuss this answer

According to Kelvin-Planck's statement of second law of thermodynamics,

Discuss this answer

Which of the following statement is wrong?

Discuss this answer

When a body is subjected to biaxial stress i.e. direct stresses (σ_x) and (σ_y) in two mutually perpendicular planes accompanied by a simple shear stress (τ_xy), then maximum normal stress is

Discuss this answer

The buckling load for a given material depends on

Discuss this answer

Tensile strength of a material is obtained by dividing the maximum load during the test by the

Discuss this answer

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

Discuss this answer

The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld, and σt = Allowable tensile stress for weld metal)

Discuss this answer

The entropy of water at 0°C is assumed to be

A. 1

B. 0

C. -1

D. 10

Discuss this answer

The work ratio of a gas turbine plant is given by

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For which material the Poisson's ratio is more than unity

A. Steel

B. Copper

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The mass of flue gas per kg of fuel is the ratio of the

Discuss this answer

True stress strain-curve for materials is plotted between

Discuss this answer

In S. I. units, the value of the universal gas constant is

Discuss this answer

The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as

Discuss this answer

Impact strength of a material is an index of its

Discuss this answer

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

Discuss this answer

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)

Discuss this answer

According to Avogadro's law

Discuss this answer

In a reversible adiabatic process, the ratio of T1/T2 is equal to

Discuss this answer

The energy absorbed in a body, when it is strained within the elastic limits, is known as

Discuss this answer

A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is

B. -80 kJ

C. -40 kJ

D. +60 kJ

Discuss this answer

The energy stored in a body when strained within elastic limit is known as

Discuss this answer

Answer 1

C. Anthracite coal

Answer 2

D. Pulverised coal

Answer 3

D. None of these

Answer 4

A. Specific heat at constant volume

Answer 5

B. Specific heat at constant pressure

Answer 6

C. kilo-Joule

Answer 7

D. None of these

Answer 8

A. Absolute scale of temperature

Answer 9

B. Absolute zero temperature

Answer 10

C. Absolute temperature

Answer 11

D. None of these

Answer 12

A. Smaller end

Answer 13

B. Larger end

Answer 14

D. Anywhere

Answer 15

B. Perfect gas

Answer 16

A. Otto cycle is more efficient than Diesel cycle

Answer 17

B. Diesel cycle is more efficient than Otto cycle

Answer 18

C. Efficiency depends on other factors

Answer 19

D. Both Otto and Diesel cycles are equally efficient

Answer 20

A. It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

Answer 21

B. It is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

Answer 22

C. It is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body

Answer 23

D. None of the above

Answer 24

A. The deformation of the bar per unit length in the direction of the force is called linear strain.

Answer 25

B. The Poisson's ratio is the ratio of lateral strain to the linear strain.

Answer 26

C. The ratio of change in volume to the original volume is called volumetric strain.

Answer 27

D. The bulk modulus is the ratio of linear stress to the linear strain.

Answer 28

A. (σ_x + σ_y)/2 + (1/2) × √[(σ_x - σ_y)² + 4 τ²_xy]

Answer 29

B. (σ_x + σ_y)/2 - (1/2) × √[(σ_x - σ_y)² + 4 τ²_xy]

Answer 30

C. (σ_x - σ_y)/2 + (1/2) × √[(σ_x + σ_y)² + 4 τ²_xy]

Answer 31

D. (σ_x - σ_y)/2 - (1/2) × √[(σ_x + σ_y)² + 4 τ²_xy]

Answer 32

A. Slenderness ratio and area of cross-section

Answer 33

B. Poisson's ratio and modulus of elasticity

Answer 34

C. Slenderness ratio and modulus of elasticity

Answer 35

D. Slenderness ratio, area of cross-section and modulus of elasticity

Answer 36

A. Area at the time of fracture

Answer 37

B. Original cross-sectional area

Answer 38

C. Average of (A) and (B)

Answer 39

D. Minimum area after fracture

Answer 40

A. Wl3 / 48EI

Answer 41

B. 5Wl3 / 384EI

Answer 42

C. Wl3 / 392EI

Answer 43

D. Wl3 / 384EI

Answer 44

A. 0.5 s.l.σ_t

Answer 45

B. s.l.σ_t

Answer 46

C. √2 s.l.σ_t

Answer 47

D. 2.s.l.σt

Answer 48

A. (Net work output)/(Workdone by the turbine)

Answer 49

B. (Net work output)/(Heat supplied)

Answer 50

C. (Actual temperature drop)/(Isentropic temperature drop)

Answer 51

D. (Isentropic increase in temperature)/(Actual increase in temperature)

Answer 52

C. Aluminium

Answer 53

D. None of the above

Answer 54

A. Mass of oxygen in 1 kg of flue gas to the mass of oxygen in 1 kg of fuel

Answer 55

B. Mass of oxygen in 1 kg of fuel to the mass of oxygen in 1 kg of flue gas

Answer 56

C. Mass of carbon in 1 kg of flue gas to the mass of carbon in 1 kg of fuel

Answer 57

D. Mass of carbon in 1 kg of fuel to the mass of carbon in 1 kg of flue gas

Answer 58

A. Load/original cross-sectional area and change in length/original length

Answer 59

B. Load/ instantaneous cross-sectional area and loge (original area/ instantaneous area)

Answer 60

C. Load/ instantaneous cross-sectional area and change in length/ original length

Answer 61

D. Load/ instantaneous area and instantaneous area/original area

Answer 62

A. 8.314 J/kg mole-K

Answer 63

B. 83.14 J/kgmole-K

Answer 64

C. 831.4 J/kgmole-K

Answer 65

D. 8314 J/kgmole-K

Answer 66

A. Dual combustion cycle

Answer 67

B. Diesel cycle

Answer 68

C. Atkinson cycle

Answer 69

D. Rankine cycle

Answer 70

A. Toughness

Answer 71

B. Tensile strength

Answer 72

C. Capability of being cold worked

Answer 73

D. Hardness

Answer 74

A. Isothermal

Answer 75

B. Isentropic

Answer 76

C. Polytropic

Answer 77

D. None of these

Answer 78

A. mR (T₂ - T₁)

Answer 79

B. mc_v (T₂ - T₁)

Answer 80

C. mc_p (T₂ - T₁)

Answer 81

D. mc_p (T₂ + T₁)

Answer 82

A. The product of the gas constant and the molecular mass of an ideal gas is constant

Answer 83

B. The sum of partial pressure of the mixture of two gases is sum of the two

Answer 84

C. Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules

Answer 85

D. All of the above

Answer 86

A. (p₂/p₁)γ - 1/ γ

Answer 87

B. (p₁/p₂)γ - 1/ γ

Answer 88

C. (v₂/v₁)γ - 1/ γ

Answer 89

D. (v₁/v₂)γ - 1/ γ

Answer 90

A. Strain energy

Answer 91

B. Resilience

Answer 92

C. Proof resilience

Answer 93

D. Modulus of resilience

Answer 94

A. -140 kJ

Answer 95

A. Resilience

Answer 96

B. Proof resilience

Answer 97

C. Strain energy

Answer 98

D. Impact energy

The value of cp/cv for air is

Correct Answer :

Show all Strength of Materials MCQ

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A coil is cut into two halves, the stiffness of cut coil will be

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.

The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called

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True stress strain-curve for materials is plotted between

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

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The value of cp/cv for air is

Correct Answer :

Show all Strength of Materials MCQ

Related Questions

The natural solid fuel is

A coil is cut into two halves, the stiffness of cut coil will be

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.

The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called

The temperature at which the volume of a gas becomes zero is called

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

The state of a substance whose evaporation from its liquid state is complete, is known as

For same compression ratio and for same heat added

According to Kelvin-Planck's statement of second law of thermodynamics,

Which of the following statement is wrong?

When a body is subjected to biaxial stress i.e. direct stresses (σx) and (σy) in two mutually perpendicular planes accompanied by a simple shear stress (τxy), then maximum normal stress is

The buckling load for a given material depends on

Tensile strength of a material is obtained by dividing the maximum load during the test by the

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

The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld, and σt = Allowable tensile stress for weld metal)

The entropy of water at 0°C is assumed to be

The work ratio of a gas turbine plant is given by

For which material the Poisson's ratio is more than unity

The mass of flue gas per kg of fuel is the ratio of the

True stress strain-curve for materials is plotted between

In S. I. units, the value of the universal gas constant is

The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as

Impact strength of a material is an index of its

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

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)

According to Avogadro's law

In a reversible adiabatic process, the ratio of T1/T2 is equal to

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A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is

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When a body is subjected to biaxial stress i.e. direct stresses (σ_x) and (σ_y) in two mutually perpendicular planes accompanied by a simple shear stress (τ_xy), then maximum normal stress is

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)