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4

The heat energy stored in the gas and used for raising the temperature of the gas is known as

A. External energy

B. Internal energy

C. Kinetic energy

D. Molecular energy

Correct Answer :

B. Internal energy


Related Questions

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4

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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4

A column of length (l) with both ends fixed may be considered as equivalent to a column of length __________ with both ends hinged.

A. l/8

B. l/4

C. l/2

D. l

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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

A column that fails due to direct stress, is called

A. Short column

B. Long column

C. Weak column

D. Medium column

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4

The shape of cantilever for uniformly distributed load will be

A. Straight line

B. Parabolic

C. Elliptical

D. Cubic

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4

The following cycle is used for air craft refrigeration

A. Brayton cycle

B. Joule cycle

C. Carnot cycle

D. Reversed Brayton cycle

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4

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 minimum normal stress is

A. x + σy)/2 + (1/2) × √[(σx - σy)² + 4 τ²xy]

B. x + σy)/2 - (1/2) × √[(σx - σy)² + 4 τ²xy]

C. x - σy)/2 + (1/2) × √[(σx + σy)² + 4 τ²xy]

D. x - σy)/2 - (1/2) × √[(σx + σy)² + 4 τ²xy]

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4

A cycle consisting of two isothermal and two isentropic processes, is known as

A. Carnot cycle

B. Stirling cycle

C. Ericsson cycle

D. Joule cycle

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4

An adiabatic process is one in which

A. No heat enters or leaves the gas

B. The temperature of the gas changes

C. The change in internal energy is equal to the mechanical workdone

D. All of the above

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4

A simply supported beam with a gradually varying load from zero at B and w per unit length at A is shown in the below figure. The shear force at B is equal to

A. wl/6

B. wl/3

C. wl

D. 2wl/3

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4

The thickness of a thin cylindrical shell with hemispherical ends is __________ that of spherical ends.

A. Equal to

B. More than

C. Less than

D. None of these

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4

Stirling cycle consists of

A. Two constant volume and two isentropic processes

B. Two constant volume and two isothermal processes

C. Two constant pressure and two isothermal processes

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

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4

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

A. 11/7

B. 9/7

C. 4/7

D. All of the above

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4

In the below figure, the stress corresponding to point D is

A. Yield point stress

B. Breaking stress

C. Ultimate stress

D. Elastic limit

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4

A shaft revolving at ω rad/s transmits torque (T) in Nm. The power developed is

A. T.ω watts

B. 2π. T.ω watts

C. 2π. T.ω/75 watts

D. 2π. T.ω/4500 watts

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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

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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4

The work ratio of simple gas turbine cycle depends upon

A. Maximum cycle temperature

B. Minimum cycle temperature

C. Pressure ratio

D. All of these

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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

An open system is one in which

A. Heat and work crosses the boundary of the system, but the mass of the working substance does not crosses the boundary of the system

B. Mass of the working substance crosses the boundary of the system but the heat and work does not crosses the boundary of the system

C. Both the heat and work as well as mass of the working substance crosses the boundary of the system

D. Neither the heat and work nor the mass of the working substance crosses the boundary of the system

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4

The gas in cooling chamber of a closed cycle gas turbine is cooled at

A. Constant volume

B. Constant temperature

C. Constant pressure

D. None of these

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4

If the depth is kept constant for a beam of uniform strength, then its width will vary in proportional to

A. Bending moment (i.e. M)

B. Bending moment² (i.e. M²)

C. Bending moment³ (i.e. M³)

D. Bending moment⁴ (i.e. M⁴)

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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

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4

According to First law of thermodynamics,

A. Total internal energy of a system during a process remains constant

B. Total energy of a system remains constant

C. Workdone by a system is equal to the heat transferred by the system

D. Internal energy, enthalpy and entropy during a process remain constant

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4

The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

A. 0.086

B. 1.086

C. 1.086

D. 4.086

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4

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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4

The heat energy stored in the gas and used for raising the temperature of the gas is known as

A. External energy

B. Internal energy

C. Kinetic energy

D. Molecular energy

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4

In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is

A. More

B. Less

C. Same

D. More/less depending on composition

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4

A composite shaft consisting of two stepped portions having spring constants K₁ and K₂ is held between two rigid supports at the ends. Its equivalent spring constant is

A. K₁ K₂

B. (K₁ + K₂)/ 2

C. (K₁ + K₂)/ K₁ K₂

D. K₁ K₂/ (K₁ + K₂)

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4

The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to

A. 0

B. 1

C. γ

D.