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4

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

A. Otto cycle

B. Ericsson cycle

C. Joule cycle

D. Stirling cycle

Correct Answer :

C. Joule cycle


Related Questions

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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

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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4

The hard coke is obtained when carbonisation of coal is carried out at

A. 300° to 500°C

B. 500° to 700°C

C. 700° to 900°C

D. 900° to 1100°C

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4

The section modulus of a circular section about an axis through its C.G., is

A. πd²/4

B. πd²/16

C. πd3/16

D. πd3/32

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4

When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.

A. Zero

B. 1/5

C. 4/5

D. 1

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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

Which of the following is an irreversible cycle?

A. Carnot

B. Stirling

C. Ericsson

D. None of the above

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4

Which of the following has the minimum atomic mass?

A. Oxygen

B. Sulphur

C. Nitrogen

D. Carbon

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4

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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4

Flow stress corresponds to

A. Fluids in motion

B. Breaking point

C. Plastic deformation of solids

D. Rupture stress

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4

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

A. Th > Ts

B. Th < Ts

C. Th = Ts

D. None of these

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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

Select the wrong statement

A. A Joule cycle consists of two constant volume and two isentropic processes.

B. An Otto cycle consists of two constant volume and two isentropic processes.

C. An Ericsson cycle consists of two constant pressure and two isothermal processes.

D. All of the above

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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

If percentage reduction in area of a certain specimen made of material 'A' under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material 'B' is 40%, then

A. The material A is more ductile than material B

B. The material B is more ductile than material A

C. The ductility of material A and B is equal

D. The material A is brittle and material B is ductile

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4

Diamond riveted joint can be adopted in the case of following type of joint

A. Butt joint

B. Lap joint

C. Double riveted lap joints

D. All types of joints

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4

The buckling load for a given column depends upon

A. Area of cross-section of the column

B. Length and least radius of gyration of the column

C. Modulus of elasticity for the material of the column

D. All of the above

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4

The mass of carbon per kg of flue gas is given by

A. (11/3) CO2 + (3/7) CO

B. (3/7) CO2 + (11/3) CO

C. (7/3) CO2 + (3/11) CO

D. (3/11) CO2 + (7/3) CO

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4

The heat and mechanical energies are mutually convertible. This statement was established by

A. Boyle

B. Charles

C. Joule

D. None of these

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4

The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight

A. Of same magnitude as that of bar and applied at the lower end

B. Half the weight of bar applied at lower end

C. Half of the square of weight of bar applied at lower end

D. One fourth of weight of bar applied at lower end

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4

The efficiency of a gas turbine is given by

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

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

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

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

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4

During which of the following process does heat rejection takes place in Carnot cycle?

A. Isothermal expansion

B. Isentropic expansion

C. Isothermal compression

D. Isentropic compression

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4

In a tensile test, near the elastic limit zone, the

A. Tensile strain increases more quickly

B. Tensile strain decreases more quickly

C. Tensile strain increases in proportion to the stress

D. Tensile strain decreases in proportion to the stress

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4

Strain is equal to (where l = Original length, and δl = Change in length)

A. l/δl

B. δl/l

C. l.δl

D. l + δl

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4

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

A. -140 kJ

B. -80 kJ

C. -40 kJ

D. +60 kJ

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4

Resilience is the

A. Energy stored in a body when strained within elastic limits

B. Energy stored in a body when strained up to the breaking of the specimen maximum strain

C. Energy which can be stored in a body

D. None of the above

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4

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

A. 1

B. 0

C. -1

D. 10

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4

Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the un-punched plate in

A. Tension

B. Compression

C. Bearing

D. Any one of the above

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4

The point of contra flexure is a point where

A. Shear force changes sign

B. Shear force is maximum

C. Bending moment changes sign

D. Bending moment is maximum

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4

When shear force at a point is zero, then bending moment is _________ at that point.

A. Zero

B. Minimum

C. Maximum

D. Infinity