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4

The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that

A. Carnot cycle can't work with saturated steam

B. Heat is supplied to water at temperature below the maximum temperature of the cycle

C. A Rankine cycle receives heat at two places

D. Rankine cycle is hypothetical

Correct Answer :

B. Heat is supplied to water at temperature below the maximum temperature of the cycle


Related Questions

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4

A close cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.

A. Same

B. Lower

C. Higher

D. None of these

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4

The value of shear stress which is induced in the shaft due to the applied couple varies

A. From maximum at the centre to zero at the circumference

B. From zero at the centre to maximum at the circumference

C. From maximum at the centre to minimum at the circumference

D. From minimum at the centre to maximum at the circumference

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4

The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and recondensed, then the liquid with the next higher boiling point is then evaporated and recondensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called

A. Cracking

B. Carbonisation

C. Fractional distillation

D. Full distillation

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4

The ratio of elongation in a prismatic bar due to its own weight (W) as compared to another similar bar carrying an additional weight (W) will be

A. 1 : 2

B. 1 : 3

C. 1 : 4

D. 1 : 2.5

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4

For riveting, the size of hole drilled in plates is __________ shank diameter of rivet.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

Carnot cycle consists of

A. Two constant volume and two isentropic processes

B. Two isothermal and two isentropic processes

C. Two constant pressure and two isentropic processes

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

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4

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. mR (T2 - T1)

B. mcv (T2 - T1)

C. mcp (T2 - T1)

D. mcp (T2 + T1)

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4

Which of the following statement is incorrect?

A. The liquid fuels have higher calorific value than solid fuels

B. The solid fuels have higher calorific value than liquid fuels

C. A good fuel should have low ignition point

D. The liquid fuels consist of hydrocarbons

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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

One molecule of oxygen consists of __________ atoms of oxygen.

A. 2

B. 4

C. 8

D. 16

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4

Two shafts 'A' and 'B' transmit the same power. The speed of shaft 'A' is 250 r.p.m. and that of shaft 'B' is 300 r.p.m.

A. The shaft 'B' has the greater diameter

B. The shaft 'A' has the greater diameter

C. Both are of same diameter

D. None of these

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4

Mond 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 materials which exhibit the same elastic properties in all directions are called

A. Homogeneous

B. Inelastic

C. Isotropic

D. Isentropic

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4

Which of the following is an intensive property of a thermodynamic system?

A. Volume

B. Temperature

C. Mass

D. Energy

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4

The entropy __________ in an irreversible cyclic process.

A. Remains constant

B. Decreases

C. Increases

D. None of these

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4

A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be

A. Same

B. Double

C. Half

D. One-fourth

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4

The absolute zero temperature is taken as

A. -273°C

B. 73°C

C. 237°C

D. -237°C

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4

When a thin cylindrical shell is subjected to an internal pressure, the volumetric strain is (where ε₁ = Hoop strain, and ε₂ = Longitudinal strain)

A. 2ε₁ - ε₂

B. 2ε₁ + ε₂

C. 2ε₂ - ε₁

D. 2ε₂ + ε₁

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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

The isothermal and adiabatic processes are regarded as

A. Reversible process

B. Irreversible process

C. Reversible or irreversible process

D. None of these

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4

The amount of heat required to raise the temperature of __________ water through one degree is called kilojoules.

A. 1 g

B. 10 g

C. 100 g

D. 1000 g

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4

The lower layer of the beam as shown in the below figure, will be

A. In tension

B. In compression

C. Neither in tension nor in compression

D. None of these

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4

The extremeties of any diameter on Mohr's circle represent

A. Principal stresses

B. Normal stresses on planes at 45°

C. Shear stresses on planes at 45°

D. Normal and shear stresses on a plane

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4

For a beam, as shown in the below figure, the deflection at C is (where E = Young's modulus for the beam material, and I = Moment of inertia of the beam section.

A. Wl3/48 EI

B. Wa²b²/3EIl

C. [Wa/(a√3) x EIl] x (l² - a²)3/2

D. 5Wl3/384 EI

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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

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

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

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4

A riveted joint in which the number otrivets decrease from innermost to outer most rows is called

A. Chain riveted joint

B. Diamond riveted joint

C. Crisscross riveted joint

D. Zigzag riveted joint

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4

The amount of heat generated per kg of fuel is known as

A. Calorific value

B. Heat energy

C. Lower calorific value

D. Higher calorific value

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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