ENGINEERING THERMODYNAMICS QUIZ

The fuel mostly used in steam boilers is

Non-coking bituminous coal

Coking bituminous coal

Peat

Brown coal

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The following cycle is used for air craft refrigeration

Brayton cycle

Carnot cycle

Reversed Brayton cycle

Joule cycle

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A gas is compressed in a cylinder by a movable piston to a volume one half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be

300,000 Nm

300 Nm

30 Nm

3000 Nm

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Absolute zero pressure will occur

At a temperature of 273°K

At sea level

Under vacuum conditions

When molecular momentum of the system becomes zero

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

(p2/p1)γ - 1/ γ

(v1/v2)γ - 1/ γ

(v2/v1)γ - 1/ γ

(p1/p2)γ - 1/ γ

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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

Specific heat at constant pressure

Kilo Joule

Specific heat at constant volume

None of these

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The value of gas constant (R) in S. I. units is

2.87 J/kgK

28.7 J/kgK

287 J/kgK

0.287 J/kgK

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First law of thermodynamics deals with

Conservation of mass

Conservation of heat

Conservation of momentum

Conservation of energy

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The efficiency of a Carnot engine depends on

Size of engine

Design of engine

Temperatures of source and sink

Working substance

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For which of the following substances, the gas laws can be used with minimum error

Wet steam

Dry steam

Superheated steam

Saturated steam

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