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Engineering Thermodynamics

Engineering Thermodynamics
Thermal power plant works on

Joule cycle
Otto cycle
Rankine cycle
Carnot cycle

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Engineering Thermodynamics
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

3000 Nm
300,000 Nm
300 Nm
30 Nm

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Engineering Thermodynamics
The general gas energy equation is (where Q1 - 2 = Heat supplied, dU = Change in internal energy, and W1 - 2 = Work done in heat units)

Q1 - 2 = dU + W1 - 2
Q1 - 2 = dU × W1 - 2
Q1 - 2 = dU - W1 - 2
Q1 - 2 = dU/W1 - 2

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Engineering Thermodynamics
The efficiency of Diesel cycle approaches to Otto cycle efficiency when

Cut-off is decreased
Cut-off is zero
Cut-off is constant
Cut-off is increased

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Engineering Thermodynamics
The fuel mostly used in blast furnace for extracting pig iron from iron ores is

Hard coke
Pulverized coal
Bituminous coal
Soft coke

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Engineering Thermodynamics
If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant

Enthalpy
Pressure
Volume
Temperature

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MORE MCQ ON Engineering Thermodynamics

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