Mechanical Engineering MCQs

2075 MCQs (Page 88 of 208)

Attempt Mechanical Engineering Mcqs Quiz

Mixture of ice and water form a________________________?

A. Closed system
B. Open system
C. Isolated system
D. Heterogeneous system

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On weight basis, air contains following parts of oxygen_________________?

A. 21
B. 23
C. 25
D. 73

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Which of the following items is not a path function ____________________?

A. heat
B. work
C. kinetic energy
D. vdp

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Heat and work are ____________________?

A. Point functions
B. System properties
C. Path functions
D. Intensive properties

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The value of n = 1 in the poly tropic process indicates it to be __________________?

A. Reversible process
B. Isothermal process
C. Adiabatic process
D. Irreversible process

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A perfect gas at 27°C is heated at constant pressure till its volume is double. The final temperature is________________?

A. 54°c
B. 327°c
C. 108°c
D. 654°c

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If value of n is infinitely large in a polytropic process pV” = C, then the process is known as constant_____________________?

A. Volume
B. Pressure
C. Temperature
D. Enthalpy

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Change in enthalpy of a system is the heat supplied at___________________?

A. Constant pressure
B. Constant temperature
C. Constant volume
D. Constant entropy

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A heat exchange process in which the product of pressure and volume remains constant is known as_______________?

A. heat exchange process
B. throttling process
C. isentropic process
D. adiabatic process

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Zeroth law of thermodynamics________________?

A. Deals with conversion of mass and energy
B. Deals with reversibility and irreversibility of process
C. States that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other
D. Deals with heat engines

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