Mechanical Engineering MCQs

2075 MCQs (Page 97 of 208)

Attempt Mechanical Engineering Mcqs Quiz

Universal gas constant is defined as equal to product of the molecular weight of the gas and_______________?

A. Specific heat at constant pressure
B. Specific heat at constant volume
C. Ratio of two specific heats
D. Gas constant

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The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is______________________?

A. 29.27 kgfm/mol°k
B. 8314kgfm/mol°k
C. 848kgfm/mol°k
D. 427kgfm/mol°k

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

A. Dry steam
B. Wet steam
C. Saturated steam
D. Superheated steam

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One watt is equal to__________________?

A. 1 nm/s
B. 1 n/mt
C. 1 nm/hr
D. 1 knm/hr

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If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be__________________?

A. 80°c
B. 0°c
C. 40°c
D. 20°c

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In an isothermal process, the internal energy of gas molecules________________?

A. Increases
B. Decreases
C. Remains constant
D. May increase/decrease depending on the properties of gas

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The term N.T.P. stands for________________________?

A. Nominal temperature and pressure
B. Natural temperature and pressure
C. Normal temperature and pressure
D. Normal thermodynamic practice

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The index of compression n tends to reach ratio of specific heats y when____________________?

A. Flow is uniform and steady
B. Process is isentropic
C. Process is isothermal
D. Process is isentropic and specific heat does not change with temperature

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Solids and liquids have___________________?

A. One value of specific heat (ft) two values of specific heat
C. Three values of specific heat
D. No value of specific heat
E. One value under some conditions and two values under other conditions

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Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure___________________?

A. Enthalpy
B. Volume
C. Mass
D. Entropy

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