Mechanical Engineering MCQs

2075 MCQs  (Page 90 of 208)

Attempt Mechanical Engineering Mcqs Quiz
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___________________?
A. 300 nm
B. 300,000 nm
C. 30 nm
D. 3000 nm
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Entropy change depends on___________________?
A. Heat transfer
B. Mass transfer
C. Change of temperature
D. Thermodynamic state
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Energy can neither be created nor destroyed but can be converted from one form to other is inferred from_________________?
A. Zeroth low of thermodynamic
B. First law of thermodynamics
C. Second law to thermodynamics
D. Basic law of thermodynamics
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Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant________________?
A. Pressure
B. Temperature
C. Volume
D. Internal energy
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Isochoric process is one in which___________________?
A. Free expansion takes place
B. Very little mechanical work is done by the system
C. No mechanical work is done by the system
D. All parameters remain constant
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Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant_______________?
A. Pressure
B. Temperature
C. Volume
D. Internal energy
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Total heat of a substance is also known as __________________?
A. Internal energy
B. Entropy
C. Thermal capacity
D. Enthalpy
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Addition of heat at constant pressure to a gas results in________________?
A. Raising its temperature
B. Raising its pressure
C. Raising its volume
D. Raising its temperature and doing external work
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Measurement of temperature is based on_________________?
A. Thermodynamic properties
B. Zeroth law of thermodynamics
C. First law of thermodynamics
D. Second law of thermodynamics
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Carnot cycle efficiency is maximum when______________?
A. Initial temperature is 0°k
B. Final temperature is 0°k
C. Difference between initial and final temperature is 0°k
D. Final temperature is 0°c
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Word of the Day
28 Sep
Expatriate
a person who lives outside their native country.
ملک بدری، جلا وطن کرن، شہر بدر کرنا

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