Thermodynamics MCQs | Thermodynamics Multiple Choice Questions and Answers
Questions
1
Which of the following variables controls the physical properties of a perfect gas
Answer: all of the above
2
Which of the following laws is applicable for the behavior of a perfect gas
Answer: all of the above
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4
According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as
Answer: absolute temperature, if volume is kept constant
5
According to Dalton’s law, the total pres sure of the mixture of gases is equal to
Answer: sum of the partial pressures of all
6
Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits.
Answer: 02, N2, H2, air
7
A closed system is one in which
Answer: mass does not cross boundaries of the system, though energy may do so
8
Diesel cycle consists of following four processes
Answer: two isentropics, one constant volume and one constant pressure
9
A cycle consisting of two adiabatics and two constant pressure processes is known as
Answer: Joule cycle
10
Brayton cycle consists’ of following four processes
Answer: two isentropics and two constant pres-sures
11
The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as
Answer: Atkinson cycle
12
The ideal efficiency of a Brayton cycle without regeneration with increase ni pressure ratio will
Answer: increase
13
The following cycle is used for air craft refrigeration
Answer: Reversed-Brayton cycle
14
Gas turbine cycle consists of
Answer: two isentropics and two constant pressures
17
For same compression ratio and for same heat added
Answer: Otto cycle is more efficient than Diesel cycle
18
Otto cycle consists of following four processes
Answer: two isentropics and two constant volumes
20
The first law of thermodynamics is the law of
Answer: conservation of energy
