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Question 1

1A definite area or space where some thermodynamic process takes place is
known as
A. Thermodynamic system
B. Thermodynamic cycle
C. Thermodynamic process
D. thermodynamic law.

Answer 1

A. Thermodynamic system

Question 2

2An open system is one in which
A. Heat and work cross the boundary of the system, but the mass of the working
substance does not
B. Mass of working substance crosses the boundary of the system but the heat and
work do not
C. Both the heat and work as well as mass of the working substances cross the
boundary of the system
D. Neither the heat and work nor the mass of the working substances cross the
boundary of the system.

Answer 2

C. Both the heat and work as well as mass of the working substances cross the
boundary of the system

Question 3

3An isolated system
a specified region where transfer of energy and/or mass takes place
Is a region of constant mass and only energy is allowed to cross the boundaries.
Cannot transfer either energy or mass to or from the surroundings
Is one in which mass within the system is not necessarily constant

Answer 3

Cannot transfer either energy or mass to or from the surroundings

Question 4

4In an extensive property of a thermodynamic system
Extensive heat is transferred
extensive work is done
all of the above
None of these
Is

Answer 4

None of these

Question 5

5Which of the following is an intensive property of a thermodynamic system?
Volume
Temperature
Mass
Energy

Answer 5

Temperature

Question 6

6Which of the following is the extensive property of a thermodynamic system?
Pressure
Volume
Temperature
Density.

Answer 6

Volume

Question 7

7When two bodies are in thermal equilibrium with a third body they are also in
thermal equilibrium with each other. This statement is called
Zeroth law of thermodynamics
First law of thermodynamics
Second law of thermodynamics
Kelvin Planck’s law

Answer 7

Zeroth law of thermodynamics

Question 8

8The temperature at which the volume of a gas becomes zero is called
Absolute scale of temperature
absolute zero temperature
Absolute temperature
none of the above.

Answer 8

absolute zero temperature

Question 9

9The value of one bar (in SI units) is equal to
100 N/m2
1000 N/m2
1 x 104 N/m2
1 × 105 N/m2

Answer 9

1 × 105 N/m2

Question 10

10The absolute zero pressure will be
When molecular momentum of the system becomes zero
At sea level
At the temperature of -273 K
under vacuum conditions

Answer 10

When molecular momentum of the system becomes zero

Question 11

11Absolute zero temperature is taken as
-273°C
273°C
237°C
-373°C.

Answer 11

-273°C

Question 12

12Which of the following is correct?
Absolute pressure gauge pressure + atmospheric pressure
Gauge pressure = absolute pressure + atmospheric pressure
Atmospheric pressure absolute pressure + gauge pressure
Absolute pressure gauge pressure - atmospheric pressure.

Answer 12

Absolute pressure gauge pressure + atmospheric pressure

Question 13

13The unit of energy in SI units is
Joule (J)
Joule meter (Jm)
Watt (W)
Joule/meter (J/m).

Answer 13

Joule (J)

Question 14

140ne watt is equal to
1 Nm/s
1 N/min
10 N/s
100 Nm/s

Answer 14

1 Nm/s

Question 15

150ne joule (J) is equal to
1 Nm
1kNm
10 Nm/s
10 kNm/s.

Answer 15

1 Nm

Question 16

16The amount of heat required to raise the temperature of 1 kg of water
through 1°C is called
Specific heat at constant volume
specific heat at constant pressure
Kilo calorie
none of the above.

Answer 16

Kilo calorie

Question 17

17The heating and expanding of a gas is called
Thermodynamic system
Thermodynamic cycle
Thermodynamic process
Thermodynamic law.

Answer 17

Thermodynamic cycle

Question 18

18A series of operations, which take place in a certain order and restore the
initial condition, is known as
Reversible cycle
irreversible cycle
Thermodynamic cycle
none of the above.

Answer 18

Thermodynamic cycle

Question 19

19The condition for the reversibility of a cycle is
All the processes, taking place in the cycle of operation, must be extremely slow
The working parts of the engine must be friction free
There should be no loss of energy during the cycle of operation
All of the above.

Answer 19

All of the above.

Question 20

20In an irreversible process, there is a
Loss of heat
no loss of heat
gain of heat
no gain of heat.

Answer 20

Loss of heat

Question 21

21The main cause of the irreversibility is
Mechanical and fluid friction
unrestricted expansion
Heat transfer with a finite temperature difference
all of the above

Answer 21

all of the above

Question 22

24lf all the variables of a stream are independent of time it is said to be in
Steady flow
unsteady flow
uniform flow
closed flow

Answer 22

Steady flow

Question 23

25A control volume refers to
A fixed region in space
a specified mass
An isolated system
a reversible process only

Answer 23

A fixed region in space