Thermo

Question 1

Which law is the basis for the manufacture of thermometers?

a. Boyle’s Law
b. Raoult’s Law
c. Zeroth Law of Thermodynamics
d. Carnot’s Principle

Answer 1

C

Question 2

Energy is added to the water as work but is extracted from the water as heat was performed by

a. Van ness
b. Fitzer
c. Joule
d. Smith

Answer 2

C

Question 3

20. Which of the following statement is correct?
    a. The standard heat of formation of an element is negative.
    b. Since AH = AU + APV and can never be equal to AU.
    c. Q and W are state functions.
    d. Q + W is a state function.

Answer 3

D

Question 4

Equation which relates pressure, volume, and temperature of a gas is called
a. Equation of state
b. ideal gas equation
c. Gibbs Duhem equation
d. all of these

Answer 4

A

Question 5

The equation, PV = nRT is best obeyed by gases at
a. low pressure and high temperature
b. high pressure and low temperature
c. low pressure and low temperature
d. high pressure and high temperature

Answer 5

A

Question 6

Compressibility factor of a gas is
a. not a function of pressure
b. not a function of its nature
c. not a function of its temperature
d. unity, if it follows PV = nRT

Answer 6

D

Question 7

Cp - Cv = R is valid for
a. ideal gases
b. all gases
c. gases at very high pressure
d. gases at a very low temperature

Answer 7

A

Question 8

For monoatomic gases, Cp / Cv equals

A. 1.0
B. 1.4
C. 1.3
D. 1.67

Answer 8

D

Question 9

Isobaric process means a constant
a. temperature process
b. volume process
c. pressure process
d. entropy process

Answer 9

C

Question 10

For an isothermal process the internal energy of a gas
a. increases
b. decreases
c. remains unchanged
d. data insufficient can’t be predicted

Answer 10

C

Question 11

From PVn = C, when n = 0, the process is

a. isochoric
b. isothermal
c. polytropic
d. isobaric

Answer 11

D

Question 12

From PVn = C, the process is isochoric if n equals

a. 0
b. б
с. 1
d. ∞

Answer 12

D

Question 13

In an adiabatic process
a. heat transfer is zero
b. temperature change is zero
c. work done is a path function
d. enthalpy remains constant

Answer 13

A

Question 14

A solid is transformed into vapor without going through the liquid phase at

a. below triple point
b. boiling point
c. triple point
d. always

Answer 14

C

Question 15

Work output of turbine is _ the work input to the pump
a. less than
b. equal to
c. greater than
d. less than or greater than

Answer 15

C

Question 16

The efficiency of carnot cycle is ____ the eff of rankine cycle

A. Less than
B. Greater than
C. Equal to
D. Less than or greater than

Answer 16

B

Question 17

The losses in condenser are

a. small
b. large
c. always constant
d. none of these

Answer 17

A