Thermodynamics Test Questions - Set 16

1)   Which of the following is not the intensive property___________________?

a. pressure
b. temperature
c. density
d. heat
e. specific volume
Answer  Explanation 

ANSWER: heat

Explanation:
No explanation is available for this question!


2)   Which of the following is the property of a system___________________?

a. pressure and temperature
b. internal energy
c. volume and density
d. enthalpy and entropy
e. all of the above
Answer  Explanation 

ANSWER: all of the above

Explanation:
No explanation is available for this question!


3)   According to Avogadro’s law, for a given pressure and temperature, each molecule of a gas_________________?

a. occupies volume proportional to its molecular weight
b. occupies volume proportional to its specific weight
c. occupies volume inversely proportional to its molecular weight
d. occupies volume inversely proportional to its specific weight
e. occupies same volume
Answer  Explanation 

ANSWER: occupies same volume

Explanation:
No explanation is available for this question!


4)   Properties of substances like pressure, temperature and density, in thermodynamic coordinates are__________________?

a. path functions
b. point functions
c. cyclic functions
d. real functions
e. thermodynamic functions
Answer  Explanation 

ANSWER: point functions

Explanation:
No explanation is available for this question!


5)   If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to__________________?

a. + v
b. – ve
c. zero
d. pressure x volume
e. any where between zero and infinity
Answer  Explanation 

ANSWER: zero

Explanation:
No explanation is available for this question!


6)   The statement that molecular weights of all gases occupy the same volume is known as________________?

a. Avogadro’s hypothesis
b. Dalton’s law
c. Gas law
d. Law of thermodynamics
e. Joule’s law
Answer  Explanation 

ANSWER: Avogadro’s hypothesis

Explanation:
No explanation is available for this question!


7)   Extensive property of a system is one whose value______________________?

a. depends on the mass of the system like volume
b. does not depend on the mass of the system, like temperature, pressure, etc
c. is not dependent on the path followed but on the state
d. is dependent on the path followed and not on the state
e. is always constant
Answer  Explanation 

ANSWER: depends on the mass of the system like volume

Explanation:
No explanation is available for this question!


8)   Gases have___________________?

a. only one value of specific heat
b. two values of specific heat
c. three values of specific heat
d. no value of specific heat
e. under some conditions one value and sometimes two values of specific heat
Answer  Explanation 

ANSWER: two values of specific heat

Explanation:
No explanation is available for this question!


9)   An open system is one in which____________________?

a. mass does not cross boundaries of the system, though energy may do so
b. neither mass nor energy crosses the boundaries of the system
c. both energy and mass cross the boundaries of the system
d. mass crosses the boundary but not the energy
e. thermodynamic reactions do not occur
Answer  Explanation 

ANSWER: both energy and mass cross the boundaries of the system

Explanation:
No explanation is available for this question!


10)   Which law states that the specific heat of a gas remains constant at all temperatures and pressures______________________?

a. Charles’ Law
b. Joule’s Law
c. Regnault’s Law
d. Boyle’s Law
e. there is no such law
Answer  Explanation 

ANSWER: Regnault’s Law

Explanation:
No explanation is available for this question!


11)   Which law states that the internal energy of a gas is a function of temperature__________________?

a. Charles’ law
b. Joule’s law
c. Regnault’s law
d. Boyle’s law
e. there is no such law
Answer  Explanation 

ANSWER: Joule’s law

Explanation:
No explanation is available for this question!


12)   The ratio of two specific heats of air is equal to____________________?

a. 0.17
b. 0.24
c. 0.1
d. 1.41
e. 2.71
Answer  Explanation 

ANSWER: 1.41

Explanation:
No explanation is available for this question!


13)   Characteristic gas constant of a gas is equal to______________________?

a. C/Cv
b. Cv/Cp
c. Cp – Cv
d. Cp + Cv
e. Cp x Cv
Answer  Explanation 

ANSWER: Cp – Cv

Explanation:
No explanation is available for this question!


14)   Intensive property of a system is one whose value____________________?

a. depends on the mass of the system, like volume
b. does not depend on the mass of the system, like temperature, pressure, etc
c. is not dependent on the path followed but on the state
d. is dependent on the path followed and not on the state
e. remains constant
Answer  Explanation 

ANSWER: does not depend on the mass of the system, like temperature, pressure, etc

Explanation:
No explanation is available for this question!


15)   Superheated vapour behaves___________________?

a. exactly as gas
b. as steam
c. as ordinary vapour
d. approximately as a gas
e. as average of gas and vapour
Answer  Explanation 

ANSWER: approximately as a gas

Explanation:
No explanation is available for this question!


16)   The unit of power in S.I. units is_______________________?

a. newton
b. pascal
c. erg
d. watt
e. joule
Answer  Explanation 

ANSWER: watt

Explanation:
No explanation is available for this question!


17)   The pressure’of a gas in terms of its mean kinetic energy per unit volume E is equal to________________?

a. E/3
b. E/2
c. 3E/4
d. 2E/3
e. 5E/4
Answer  Explanation 

ANSWER: 2E/3

Explanation:
No explanation is available for this question!


18)   No liquid can exist as liquid at____________________?

a. – 273 °K
b. vacuum
c. zero pressure
d. centre of earth
e. in space
Answer  Explanation 

ANSWER: zero pressure

Explanation:
No explanation is available for this question!


19)   According to kinetic theory of gases, the absolute zero temperature is attained when___________________?

a. volume of the gas is zero
b. pressure of the gas is zero
c. kinetic energy of the molecules is zero
d. specific heat of gas is zero
e. mass is zero
Answer  Explanation 

ANSWER: kinetic energy of the molecules is zero

Explanation:
No explanation is available for this question!


20)   A closed system is one in which_________________________?

a. mass does not cross boundaries of the system, though energy may do so
b. mass crosses the boundary but not the energy
c. neither mass nor energy crosses the boundaries of the system
d. both energy and mass cross the boundaries of the system
e. thermodynamic reactions take place
Answer  Explanation 

ANSWER: mass does not cross boundaries of the system, though energy may do so

Explanation:
No explanation is available for this question!


21)   Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits ?

a. 02, N2, steam, C02
b. Oz, N2, water vapour
c. S02, NH3, C02, moisture
d. 02, N2, H2, air
e. steam vapours, H2, C02
Answer  Explanation 

ANSWER: 02, N2, H2, air

Explanation:
No explanation is available for this question!


22)   General gas equation is____________________?

a. PV=nRT
b. PV=mRT
c. PV = C
d. PV=KiRT
e. Cp-Cv = Wj
Answer  Explanation 

ANSWER: PV=mRT

Explanation:
No explanation is available for this question!


23)   According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as____________________?

a. temperature
b. absolute
c. absolute temperature, if volume is kept constant
d. volume, if temperature is kept constant
e. remains constant,if volume and temperature are kept constant
Answer  Explanation 

ANSWER: absolute temperature, if volume is kept constant

Explanation:
No explanation is available for this question!


24)   The unit of length in S.I. units is________________?

a. meter
b. centimeter
c. kilometer
d. millimeter
Answer  Explanation 

ANSWER: meter

Explanation:
No explanation is available for this question!


25)   The unit of temperature in S.I. units is _________________?

a. Centigrade
b. Celsius
c. Fahrenheit
d. Kelvin
e. Rankine
Answer  Explanation 

ANSWER: Kelvin

Explanation:
No explanation is available for this question!


26)   Which of the following laws is applicable for the behavior of a perfect gas__________________?

a. Boyle’s law
b. Charles’law
c. Gay-Lussac law
d. all of the above
e. Joule’s law
Answer  Explanation 

ANSWER: all of the above

Explanation:
No explanation is available for this question!


27)   The unit of time in S.I. units is__________________?

a. second
b. minute
c. hour
d. day
e. year
Answer  Explanation 

ANSWER: second

Explanation:
No explanation is available for this question!


28)   Which of the following variables controls the physical properties of a perfect gas_________________?

a. pressure
b. temperature
c. volume
d. all of the above
e. atomic mass
Answer  Explanation 

ANSWER: all of the above

Explanation:
No explanation is available for this question!


29)   Atmospheric pressure is equal to____________?

a. 1.013 bar
b. 760mm of Hg
c. 101.3KN/m2
d. All of these
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!