Q.1

Which of the following is an intensive property of a thermodynamic system?

  • Volume
  • Temperature
  • Mass
  • Energy
Q.2

The blast furnace gas is a by-product in the production of pig iron in the blast furnace.

  • Yes
  • No
Q.3

The free expansion process is a constant enthalpy process.

  • Correct
  • Incorrect
Q.4

The specific heat at constant volume is

  • the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant pressure
  • the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant volume
  • the amount of heat required to raise the temperature of 1 kg of water through one degree
  • any one of the above
Q.5

The gas constant (R) is equal to the __________ of two specific heats.

  • sum
  • difference
  • product
  • ratio
Q.6

In an isolated system, neither the heat and work nor the, mass of the working substance crosses the boundary of the system.

  • True
  • False
Q.7

The volumetric or molar specific heat at constant pressure is the product of

  • molecular mass of the gas and the specific heat at constant volume
  • atomic mass of the gas and the gas constant
  • molecular mass of the gas and the gas constant
  • none of the above
Q.8

One Joule (J) is equal to

  • 1 N-m
  • 1 kN-m
  • 10 N-m/s
  • 10 kN-m/s
Q.9

The conditions of temperature and pressure at 0°C (273K) andmm of Hg pressure are termed as __________ temperature and pressure.

  • normal
  • standard
Q.10

Producer gas is obtained by

  • partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
  • carbonisation of bituminous coal
  • passing steam over incandescent coke
  • passing air and a large amount of steam over waste coal at about 650°C
Q.11

The heating of a gas at constant pressure is governed by Charles' law.

  • True
  • False
Q.12

The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to

  • 0
  • 1
  • γ
Q.13

The state of a substance whose evaporation from its liquid state is partial, is known as steam.

  • Agree
  • Disagree
Q.14

The heating and expanding of a gas is called thermodynamic system.

  • Yes
  • No
Q.15

A triatomic molecule consists of __________ atoms.

  • one
  • two
  • three
  • four
Q.16

The heat supplied to the gaS at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 - T1 = Rise in temperature, and R = Gas constant)

  • mR(T2 - T1)
  • mcv(T2 - T1)
  • mcp(T2 - T1)
  • mcp(T2 + T1)
Q.17

The compression ratio is the ratio of

  • swept volume to total volume
  • total volume to swept volume
  • swept volume to clearance volume
  • total volume to clearance volume
Q.18

The efficiency of Carnot cycle depends upon

  • temperature limits
  • pressure ratio
  • volume compression ratio
  • cut-off ratio and compression ratio
Q.19

For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.

  • greater than
  • less than
  • equal to
Q.20

When the expansion or compression takes place according to the law pvn = C, the process is known as

  • isothermal process
  • adiabatic process
  • hyperbolic process
  • polytropic process
Q.21

According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.

  • remains constant
  • increases
  • decreases
Q.22

The unit of power in S.I. units is kilowatt.

  • True
  • False
Q.23

The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)

  • pv = mRT
  • pv = RTm
  • pvm = C
  • pv = (RT)m
Q.24

The standard value of atmospheric pressure taken at sea level is

  • 1.013 bar
  • 760 mm of Hg
  • 1013 x 102 N/m2
  • all of these
Q.25

The value of cp/cv for air is

  • 1
  • 1.4
  • 1.8
  • 23
Q.26

The efficiency of a dual combustion cycle __________ upon cut-off ratio.

  • depends
  • does not depend
Q.27

Which of the following statement is wrong?

  • The closed cycle gas turbine plants are external combustion plants.
  • In the closed cycle gas turbine, the pressure range depends upon the atmospheric pressure.
  • The advantage of efficient internal combustion is eliminated as the closed cycle has an external surface.
  • In open cycle gas turbine, atmosphere acts as a sink and no coolant is required.
Q.28

The value of universal gas constant is same for all gases.

  • Yes
  • No
Q.29

The main cause for the irreversibility is

  • mechanical and fluid friction
  • unrestricted expansion
  • heat transfer with a finite temperature difference
  • all of the above
Q.30

Boyle's law states that change of internal energy of a perfect gas is directly proportional to the change of temperature.

  • Agree
  • Disagree
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