Q.1

The mass of excess air supplied is equal to

  • x Mass of excess carbon
  • x Mass of excess oxygen
  • x Mass of excess carbon
  • x Mass of excess oxygen
Q.2

The throttling process is __________ process.

  • reversible
  • irreversible
  • reversible or irreversible
Q.3

The atomic mass of an element is the number of times the atom of that element is heavier than the hydrogen atom.

  • True
  • False
Q.4

The natural petroleum may be separated into

  • petrol
  • kerosene
  • fuel oil
  • lubricating oil
Q.5

The general law for the expansion or compression of gases, is

  • pv = C
  • pv = m R T
  • pvn = C
  • pvγ = C
Q.6

The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.

  • Boyle's law
  • Charle's law
  • Gay-Lussac law
  • Joule's law
Q.7

Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as

  • Zeroth law of thermodynamics
  • First law of thermodynamics
  • Second law of thermodynamics
  • Kinetic theory of gases
Q.8

The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called

  • specific heat at constant volume
  • specific heat at constant pressure
  • kilo-Joule
  • none of these
Q.9

The mass of excess air supplied is equal to

  • x Mass of excess carbon
  • x Mass of excess oxygen
  • x Mass of excess carbon
  • x Mass of excess oxygen
Q.10

A definite area or a space where some thermodynamic process takes place is known as

  • thermodynamic system
  • thermodynamic cycle
  • thermodynamic process
  • thermodynamic law
Q.11

A cycle consisting of two constant pressure and two isothermal processes is known as Ericsson cycle.

  • True
  • False
Q.12

A closed cycle gas turbine works on Joule's cycle.

  • True
  • False
Q.13

When wood is heated with a limited supply of air to a temperature not less than 280°C, the resulting fuel is

  • coke
  • wood charcoal
  • bituminous coal
  • briquetted coal
Q.14

A cycle consisting of two isothermal and two isentropic processes, is known as

  • Carnot cycle
  • Stirling cycle
  • Ericsson cycle
  • Joule cycle
Q.15

The amount of heat required to raise the temperature of __________ water through one degree is called kilojoule.

  • 1 g
  • 10 g
  • 100 g
  • 1000 g
Q.16

A cycle consisting of two isothermal and two isentropic processes, is known as

  • Carnot cycle
  • Stirling cycle
  • Ericsson cycle
  • Joule cycle
Q.17

A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as

  • cracking
  • carbonisation
  • fractional distillation
  • full distillation
Q.18

If in the equation pvn = C, the value of n =then the process is called isothermal process.

  • True
  • False
Q.19

A cycle consisting of two isothermal and two isentropic processes, is known as

  • Carnot cycle
  • Stirling cycle
  • Ericsson cycle
  • Joule cycle
Q.20

The specific volume of a system is an __________ property.

  • extensive
  • intensive
Q.21

Which of the following process can be made reversible with the help of a regenerator?

  • Constant pressure process
  • Constant volume process
  • Constant pvn process
  • all of these
Q.22

The sum of internal energy (U) and the product of pressure and volume (p.v) is known as

  • workdone
  • entropy
  • enthalpy
  • none of these
Q.23

The value of specific heat at constant pressure (cp) is __________ that of at constant volume (cv).

  • less than
  • equal to
  • more than
Q.24

Carbonisation of coal consists of

  • drying and crushing the coal to a fine powder
  • moulding the finely ground coal under pressure with or without a binding material
  • heating the wood with a limited supply of air to temperature not less than 280°C
  • none of the above
Q.25

According to Avogadro's law, the density of any two gases is __________ their molecular masses, if the gases are at the same temperature and pressure.

  • equal to
  • directly proportional to
  • inversely proportional to
Q.26

The constant pressure, constant volume and constant pvn processes are regarded as irreversible process.

  • True
  • False
Q.27

The value of 1 mm of Hg is equal to

  • 1.333 N/m2
  • 13.33 N/m2
  • 133.3 N/m2
  • 1333 N/m2
Q.28

When coal is strongly heated continuously fortohours in the absence of air in a closed vessel, the process is known as __________ of fuel.

  • atomisation
  • carbonisation
Q.29

The efficiency of Diesel cycle approaches to Otto cycle efficiency when

  • cut-off is increased
  • cut-off is decreased
  • cut-off is zero
  • cut-off is constant
Q.30

The efficiency of Diesel cycle approaches to Otto cycle efficiency when

  • cut-off is increased
  • cut-off is decreased
  • cut-off is zero
  • cut-off is constant
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