320 Important Engineering Thermodynamics MCQ Question and Answer | PDF Free Download
1.When cut-off ratio is ________; the efficiency of Diesel cycle approaches to Otto cycle efficiency
- A¼
- BZero
- C1/5
- D2
3.Carbonization of coal consists of
- ADrying and crushing the coal to a fine powder
- BMoulding the finely ground coal under pressure with or without a binding material
- CHeating the wood with a limited supply of air to temperature not less than 280°C
- DNone of the above
4.Which of the following gas has the highest calorific value?
- ACoal gas
- BProducer gas
- CMond gas
- DBlast furnace gas
5.Which of the following has the highest calorific value?
- AAnthracite coal
- BBituminous coal
- CPeat
- DLignite
6.According to kinetic theory of gases, the absolute zero temperature is attained when
- AVolume of the gas is zero
- BPressure of the gas is zero
- CKinetic energy of the molecules is zero
- DSpecific heat of gas is zero
7.The entropy of water at 0°C is assumed to be
- A0
- B-1
- C1
- D2
8.Otto cycle is also known as
- AConstant pressure cycle
- BConstant volume cycle
- CConstant temperature cycle
- DConstant temperature and pressure cycle
9.Total heat of a substance is also known as
- AInternal energy
- BEntropy
- CV
- DEnthalpy
10.Change in enthalpy of a system is the heat supplied at
- AConstant pressure
- BConstant temperature
- CConstant volume
- DConstant entropy
11.The specific heat of water is
- A2.512
- B1.817
- C4.187
- DNone of these
12.The amount of heat generated per kg of fuel is known as
- ACalorific value
- BHeat energy
- CLower calorific value
- DHigher calorific value
13.The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as
- AElement
- BCompound
- CAtom
- DMolecule
14.A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as
- AIrreversible cycle
- BThermodynamic cycle
- CReversible cycle
- DNone of these
15.According to which law, all perfect gases change in volume by 1/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant
- AJoule's law
- BBoyle's law
- CBoyle's law
- DCharles' law
16.The absolute zero pressure will be
- AWhen molecular momentum of the system becomes zero
- BAt sea level
- CAt the temperature of - 273 K
- DAt the center of the earth
17.In an isothermal process, the internal energy of gas molecules
- AIncreases
- BDecreases
- CRemain constant
- DMay increase/decrease depending on the properties of gas
18.The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called
- ASpecific heat at constant volume
- BSpecific heat at constant pressure
- Ckilo-Joule
- DNone of these
19.Energy can neither be created nor destroyed but can be converted from one form to other is inferred from
- AZeroth law of thermodynamic
- BFirst law of thermodynamics
- CSecond law to thermodynamics
- DBasic law of thermodynamics
20.When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
- AZeroth law of thermodynamics
- BFirst law of thermodynamics
- CSecond law of thermodynamics
- DKelvin Planck's law