320 Important Engineering Thermodynamics MCQ Question and Answer | PDF Free Download
1.The entropy may be expressed as a function of
- APressure and temperature
- BTemperature and volume
- CHeat and work
- DAll of these
2.A molecule consisting of one atom is known as
- AMono-atomic
- BDi-atomic
- CTri-atomic
- DPoly-atomic
3.One molecule of oxygen consists of __________ atoms of oxygen.
- A2
- B4
- C8
- D16
4.For the same maximum pressure and temperature
- AOtto cycle is more efficient than Diesel cycle
- BDiesel cycle is more efficient than Otto cycle
- CDual cycle is more efficient than Otto and Diesel cycles
- DDual cycle is less efficient than Otto and Diesel cycles
5.Mixture of ice and water form a
- AClosed system
- BOpen system
- CIsolated system
- DHeterogeneous system
6.The unit of length in S.I. units is
- AMeter
- BCentimeter
- CKilometer
- DMillimeter
7.The unit of pressure in S.I. units is
- Akg/cm²
- Bmm of water column
- CPascal
- DDyne per square cm
8.The unit of mass in S.I. units is
- AKilogram
- BGram
- CTonne
- DQuintal
9.During which of the following process does heat rejection takes place in Carnot cycle?
- AIsothermal expansion
- BIsentropic expansion
- CIsothermal compression
- DIsentropic compression
10.The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to
- A0
- B1
- CY
- D∝
11.Molecular volume of any perfect gas at 600 × 103 N/m² and 27°C will be
- A4.17 m3/kg mol
- B400 m3/kg mol
- C0.15 m3/kg mol
- D41.7 m3/kg mol
12.The absolute zero pressure can be attained at a temperature of
- A0°C
- B-273°C
- C273 K
- DNone of these
13.An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is
- AFeasible
- BImpossible
- CPossible
- DPossible, but with lot of sophistications
14.Which of the following items is not a path function?
- AHeat
- BWork
- CKinetic energy
- DThermal conductivity
15.Addition of heat at constant pressure to a gas results in
- ARaising its temperature
- BRaising its pressure
- CRaising its volume
- DRaising its temperature and doing external work
16.The unit of energy in S.I. units is
- AWatt
- BJoule
- Cjoule/s
- Djoule/m
17.The unit of time in S.I. units is
- ASecond
- BMinute
- CHour
- DDay
18.The unit of temperature in S.I. units is
- ACentigrade
- BCelsius
- CFahrenheit
- DKelvin
19.The unit of power in S.I. units is
- ANewton
- BPascal
- CErg
- DWatt
20.The value of the product of molecular weight and the gas characteristic constant for all the gases in S.I. units is
- A29.27 J/kmol °K
- B83.14 J/kmol °K
- C848 J/kmol °K
- D735 J/kmol °K