KERALA PSC ASSISTANT MOTOR VEHICLE INSPECTOR (AMVI) MODEL QUESTIONS 2015
ASSISTANT MOTOR VEHICLE INSPECTOR (AMVI) EXPECTED QUESTIONS
TOPIC: THERMAL ENGINEERING
1. A reversible engine working between temperature limits of 500 K and 1000 K received 50 kJ heat. The work done by the engine will be
(A) 50 kJ
(B) 25 kJ
(C) -25 kJ
(D) 100 kJ
2. The function of condenser in a steam power plant is
(A) to reduce back pressure
(B) to utilize heat of exhaust steam
(C) to preheat feed water with exhaust steam
(D) to act as a heat sink
3. 1 Torr is equal to
(A) 1 mm Hg
(B) 13.6 cm of water column
(C) 760 mm of Hg
(D) 760 mm of Water
4. The negative loop in the PV diagrams of a petrol engine is due to
(A) Pre-ignition
(B) Detonation
(C) Suction of air
(D) Early opening of exhaust valve
5. In case of white body, absorptivity is
(A) Zero
(B) Between 0 and 0.5
(C) More than 0.5
(D) 1
6. Solar cells are made of
(A) Silica
(B) Steel
(C) Antimony
(D) Phosphorus
7. A newly charged ammonia compression system, the clicking sound in the expansion valve indicates
(A) High pressure after compression
(B) Excessive ammonia charged
(C) Evaporator coils chocked
(D) Lack of ammonia
8. In a vapour absorption system the function of rectifier is
(A) To seprate ammonia and water
(B) To cool the vapour leaving the analyser
(C) To dissolve ammonia in water
(D) To add energy from external source
9. During air conditioning, whenever two or more streams of moist are mixed, they follow
(A) Adiabatic process
(B) Isotherma process
(C) Polytropic process
(D) Isobaric process
10. In a cooling tower, heat is disssipated mainly by
(A) Radiation
(B) Conduction
(C) Convection
(D) Evaporation
11. One metre (1 m) of water column is equivalent to
(A) 0.1 kN per square meter
(B) 1.0 kN per square meter
(C) 10 kN per square meter
(D) 100 kN per square meter
12. A rotameter should always be installed in
(A) Horizontal position
(B) Vertifical position
(C) Inclined at 30 degree to the vertical
(D) Inclined at 45 degree to the vertical
13. Work done in free expansion process is
(A) Zero
(B) Minimum
(C) Maximum
(D) Positive
14. 1 kgf/cm2 is equal to
(A) 1 mm Hg
(B) 100 mm Hg
(C) 735.6 mm Hg
(D) 760 mm Hg
15. For a reversible adiabatic process, the change in entropy of the system and surrounding is
(A) Unity
(B) Zero
(C) Infinite
(D) Positive
16.During throttling process
(A) Internal energy does not change
(B) Pressure does not change
(C) Entropy does not change
(D) Enthalpy does not change
17. The cycle generally used for gas turbine is
(A) Rankine cycle
(B) Brayton cycle
(C) Dual cycle
(D) Carnot cycle
18. At critical point, the enthalpy of vaporization is
(A) Only dependent on temperature
(B) Zero
(C) Minimum
(D) Maximum
19.The process during which external work done is not zero,
(A) Constant volume process
(B) Constant pressure process
(C) Throttling
(D) Free expansion
20. The efficiency of a diesel cycle will be maximum when
(A) Speed is high
(B) Injection pressure is high
(C) Cyclinder is water cooled
(D) Cut off is zero
