GATE 2022 ME: RAC, PPE & IC Engines Quiz - 5
Attempt now to get your rank among 283 students!
(a) Heat rejection ratio increases as evaporator temperature increases and condenser temperature decreases.
(b) Heat rejection ratio increases as evaporator temperature decreases and condenser temperature increases.
(c) For the same evaporator and condenser temperature, heat rejection ratio of open type compressor is small compared to hermetic compressors.
(d) The required size of condenser increases as heat rejection ratio decreases.
(a) Compared to water cooled condensers, the maintenance cost is low in air cooled condensers.
(b) Normally, systems with water cooled condensers operate at lower condensing temperature as compared to systems with air cooled condensers.
(c) The initial cost of water cooled condenser is high compared to air cooled condenser.
(d) all of above
(a) It performs the thermodynamic function of expanding the liquid refrigerant from condenser pressure to evaporator pressure.
(b) Controls the supply of refrigerant to evaporator.
(c) It is a restriction offering resistance.
(d) All of above
(a) To improve the volumetric efficiency of the compressor.
(b) To accommodate valves
(c) To account for thermal expansion due to temperature variation
(d) To reduce power consumption of compressor
Thermal efficiency (in %) and steam rate (kg/kWh) of the plant neglecting pump work respectively are:
- 283 attempts
- 2 upvotes
- 1 comment