This set of Air-Conditioning Multiple Choice Questions & Answers (MCQs) focuses on “Psychrometric Relations”. 1. What is the value of humidity ratio if pv = 0.387 bar and pa = 0.997 bar? a) 0.482 b) 0.241 c) 0.122 d) 0.622 2. What is the value of humidity ratio if mv = 1.423 and ma = … Read more
This set of Air-Conditioning Multiple Choice Questions & Answers (MCQs) focuses on “Psychrometric Terms”. 1. What is the mixture of a number of gases? a) Moist air b) Dry air c) Fresh air d) Saturated air 2. Which of the following has the maximum contribution in the dry air? a) Nitrogen b) Argon c) Carbon … Read more
This set of Refrigeration online quiz focuses on “Evaporators Types, Factors Affecting it and Defrosting Methods”. 1. Why is the evaporator used? a) To improve C.O.P. b) To decrease the refrigeration effect c) To absorb heat d) To reject heat 2. What is the pressure side of a refrigerating system in which evaporator is used? … Read more
This set of Refrigeration Multiple Choice Questions & Answers (MCQs) focuses on “Condensers – Cooling Towers”. 1. Which of the following cooling towers possess maximum heat transfer from air to water? a) Natural Draft b) Mechanical Draft c) Natural and Mechanical Draft d) Atmospheric Draft 2. How is the performance of the cooling tower indicated? … Read more
This set of Refrigeration Questions & Answers for Exams focuses on “Condensers and Cooling Towers – 2”. 1. What is the pressure side of a refrigerating system in which condenser is used? a) Low pressure b) Zero pressure c) Negative pressure d) High pressure 2. What is the optimum temperature difference in Celsius for the … Read more
This set of Refrigeration Multiple Choice Questions & Answers (MCQs) focuses on “Condensers and Cooling Towers – 1”. 1. What is the purpose of using a condenser? a) To absorb heat b) To reject heat c) To convert liquid refrigerant to vapor refrigerant d) To convert solid refrigerant to vapor refrigerant 2. Which of the … Read more
This set of Refrigeration Multiple Choice Questions & Answers (MCQs) focuses on “Refrigerant Compressors – Multi – Stage Compression”. 1. Why is multi-stage compression used? a) To improve C.O.P. b) To decrease the refrigeration effect c) To increase work d) To increase leakage loss 2. What is the expression for optimum intercooler or intermediate pressure … Read more
This set of Refrigeration Multiple Choice Questions & Answers (MCQs) focuses on “Types of Refrigerant Compressors”. 1. Where is the reciprocating compressor mostly suitable? a) Small displacements and low condensing pressures b) Small displacements and high condensing pressures c) Large displacements and low condensing pressures d) Large displacements and high condensing pressures 2. Where is … Read more
This set of Refrigeration Objective Questions & Answers focuses on “Refrigerant Compressors – 2”. 1. What is the work done during an isothermal compression? a) 2.3 mRT1 ln (p2 / p1) b) 2.3 mRP1 ln (p2 / p1) c) 2.3 mRT1 ln (p1 / p2) d) mRT1 ln (p2 / p1) 2. What is the … Read more
This set of Refrigeration Multiple Choice Questions & Answers (MCQs) focuses on “Refrigerant Compressors – 1”. 1. What is the purpose of using a refrigerant compressor? a) Raise the temperature of refrigerant b) Reduce the temperature of refrigerant c) Reduce the pressure of refrigerant d) Expand the refrigerant 2. What must be the state of … Read more
