Refrigeration and Air Conditioning

Question: A condenser is used in the __________ pressure side of a refrigerating system. [A]. low [B]. high Answer: Option B Explanation: No answer description available for this question.

Question: A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be [A]. lack of cooling water [B]. water temperature being high [C]. dirty condenser surface [D]. all of these Answer: Option D Explanation: No answer description available for this question.

Question: For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is [A]. reciprocating [B]. rotating [C]. centrifugal [D]. screw Answer: Option C Explanation: No answer description available for this question.

Question: A refrigerant compressor is used to [A]. raise the pressure of the refrigerant [B]. raise the temperature of the refrigerant [C]. circulate the refrigerant through the refrigerating system [D]. all of the above Answer: Option D Explanation: No answer description available for this question.

Question: Moisture should be removed from refrigerants to avoid [A]. freezing at the expansion valve [B]. restriction to refrigerant flow [C]. corrosion of steel plates [D]. all of these Answer: Option D Explanation: No answer description available for this question.

Question: Which of the following refrigerant has the maximum ozone depletion potential in the stratophere? [A]. Ammonia [B]. Carbon dioxide [C]. Sulphur dioxide [D]. Flourine Answer: Option D Explanation: No answer description available for this question.

Question: Environmental protection agencies advice against the use of chloro-fluoro-carbon refrigerants since [A]. these react with water vapour and cause acid rain [B]. these react with plants and cause green-house effect [C]. these react with oxygen and cause its depletion [D]. these react with ozone layer Answer: Option D Explanation: No answer description available for…

Question: In larger industrial and commercial reciprocating compression systems, refrigerent widely used is [A]. ammonia [B]. carbon dioxide [C]. sulphur dioxide [D]. R-12 Answer: Option A Explanation: No answer description available for this question.

Question: In absorption vapour systems, the refrigerant widely used is R-12. [A]. Correct [B]. Incorrect Answer: Option B Explanation: No answer description available for this question.

Question: Carbon dioxide is [A]. colourless [B]. odourless [C]. non-flammable [D]. all of these Answer: Option D Explanation: No answer description available for this question.