Refrigeration And Air Conditioning MCQ Questions & Answers | Mechanical Engineering

A. Operating the machine at higher speeds

B. Operating the machine at lower speeds

C. Raising the higher temperature

D. Lowering the higher temperature

A. High pressure liquid refrigerant

B. Low pressure liquid and vapour refrigerant

C. Low pressure vapour refrigerant

D. None of these

A. Heat of compression

B. Work done by compressor

C. Enthalpy increase in compressor

D. All of the above

A. Less than 2 kg

B. More than or equal to 3.65 kg

C. More than 10 kg

D. There is no such consideration

A. $$\frac{{0.622{{\text{P}}_{\text{v}}}}}{{{{\text{P}}_{\text{b}}} - {{\text{P}}_{\text{v}}}}}$$

B. $$\frac{\mu }{{1 - \left( {1 - \mu } \right)\frac{{{{\text{P}}_{\text{s}}}}}{{{{\text{P}}_{\text{b}}}}}}}$$

C. $$\frac{{{{\text{P}}_{\text{v}}}\left( {{{\text{P}}_{\text{b}}} - {{\text{P}}_{\text{d}}}} \right)}}{{{{\text{P}}_{\text{d}}}\left( {{{\text{P}}_{\text{b}}} - {{\text{P}}_{\text{v}}}} \right)}}$$

D. None of these

A. Suction of compressor

B. Delivery of compressor

C. High pressure side close to receiver

D. Low pressure side near receiver

A. 0.2

B. 1.2

C. 5

D. 6

A. Pressure lines

B. Temperature lines

C. Total heat lines

D. Entropy lines

A. Water

B. Ammonia

C. Freon

D. Aqua-ammonia

A. It is toxic to mucous membranes.

B. It requires large displacement per TR compared to fluoro carbons.

C. It reacts with copper and its alloys.

D. All of these