Refrigeration And Air Conditioning MCQ Questions & Answers | Mechanical Engineering

A. Remains constant

B. Increases

C. Decreases

D. None of these

A. $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2} - {{\text{T}}_1}}}$$

B. $$\frac{{{{\text{T}}_2} - {{\text{T}}_1}}}{{{{\text{T}}_1}}}$$

C. $$\frac{{{{\text{T}}_1} - {{\text{T}}_2}}}{{{{\text{T}}_1}}}$$

D. $$\frac{{{{\text{T}}_2}}}{{{{\text{T}}_2} - {{\text{T}}_1}}}$$

A. $$\frac{{{\text{Theoretical C}}{\text{.O}}{\text{.P}}{\text{.}}}}{{{\text{Actual C}}{\text{.O}}{\text{.P}}{\text{.}}}}$$

B. $$\frac{{{\text{Actual C}}{\text{.O}}{\text{.P}}{\text{.}}}}{{{\text{Theoretical C}}{\text{.O}}{\text{.P}}{\text{.}}}}$$

C. Actual C.O.P. × Theoretical C.O.P.

D. None of these

A. Increased to a value above its critical temperature

B. Reduced to a value below its critical temperature

C. Equal to critical temperature

D. None of the above

A. It permits higher speeds to be used

B. It permits complete evaporation in the evaporator

C. It results in high volumetric and mechanical efficiency

D. All of the above

A. Halide torch which on detection produces greenish flame lighting

B. Sulphur sticks which on detection gives white smoke

C. Using reagents

D. Smelling

A. Receiver

B. Expansion valve

C. Evaporator

D. Compressor discharge

A. Near critical temperature of refrigerant

B. Above critical temperature

C. At critical Temperature

D. Much below critical temperature

A. 1

B. 1.12

C. 2.15

D. 5.12

A. Cost is too high

B. Capacity control is not possible

C. It is made of copper

D. Required pressure drop cannot be achieved