Explore topic-wise MCQs in Refrigeration.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.

1.

The main disadvantage of centrifugal compressors is surging.

A. False
B. True
Answer» C.
Discussion
2.

What is the value of volumetric efficiency?VC = 0.445, VS = 0.843 and VP = 1.087

A. 1.289
B. 0.5278
C. 1.894
D. 0.775
Answer» E.
Discussion
3.

What is the value of the clearance factor?If, VC = 0.137 and VP = 0.034

A. 0.00465
B. 0.0465
C. 4.029
D. 0.2481
Answer» D. 0.2481
Discussion
4.

What is the value of swept volume?If, D = 10 mm

A. nL = 6 mm
B. 188.49
C. 94.2477
D. 47.1238
E. 471.23
Answer» E. 471.23
Discussion
5.

What is the work done during an isentropic compression?

A. [n / (n 1)] mR (T<sub>2</sub> T<sub>1</sub>)
B. [n / (n + 1)] mR (T<sub>2</sub> T<sub>1</sub>)
C. [n / (n 1)] mR (T<sub>2</sub> + T<sub>1</sub>)
D. [n / (n + 1)] mR (T<sub>2</sub> + T<sub>1</sub>)
Answer» B. [n / (n + 1)] mR (T<sub>2</sub> T<sub>1</sub>)
Discussion
6.

What is the work done during a polytropic compression?

A. [n / (n 1)] mR (T<sub>2</sub> T<sub>1</sub>)
B. [n / (n + 1)] mR (T<sub>2</sub> T<sub>1</sub>)
C. [n / (n 1)] mR (T<sub>2</sub> + T<sub>1</sub>)
D. [n / (n + 1)] mR (T<sub>2</sub> + T<sub>1</sub>)
Answer» B. [n / (n + 1)] mR (T<sub>2</sub> T<sub>1</sub>)
Discussion
7.

What is the work done during an isothermal compression?

A. 2.3 mRT<sub>1</sub> ln (p<sub>2</sub> / p<sub>1</sub>)
B. 2.3 mRP<sub>1</sub> ln (p<sub>2</sub> / p<sub>1</sub>)
C. 2.3 mRT<sub>1</sub> ln (p<sub>1</sub> / p<sub>2</sub>)
D. mRT<sub>1</sub> ln (p<sub>2</sub> / p<sub>1</sub>)
Answer» E.
Discussion