Practice Refrigeration Written Test Multiple Choice Questions with Answers Quiz-1

Q.1.

What is the value of enthalpy when refrigerant enters the compressor, i.e., point 1?
Questionrefrigeration-air-conditioning-questions-answers1.jpg

Questionrefrigeration-air-conditioning-questions-answers1.jpg

a) m1 h11 + m2 h8 + m3 h5 / (m1 + m2 – m3)
b) m1 h11 + m2 h8 + m3 h5 / (m1 – m2 + m3)
c) m1 h11 + m2 h8 + m3 h5 / (m1 + m2 + m3)
d) m1 h5 + m2 h5 + m3 h4 / (m1 + m2 + m3)

Explanation

Q.2.

What is the value of the refrigeration effect in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers2.jpg

a) m1 (h11 – h10) + m2 (h8 – h1) + m3 (h5 – h2)
b) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h5 – h4)
c) m1 (h11 – h10) + m2 (h8 – h2) + m3 (h2 – h4)
d) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h1 – h4)

Explanation

Q.3.

What is the value of C.O.P. in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers3.jpg

a) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h5 – h4) / (m1 + m2 + m3) (h2 – h3)
b) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h5 – h4) / (m1 + m2 + m3) (h2 – h7)
c) m1 (h11 – h10) + m3 (h8 – h7) + m2 (h5 – h4) / (m1 + m2 + m3) (h2 – h1)
d) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h5 – h4) / (m1 + m2 + m3) (h2 – h1)

Explanation

Q.4.

What is the value of enthalpy when refrigerant enters the compressor, i.e., point 1?
Questionrefrigeration-air-conditioning-questions-answers4.jpg

Questionrefrigeration-air-conditioning-questions-answers4.jpg

a) me1 h11 + me2 h9 + me3 h6 / (me1 + me2 + me3)
b) me1 h11 + me2 h9 + me3 h5 / (me1 + me2 + me3)
c) me1 h11 + me2 h8 + me3 h6 / (me1 + me2 + me3)
d) m1 h5 + m2 h5 + m3 h4 / (m1 + m2 + m3)

Explanation

Q.5.

What is the value of the refrigeration effect in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers5.jpg

a) m1 (h11 – h10) + m2 (h8 – h1) + m3 (h5 – h2)
b) m1 (h11 – h10) + m2 (h9 – h7) + m3 (h6 – h4)
c) m1 (h11 – h10) + m2 (h8 – h2) + m3 (h2 – h4)
d) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h1 – h4)

Explanation

Q.6.

What is the value of C.O.P. in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers6.jpg

a) m1 (h11 – h10) + m2 (h9 – h7) + m3 (h6 – h4) / (me1 + me2 + me3) (h2 – h1)
b) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h5 – h4) / (m1 + m2 + m3) (h2 – h7)
c) m1 (h11 – h10) + m2 (h9 – h7) + m3 (h6 – h1) / (me1 + me2 + me3) (h2 – h8)
d) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h5 – h4) / (m1 + m2 + m3) (h2 – h1)

Explanation

Q.7.

What is the value of the refrigeration effect in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers7.jpg

a) m1 (h1 – h10) + m2 (h8 – h1) + m3 (h5 – h2)
b) m1 (h1 – h10) + m2 (h8 – h7) + m3 (h5 – h4)
c) m1 (h1 – h10) + m2 (h3 – h9) + m3 (h5 – h8)
d) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h1 – h4)

Explanation

Q.8.

What is the value of total power required to run the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers8.jpg

a) m1 (h2 – h1) + m3 (h4 – h3) + m2 (h6 – h1)
b) m1 (h2 – h1) + m2 (h4 – h3) + m3 (h6 – h5)
c) m2 (h2 – h1) + m3 (h4 – h3) + m1 (h6 – h5) / 60
d) m1 (h2 – h1) + m2 (h4 – h3) + m3 (h6 – h5) / 60

Explanation

Q.9.

What is the value of C.O.P. in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers9.jpg

a) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h5 – h4) / (m1 + m2 + m3) (h2 – h3)
b) m1 (h1 – h10) + m2 (h3 – h9) + m3 (h5 – h8) / m1 (h2 – h1) + m2 (h4 – h3) + m3 (h6 – h5)
c) m1 (h1 – h10) + m2 (h3 – h9) + m3 (h5 – h8) / m1 (h2 – h1) + m2 (h4 – h2) + m3 (h6 – h3)
d) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h5 – h4) / (m1 + m2 + m3) (h2 – h1)

Explanation

Q.10.

What is the value of the refrigeration effect in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers10.jpg

a) m1 (h1 – h12) + m2 (h3 – h10) + m3 (h5 – h8)
b) m1 (h11 – h10) + m2 (h9 – h7) + m3 (h6 – h4)
c) m1 (h1 – h12) + m2 (h9 – h10) + m3 (h5 – h4)
d) m1 (h11 – h10) + m2 (h8 – h7) + m3 (h1 – h4)

Explanation

Q.11.

What is the value of total work done in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers11.jpg

a) me1 (h2 – h1) + me2 (h4 – h3) + me3 (h4 – h5)
b) me1 (h2 – h1) + me3 (h4 – h3) + me2 (h6 – h5)
c) me1 (h2 – h1) + me3 (h4 – h3) + me3 (h6 – h5)
d) m1 h5 + m2 h5 + m3 h4 / (m1 + m2 + m3)

Explanation

Q.12.

What is the value of C.O.P. in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers12.jpg

a) m1 (h1 – h12) + m2 (h3 – h10) + m3 (h5 – h8)
b) m1 (h1 – h12) + m2 (h3 – h10) + m3 (h5 – h8) / me1 (h2 – h1) + me2 (h4 – h3) + me3 (h6 – h5)
c) m1 (h1 – h12) + m2 (h3 – h10) + m3 (h5 – h8) / me1 (h2 – h5) + me2 (h4 – h2) + me3 (h6 – h5)
d) m1 (h1 – h12) + m2 (h3 – h10) + m3 (h5 – h8) / me1 (h2 – h1) + me2 (h4 – h1) + me3 (h6 – h1)

Explanation

Q.13.

What is the value of enthalpy when refrigerant enters the second compressor, i.e., point 4?
Questionrefrigeration-air-conditioning-questions-answers13.jpg

Questionrefrigeration-air-conditioning-questions-answers13.jpg

a) m1 h2 + m2 h3 / (m1 + m2)
b) m1 h11 + m2 h8 + m3 h5 / (m1 – m2 + m3)
c) m1 h2 + m2 h1 / (m1 + m2)
d) m1 h5 + m2 h5 + m3 h4 / (m1 + m2 + m3)

Explanation

Q.14.

What is the value of enthalpy when refrigerant enters the third compressor, i.e., point 7?
Questionrefrigeration-air-conditioning-questions-answers14.jpg

Questionrefrigeration-air-conditioning-questions-answers14.jpg

a) m1 h2 + m2 h3 / (m1 + m2)
b) m1 h11 + m2 h8 + m3 h5 / (m1 – m2 + m3)
c) (m1 + m2) h5 + m3 h6 / (m1 + m2 + m3)
d) m1 h5 + m2 h5 + m3 h4 / (m1 + m2 + m3)

Explanation

Q.15.

What is the power required for the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers15.jpg

a) m1 (h2 – h11) + (m1 + m2) (h5 – h8) + (m1 + m2 + m3) (h8 – h7) / 60
b) m1 (h2 – h1) + (m1 + m2) (h5 – h4) + (m1 + m2 + m3) (h8 – h7) / 60
c) m1 (h2 – h1) + (m2 + m3) (h5 – h4) + (m1 + m2 + m3) (h8 – h7) / 60
d) m1 h5 + m2 h5 + m3 h4 / (m1 + m2 + m3)

Explanation

Support mcqgeeks.com by disabling your adblocker.