Q.1
What is the value of enthalpy when refrigerant enters the compressor, i.e., point 1?
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)
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)
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)
Q.4
What is the value of enthalpy when refrigerant enters the compressor, i.e., point 1?
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)
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)
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)
  • c) m1 (h11 – h10) + m2 (h9 – h7) + m3 (h6 – h1) / (me1 + me2 + me3) (h2 – h8)
  • b) m₁ (h11 – h10) + m₂ (h8 – h7) + m₃ (h5 – h4) / (m₁ + m₂ + m₃) (h2 – h7)
  • d) m₁ (h11 – h10) + m₂ (h₈ – h₇) + m₃ (h₅ – h₄) / (m₁ + m₂ + m₃) (h₂ – h₁)
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)
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
Q.9
What is the value of C.O.P. in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers9.jpg
  • 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)
  • a) m₁ (h11 – h10) + m₂ (h8 – h7) + m₃ (h5 – h4) / (m₁ + m₂ + m₃) (h2 – h3)
  • d) m₁ (h11 – h10) + m₂ (h₈ – h₇) + m₃ (h₅ – h₄) / (m₁ + m₂ + m₃) (h₂ – h₁)
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)
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)
Q.12
What is the value of C.O.P. in the following arrangement?
Questionrefrigeration-air-conditioning-questions-answers12.jpg
  • 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)
  • a) m₁ (h₁ – h12) + m₂ (h₃ – h10) + m₃ (h₅ – h₈)
Q.13
What is the value of enthalpy when refrigerant enters the second compressor, i.e., point 4?
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)
Q.14
What is the value of enthalpy when refrigerant enters the third compressor, i.e., point 7?
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)
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)
0 h : 0 m : 1 s