Q.1
##### What is the value of enthalpy when refrigerant enters the compressor, i.e., point 1?
• 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?
• 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?
• 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?
• 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?
• 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?
• 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)
Q.7
##### What is the value of the refrigeration effect in the following arrangement?
• 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?
• 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?
• 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)
Q.10
##### What is the value of the refrigeration effect in the following arrangement?
• 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?
• 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?
• 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)
Q.13
##### What is the value of enthalpy when refrigerant enters the second compressor, i.e., point 4?
• 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?
• 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?
• 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)