# A 1 hp motor is used for running a dual cylinder reciprocating compressor of a refrigeration system based on $\mathrm{R}-134$ a refrigerant having $185 \mathrm{~kJ} \mathrm{~kg}^{-1}$ cooling capacity. COP of the system is 4.2 and overall efficiency of the compressor is $80 \%$. Specific volume of the refrigerant vapour at suction temperature is $0.15 \mathrm{~m}^{3} \mathrm{~kg}^{-1}$. The compressor with bore diameters of $40 \mathrm{~mm}$ each runs at $1440 \mathrm{rpm}$.The compressor stroke length in $\mathrm{mm}$ is (A) 16.8 (B) 33.7 (C) 50.5 (D) 67.4

## Question ID - 157402 | Toppr Answer A 1 hp motor is used for running a dual cylinder reciprocating compressor of a refrigeration system based on $\mathrm{R}-134$ a refrigerant having $185 \mathrm{~kJ} \mathrm{~kg}^{-1}$ cooling capacity. COP of the system is 4.2 and overall efficiency of the compressor is $80 \%$. Specific volume of the refrigerant vapour at suction temperature is $0.15 \mathrm{~m}^{3} \mathrm{~kg}^{-1}$. The compressor with bore diameters of $40 \mathrm{~mm}$ each runs at $1440 \mathrm{rpm}$.The compressor stroke length in $\mathrm{mm}$ is (A) 16.8 (B) 33.7 (C) 50.5 (D) 67.4

1 Answer - 5876 Votes

3537

Answer Key : (B) -

(B) 33.7