## Lakshya Education MCQs

Question: Volumetric efficiency of a compressor decreases with ________ in compression ratio.
Options:
 A. Decrease B. Increase C. Remain same D. Does not change
Explanation :

Earn Reward Points by submitting Detailed Explaination for this Question

## More Questions on This Topic :

Question 1. If p₁, is the pressure of air entering the l.p. cylinder and p₂ is the pressure of air leaving the l.p. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where d₁ = dia. of l.p. cylinder, and d₂ = dia. of h.p. cylinder)
1.     D₁/D₂ = p₁ p₂
2.     D₁/D₂ = p₁/p₂
3.     D₁/D₂ = p₂/p₁
4.     None of these
Explanation :
Question 2. The pressure and temperature conditions of air at the suction of compressor are
1.     Atmospheric
2.     Slightly more than atmospheric
3.     Slightly less than atmospheric
4.     Pressure slightly less than atmospheric and temperature slightly more than atmospheric
Explanation :
Question 3. Volumetric efficiency of a compressor decreases with ________ in compression ratio.
1.     Decrease
2.     Increase
3.     Remain same
4.     Does not change
Explanation :
Question 4. The pressure and temperature conditions of air at the suction of compressor are
1.     Atmospheric
2.     Slightly more than atmospheric
3.     Slightly less than atmospheric
4.     Pressure slightly less than atmospheric and temperature slightly more than atmospheric
Explanation :
Question 5. If p₁ is the pressure of air entering the l.p, cylinder and p₃ is the pressure of air leaving the h.p. cylinder, then the ratio of cylinder diameters for a single acting, two stage reciprocating compressor with complete intercooling is given by
1.     D₁/D₂ = (p₁ p₃)1/2
2.     D₁/D₂ = (p₁/p₃)1/4
3.     D₁/D₂ = (p₁ p₃)1/4
4.     D₁/D₂ = (p₃/p₁)1/4