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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
 Discuss Question
Answer: Option C. ->  D₁/D₂ = p₂/p₁
Explanation :
Question 2. 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
 Discuss Question
Answer: Option D. ->  D₁/D₂ = (p₃/p₁)1/4
Explanation :
Question 3. 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
 Discuss Question
Answer: Option D. ->  D₁/D₂ = (p₃/p₁)1/4
Explanation :
Question 4. In n₁ and n₂ are the indices of compression for the first and second stage of compression, then the ratio of work-done on the first and second stages (w₁/w₂) with perfect intercooling is given by
  1.     W₁/W₂ = n₂(n₁ - 1)/n₁(n₂ - 1)
  2.     W₁/W₂ = n₁(n₂ - 1)/n₂(n₁ - 1)
  3.     W₁/W₂ = n₁/n₂
  4.     W₁/W₂ = n₂/n₁
 Discuss Question
Answer: Option B. ->  W₁/W₂ = n₁(n₂ - 1)/n₂(n₁ - 1)
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
 Discuss Question
Answer: Option D. ->  D₁/D₂ = (p₃/p₁)1/4
Explanation :
Question 6. 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
 Discuss Question
Answer: Option C. ->  D₁/D₂ = p₂/p₁
Explanation :
Question 7. In n₁ and n₂ are the indices of compression for the first and second stage of compression, then the ratio of work-done on the first and second stages (w₁/w₂) with perfect intercooling is given by
  1.     W₁/W₂ = n₂(n₁ - 1)/n₁(n₂ - 1)
  2.     W₁/W₂ = n₁(n₂ - 1)/n₂(n₁ - 1)
  3.     W₁/W₂ = n₁/n₂
  4.     W₁/W₂ = n₂/n₁
 Discuss Question
Answer: Option B. ->  W₁/W₂ = n₁(n₂ - 1)/n₂(n₁ - 1)
Explanation :
Question 8. 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
 Discuss Question
Answer: Option D. ->  D₁/D₂ = (p₃/p₁)1/4
Explanation :
Question 9. In n₁ and n₂ are the indices of compression for the first and second stage of compression, then the ratio of work-done on the first and second stages (w₁/w₂) with perfect intercooling is given by
  1.     W₁/W₂ = n₂(n₁ - 1)/n₁(n₂ - 1)
  2.     W₁/W₂ = n₁(n₂ - 1)/n₂(n₁ - 1)
  3.     W₁/W₂ = n₁/n₂
  4.     W₁/W₂ = n₂/n₁
 Discuss Question
Answer: Option B. ->  W₁/W₂ = n₁(n₂ - 1)/n₂(n₁ - 1)
Explanation :
Question 10. 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
 Discuss Question
Answer: Option C. ->  D₁/D₂ = p₂/p₁
Explanation :

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