SSC CGL Pipes and Cisterns Practice Test 5
15 SSC CGL pipes and cisterns questions with chapter-wise explanations and exam-style options.
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SSC CGL Pipes and Cisterns Practice Test 5
15 SSC CGL pipes and cisterns questions with chapter-wise explanations and exam-style options.
Preview all 15 questions in SSC CGL Pipes and Cisterns Practice Test 5 (no login required)
- Pipes and Cisterns
1. A can complete a work in 12 days. What part of the work does A complete in 1 day?
- A. 1/10
- B. 1/12 (Correct)
- C. 1/14
- D. 1/15
Explanation: One-day work is the reciprocal of total days.
- Pipes and Cisterns
2. A can do a work in 10 days and B in 15 days. Working together, they finish it in:
- A. 4 days
- B. 5 days
- C. 6 days (Correct)
- D. 7.5 days
Explanation: Combined rate = 1/10 + 1/15 = 1/6.
- Pipes and Cisterns
3. If A is twice as efficient as B and B takes 18 days, A alone will take:
- A. 6 days
- B. 8 days
- C. 9 days (Correct)
- D. 12 days
Explanation: Twice efficiency means half the time.
- Pipes and Cisterns
4. A and B together earn Rs. 360 for a job. If their efficiencies are in the ratio 2:1, A's share is:
- A. Rs. 120
- B. Rs. 180
- C. Rs. 240 (Correct)
- D. Rs. 270
Explanation: A gets 2/3 of the total amount.
- Pipes and Cisterns
5. A pipe fills a tank in 8 hours. In 1 hour it fills:
- A. 1/4
- B. 1/6
- C. 1/8 (Correct)
- D. 1/10
Explanation: One-hour filling rate is 1/8 of the tank.
- Pipes and Cisterns
6. A pipe fills a tank in 6 hours and another empties it in 12 hours. If both are opened together, the tank fills in:
- A. 4 hours
- B. 6 hours
- C. 8 hours
- D. 12 hours (Correct)
Explanation: Net rate = 1/6 - 1/12 = 1/12.
- Pipes and Cisterns
7. A can do a work in 12 days and B in 15 days. If they work on alternate days starting with A, the work is finished in:
- A. 12 days
- B. 13 days
- C. 14 days (Correct)
- D. 15 days
Explanation: In 2 days they do 1/12 + 1/15 = 3/20. After 12 days (6 cycles) 18/20 is done. Day 13 (A): 1/12 = 5/60 more, leaving 1/60. Day 14 (B): 1/15 = 4/60 ≥ 1/60, B finishes. Work is done in 14 days.
- Pipes and Cisterns
8. B can finish a job in 20 days. In 5 days B completes:
- A. 1/5
- B. 1/4 (Correct)
- C. 1/3
- D. 2/5
Explanation: In 5 days, B completes 5/20 = 1/4 of the work.
- Pipes and Cisterns
9. If 8 men can complete a work in 15 days, 12 men can complete the same work in:
- A. 8 days
- B. 10 days (Correct)
- C. 12 days
- D. 14 days
Explanation: Men x days is constant, so 8 x 15 = 12 x d.
- Pipes and Cisterns
10. A:B = 3:2 in efficiency. If A takes 8 days, B will take:
- A. 10 days
- B. 12 days (Correct)
- C. 14 days
- D. 16 days
Explanation: Time is inversely proportional to efficiency.
- Pipes and Cisterns
11. A and B can do a work in 12 days, and B alone can do it in 20 days. A alone can do it in:
- A. 24 days
- B. 28 days
- C. 30 days (Correct)
- D. 36 days
Explanation: A's rate = 1/12 - 1/20 = 1/30.
- Pipes and Cisterns
12. A pipe can fill 3/5 of a tank in 6 hours. It can fill the full tank in:
- A. 8 hours
- B. 9 hours
- C. 10 hours (Correct)
- D. 12 hours
Explanation: If 3/5 is filled in 6 hours, full tank takes 6 x 5/3 = 10 hours.
- Pipes and Cisterns
13. If A and B do the same work and A works 6 days while B works 4 days, their wages are shared in the ratio:
- A. 2:3
- B. 3:2 (Correct)
- C. 4:3
- D. 5:4
Explanation: Wages are proportional to work done.
- Pipes and Cisterns
14. A worker's efficiency increases by 25%. The time taken to finish the same work decreases by:
- A. 15%
- B. 20% (Correct)
- C. 25%
- D. 30%
Explanation: Time is inversely proportional to efficiency, so new time = 1/1.25 = 80% of old time.
- Pipes and Cisterns
15. If 5 workers complete a task in 18 days, the total work is:
- A. 80 worker-days
- B. 85 worker-days
- C. 90 worker-days (Correct)
- D. 95 worker-days
Explanation: Total work = 5 x 18 = 90 worker-days.