QUIZ on PIPE and CISTERN

 

📚 Pipes & Cisterns MCQ Test

UPSC Principal | KVS | NVS | EMRS Competitive Exam

50 Questions | Practice Test

Instructions

• Total Questions: 50
• Each question has four options.
• Select the most appropriate answer.
• Click Submit Test after completing the test.
• Your score and answer review will be displayed automatically.

Q1. Pipe A fills a tank in 12 hours and Pipe B fills it in 18 hours. How long will they take together?

A. 6 hours B. 7 hours 12 minutes C. 7 hours 30 minutes D. 8 hours

Q2. A fills a tank in 15 hours and B fills it in 20 hours. What fraction of the tank will remain empty after both work for 4 hours?

A. 1/3 B. 2/5 C. 7/15 D. 8/15

Q3. Two pipes fill a tank in 24 hours and 36 hours respectively. How long will they take to fill 5/6 of the tank together?

A. 9 hours B. 10 hours C. 12 hours D. 15 hours

Q4. A and B together fill a tank in 8 hours. A alone fills it in 12 hours. How long will B alone take?

A. 18 hours B. 20 hours C. 24 hours D. 30 hours

Q5. A and B together fill a tank in 10 hours. B alone fills it in 15 hours. How long will A alone take?

A. 20 hours B. 25 hours C. 30 hours D. 35 hours

Q6. A pipe fills a tank in 10 hours while an outlet empties it in 15 hours. How long will the tank take to fill when both are open?

A. 20 hours B. 25 hours C. 30 hours D. 35 hours

Q7. An inlet fills a tank in 8 hours and an outlet empties it in 12 hours. What fraction of the tank will be filled in 3 hours when both are open?

A. 1/8 B. 1/4 C. 3/8 D. 1/2

Q8. A fills a tank in 12 hours, B in 18 hours and C empties it in 36 hours. How long will all three together take to fill the tank?

A. 8 hours B. 9 hours C. 10 hours D. 12 hours

Q9. A fills a tank in 15 hours while B empties it in 20 hours. How long will an empty tank take to fill when both are open?

A. 30 hours B. 45 hours C. 60 hours D. 75 hours

Q10. A pipe fills a tank in 6 hours and a leak empties it in 9 hours. How long will the tank take to fill?

A. 18 hours B. 12 hours C. 15 hours D. 24 hours

Q11. A pipe fills a tank in 12 hours. Due to a leak, it takes 15 hours. How long will the leak alone take to empty the tank?

A. 45 hours B. 50 hours C. 60 hours D. 75 hours

Q12. A tank fills in 8 hours without a leak and in 10 hours with the leak. How long would the leak alone take to empty it?

A. 30 hours B. 35 hours C. 40 hours D. 45 hours

Q13. A fills a tank in 6 hours and B fills it in 9 hours. How long will they take together?

A. 3 hours B. 3 hours 36 minutes C. 4 hours D. 4 hours 30 minutes

Q14. A fills a tank in 10 hours, B in 15 hours and C empties it in 30 hours. Find the net filling time.

A. 6 hours B. 7 hours C. 7 hours 30 minutes D. 10 hours

Q15. Two pipes fill a tank in 12 and 18 hours respectively, while a leak empties it in 36 hours. Find the filling time when all are open.

A. 6 hours B. 8 hours C. 9 hours D. 12 hours

Q16. A tank is 1/3 full. A fills it in 12 hours and an outlet empties it in 18 hours. How long will it take to fill completely?

A. 12 hours B. 18 hours C. 24 hours D. 36 hours

Q17. A tank is 40% full. An inlet fills it in 10 hours and an outlet empties it in 20 hours. How long will it take to fill completely?

A. 8 hours B. 10 hours C. 12 hours D. 15 hours

Q18. A tank is 3/5 full. An inlet fills it in 15 hours and an outlet empties it in 30 hours. Find the time required to fill the tank completely.

A. 8 hours B. 10 hours C. 12 hours D. 15 hours

Q19. A tank is half full. A fills it in 8 hours and B empties it in 12 hours. How long will it take to fill completely when both are open?

A. 8 hours B. 10 hours C. 12 hours D. 16 hours

Q20. A tank is 1/4 full. A fills it in 6 hours and B empties it in 18 hours. Find the time required to fill the tank.

A. 6 hours B. 8 hours C. 9 hours D. 12 hours

Q21. A is 50% more efficient than B. If B fills a tank in 12 hours, how long will A take?

A. 6 hours B. 8 hours C. 9 hours D. 10 hours

Q22. A takes 25% less time than B. If B fills the tank in 20 hours, how long will A take?

A. 12 hours B. 15 hours C. 16 hours D. 18 hours

Q23. The efficiency ratio of A and B is 3:2. Together they fill a tank in 10 hours. How long will A alone take?

A. 12 hours B. 15 hours C. 16⅔ hours D. 20 hours

Q24. A is twice as efficient as B. Together they fill a tank in 6 hours. How long will A alone take?

A. 8 hours B. 9 hours C. 12 hours D. 18 hours

Q25. A is 50% more efficient than B. Together they fill a tank in 8 hours. How long will B alone take?

A. 12 hours B. 16 hours C. 20 hours D. 24 hours

Q26. A fills a tank in 12 hours and B in 18 hours. Both work for 4 hours and then A is closed. How much longer will B take to fill the tank?

A. 4 hours B. 5 hours C. 5 hours 20 minutes D. 6 hours

Q27. A fills a tank in 10 hours and B in 15 hours. Both work for 2 hours and then B is closed. How long will A take to finish the tank?

A. 8 hours B. 9 hours C. 10 hours D. 12 hours

Q28. A fills a tank in 8 hours and B in 12 hours. Both work for 3 hours and then B is closed. How much more time will A require?

A. 3 hours B. 4 hours C. 5 hours D. 6 hours

Q29. A fills a tank in 12 hours and B empties it in 24 hours. Both work for 4 hours and then B is closed. How long will the tank take in total to fill?

A. 8 hours B. 10 hours C. 14 hours D. 16 hours

Q30. A fills a tank in 10 hours and B empties it in 20 hours. Both work for 5 hours and then B is closed. Find the total filling time.

A. 10 hours B. 12 hours C. 12.5 hours D. 15 hours

Q31. A fills a tank in 6 hours and B in 8 hours. They work alternately for one hour each, starting with A. When will the tank be full?

A. 6 hours B. 6 hours 45 minutes C. 7 hours D. 8 hours

Q32. A fills a tank in 8 hours and B in 12 hours. They work alternately for one hour each, starting with A. Find the filling time.

A. 9 hours B. 10 hours C. 11 hours D. 12 hours

Q33. A fills a tank in 10 hours and B in 15 hours. They work alternately for one hour each, starting with B. When will the tank be full?

A. 10 hours B. 12 hours C. 13 hours D. 15 hours

Q34. A fills a tank in 12 hours and B in 18 hours. A works for 2 hours and B for 3 hours. Then both work together. How long will the tank take in total?

A. 8 hours B. 9 hours C. 9 hours 48 minutes D. 12 hours

Q35. A fills a tank in 6 hours and B in 9 hours. A works for 2 hours and B for 3 hours. What fraction of the tank remains empty?

A. 1/6 B. 1/4 C. 1/3 D. 1/2

Q36. A, B and C fill a tank in 12, 18 and 36 hours respectively. How much of the tank will they fill in 4 hours together?

A. 1/2 B. 2/3 C. 3/4 D. 5/6

Q37. A fills a tank in 16 hours and B in 24 hours. Both work for 4 hours and then A is closed. Find the total time required.

A. 12 hours B. 13 hours 20 minutes C. 15 hours D. 16 hours

Q38. A fills a tank in 15 hours, B in 20 hours and C empties it in 30 hours. How much will be filled in 6 hours?

A. 1/4 B. 1/3 C. 1/2 D. 2/3

Q39. A fills a tank in 20 hours and B in 30 hours. How long will they take together to fill 3/4 of the tank?

A. 8 hours B. 9 hours C. 10 hours D. 12 hours

Q40. A fills a tank in 8 hours, B in 16 hours and C empties it in 32 hours. How long will they take to fill 7/8 of the tank?

A. 5 hours B. 5 hours 36 minutes C. 6 hours D. 8 hours

Q41. A fills a school overhead tank in 10 hours. B is 50% more efficient than A and C empties the tank in 15 hours. How long will all three take together?

A. 6 hours B. 7 hours 30 minutes C. 8 hours D. 10 hours

Q42. A fills a tank in 12 hours, B in 18 hours and C empties it in 36 hours. A works alone for 3 hours and then B and C are also opened. Find the total filling time.

A. 8 hours B. 9 hours C. 10 hours D. 12 hours

Q43. A fills a tank in 10 hours and B empties it in 15 hours. If the tank is already 40% full, how long will it take to become full?

A. 6 hours B. 8 hours C. 9 hours D. 10 hours

Q44. A pipe fills a tank in 12 hours. Due to a leak, it takes 15 hours. What is the rate of the leak?

A. 1/36 tank/hour B. 1/48 tank/hour C. 1/60 tank/hour D. 1/72 tank/hour

Q45. A pipe fills a tank in 9 hours and another empties it in 18 hours. If the tank is 1/3 full, how long will it take to become full?

A. 8 hours B. 10 hours C. 12 hours D. 15 hours

Q46. A fills a tank in 12 hours. B is 50% more efficient than A and C empties it in 18 hours. How long will all three take together?

A. 6 hours B. 8 hours C. 9 hours D. 12 hours

Q47. A and B together fill a tank in 6 hours. A alone fills it in 10 hours. By what percentage is B more efficient than A?

A. 40% B. 50% C. 60% D. 66⅔%

Q48. A fills a tank in 12 hours and B in 20 hours. They work together for 3 hours, after which a leak that empties the tank in 30 hours is opened. Find the total filling time.

A. 7 hours B. 8 hours C. 9 hours D. 10 hours

Q49. A fills a tank in 15 hours. B is 20% less efficient than A and C empties the tank in 30 hours. Find the time required when all are open.

A. 15 hours B. 18 hours C. 20 hours D. 24 hours

Q50. A fills a tank in 12 hours and B in 18 hours. A leak empties it in 36 hours. A and B work together for 4 hours and then the leak is opened. How long will the tank take in total?

A. 7 hours B. 8 hours C. 9 hours D. 10 hours

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