Sunday, 31 July 2016

Prepare for Punjab National Bank Exams with Pipes and Cistern Problems

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Punjab National Bank exams preparation with these aptitude questions. Make use of these solved aptitude questions.

1. One pipe can fill a tank four times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in:
A. 180 min    B. 144 min.
C. 126 min    D. 114 min

2. Two taps A and B can fill a tank in 5 hours and 20 hours respectively. If both the taps are open then due to a leakage, it took 40 minutes more to fill the tank. If the tank is full, how long will it take for the leakage alone to empty the tank?
A. 28 hr    B. 16 hr
C. 22 hr    D. 32 hr

3. Two pipes A and B can fill a tank in 2 and 6 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?
A. 3 min    B. 2.5 min
C. 2 min    D. 1.5 min

4. Bucket P has thrice the capacity as bucket Q. It takes 80 turns for bucket P to fill the empty drum. How many turns it will take for both the buckets P and Q, having each turn together to fill the empty drum?
A. 30    B. 45
C. 60    D. 80

5. Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is:
A. 10    B. 12
C. 14    D. 16

6. Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern separately?
A. 6 hours    B. 2 hours
C. 4 hours    D. 3 hours

7. Two pipes A and B can fill a cistern in 37 1/2 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if pipe B is turned off after
A. 5 min    B. 9 min
C. 10 min    D. 15 min

8. A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. Time required by the first pipe to fill the tank is
A. 30 hours    B. 15 hours
C. 10 hours    D. 6 hours

9. A tank is filled in 10 hours by three pipes A, B and C. Pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank?
A. 70 hours    B. 30 hours
C. 35 hours    D. 50 hours

10. A leak in the bottom of a tank can empty the full tank in 6 hours. An inlet pipe fills water at the rate of 4 liters a minute. When the tank is full, the inlet is opened and due to the leak, the tank is empty in 24 hours. How many liters does the tank hold?
A. 4010 litre    B. 2220 litre
C. 1920 litre    D. 2020 litre

Answers :
1. A    2. A    3. D    4. C    5. C
6. A    7. B    8. B    9. A    10. C

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