Pipes and Cisterns Questions: Quantitative Aptitude Quiz

1. Inlet Pipe : A pipe used to fill the tank or cistern is known as Inlet Pipe.
2. Outlet Pipe : A pipe used to empty the tank or cistern is known as Outlet Pipe.
3. If an inlet pipe can fill the tank in x hours, then the part filled in 1 hour = 1/x
4. If an outlet pipe can empty the tank in y hours, then the part of the tank emptied in 1 hour = 1/y
5. If a pipe can fill a tank in x hours and another pipe can empty the full tank in y hours ( where y > x), then on opening both the pipes, the net part filled in 1 hours = ( 1 / x – 1 / y ).
6. If a pipe can fill a tank in x hours and another pipe can empty the full tank in y hours ( where x > y), then on opening both the pipes, the net part emptied in 1 hours = ( 1 / y – 1 / x ).
7. Suppose that pipe ‘A’ fills the tank as fast as the other pipe ‘B’. If pipe ‘B’ (slower) & pipe ‘A’ (faster) take ‘x’ min & ‘x/n’ min respectively to fill up an empty tank together, then part of the tank filled in 1 hour = (n+1)/x

Pipes and Cisterns Questions and Quiz:

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1. An electric pump can fill a tank in 3 hours. Because of a leak in the tank, it took 3 ½ hours to fill the tank. The leak can drain out of all the water of the tank in:

 18 hours

 25 hours

 21 hours

 32 hours

Question 1 of 10

2. Two pipes can fill a tank in 10 and 14 minutes respectively and a waste pipe can empty 4 gallons per minute. If all the pipes working together can fill the tank in 6 minutes, what is the capacity of the tank?

 840 gallons

 930 gallons

 720 gallons

 680 gallons

Question 2 of 10

3. A water tank is two-fifth full.Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes.If both the pipes are open,how long will it take to empty or fill the tank completely?

 9 min.to empty

 6 min.to fill

 12 min.to fill

 6 min.to empty

Question 3 of 10

4. 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. The time required by the first pipe is:

 21 hours

 18 hours

 15 hours

 24 hours

Question 4 of 10

5. Two pipes A and B can fill a cistern in 75/2 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the B is turned off after:

 6 min.

 9 min.

 12 min.

 15 min.

Question 5 of 10

6. 12 buckets of water fill a taken when the capacity of each bucked is 13.5 liter. How many buckets will be needed to fill the same tank, if the capacity of each bucket is 9 litres ?

 18

 21

 25

 16

Question 6 of 10

7. A booster pump can be used to fill as to empty the tank. The capacity of the tank is 1200m³. The emptying capacity of the tank is 10m³ per minute higher than its filling capacity and the pump requires 4 minutes lesser to vacant the tank than it requires to fill it. Calculate the filling capacity of the pump.

 40

 35

 45

 50

Question 7 of 10

8. A tank is filled in eight hours by three pipes A, B and C. Pipe A is twice as fast as pipe B, and B is twice as fast as C. How much time will pipe B alone take to fill the tank?

 46 hours

 32 hours

 28 hours

 14 hours

Question 8 of 10

9. 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 cistern is:

 24 hours

 12 hours

 14 hours

 21 hours

Question 9 of 10

10. Two pipes can fill a tank in 8 hrs & 6 hrs respectively. If they are opened on alternate hours and if pipe A gets opened first, then in how many hours, the tank will be full?

 5 hours

 7 hours

 9 hours

 11 hours

Question 10 of 10

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