Pumping

Question 1

When opened, water from the discharge side of the pump is sent to the water tank through a ____.

Answer 1

1⁄2” line

Question 2

Used to shut-off the main intake relief valve. The valve is to be left on at all times, but can be closed if incoming pressure greater than ____ is desired

Answer 2

250 psi

Question 3

The Waterous fire pump is classified as a ____ since it does not pump a definite amount of water with each revolution.

Answer 3

non-positive displacement pump

Question 4

Rather, it imparts ___ to the water and coverts it to pressure within the pump itself.

Answer 4

velocity

Question 5

the centrifugal pump consists of two primary parts: ____.

Answer 5

an impeller(s) and housing

Question 6

The impeller is mounted ____ in the housing. This placement creates a water passage that ___ in cross sectional area as it nears the discharge outlet of the pump. This section of the pump is known as the volute.

Answer 6

off center / gradually increases

Question 7

The first indication that wear is becoming a problem in the pump is when____ is required to pump the rated capacity in pump tests.

Answer 7

increased engine rpm

Question 8

The two impellers are ___ in size, have the same capacity each and share a single shaft.

Answer 8

identical

Question 9

Whenever the pump is delivering more than approximately ____ of its rated capacity of 1500 gpm, the parallel (volume) position should be selected on the transfer valve.

Answer 9

70%

Question 10

Engaging Pump :
The transmission defaults to ____ when placed
in pump.

Answer 10

4th gear

Question 11

Manual Pump Shift Procedure:

1. Shift transmission to____
2. Move cab pump shift lever to the down (_____) position.

Answer 11

N (Neutral) / pump engaged

Question 12

Manual Pump Shift Procedure:
3. _____ pump manual control (located behind the right side pump panel) out as far as
it will go.
4. Shift transmission into ___. Visually inspect underside of apparatus to verify
driveshaft is turning at pump input.

Answer 12

Pull out / D (Drive)

Question 13

Operate priming pump until main suction gauge shows a vacuum of approximately
____ and main pressure gauge shows a positive pressure.

Answer 13

20” of Hg

Question 14

NOTE: If you are not

able to achieve prime within ___, stop and investigate.

Answer 14

45 seconds

Question 15

Discharge pressure must be at ____ greater than intake pressure in order for the relief valve to operate properly.

Answer 15

least 50 psi