TB Apparatus P-3

Question 0

When in line pumping ops are implemented , ____ hose shall be the initial supply line

Answer 0

3 1/2

Question 1

What is the pump idle pressure ?

Answer 1

Lowest RPMS (55 psi in volume , 110 in pressure) plus hydrant pressure equals pump idle pressure
Eg if hydrant pressure 50 psi then pump idle pressure in volume would be 105 psi

Question 2

T or F

When charging the pump from a hydrant, insure all drains and inlets are in the closed position

Answer 2

True

Next, open the hydrant fully

Question 3

When supplying water into any gated inlet , the inlet MUST be ____

Answer 3

Opened fully

Note: if going into a gated inlet , open the drain to the gated inlet to expel air PRIOR to opening the gated inlet

Question 4

When residual pressure drops below ____ psi on the intake pressure gauge , augmentation will be required

Answer 4

15 Psi

Question 5

1 3/4 hose with 1 5/16 nozzle = ___ psi at nozzle plus ___ psi per length friction loss

Answer 5

50 psi at nozzle and 20 psi per length

Question 6

2 1/2 inch hose with 1 1/8 nozzle =

Answer 6

40 psi at nozzle plus 5 psi per length

Note: 5 psi for each floor above grade