Chapter 9

Question 1

Which type of positive displacement pump is the simplest of all fire apparatus pumps, from the standpoint of design?

a. Gated pump
b. Rotary pump
c. Inline pump
d. Piston pump

Answer 1

b. Rotary pump

Question 2

What is the function of a booster line cooling valve?

a. Circulates tank water through a heat exchanger
b. Allows water to remain in the tank
c. Diverts a portion of discharge water into the tank
d. Receives water from two directions

Answer 2

c. Diverts a portion of discharge water into the tank

Question 3

For which of the following pumps is pressure determined by changes in the vehicle’s speed?

a. Midship pump
b. Power-take off (PTO) drive
c. Auxiliary engine driven pump
d. Front-mount pump

Answer 3

b. Power-take off (PTO) drive

Question 4

Pressure control devices that are a part of a fire apparatus pumping system must restrict the pressure from exceeding:

a. 70 psi (490 kPa) above the set level.
b. 10 psi (70 kPa) above the set level.
c. 20 psi (140 kPa) above the set level.
d. 30 psi (210 kPa) above the set level.

Answer 4

d. 30 psi (210 kPa) above the set level

Question 5

Which of the following uses a compressor to supply an airline to a jet pump creating a Venturi Effect that primes the pump using no moving parts or lubricants?

a. Exhaust primers
b. Vacuum primers
c. Positive displacement primers
d. Air primers

Answer 5

d. Air primers

Question 6

It is generally recommended that intake relief valves be set to open when intake pressure rises more than:

a. 10 psi (70 kPa) above the necessary operating pressure.
b. 5 psi (35 kPa) above the necessary operating pressure.
c. 20 psi (140 ka) above the necessary operating pressure.
d. 30 psi (210 kPa) above the necessary operating pressure.

Answer 6

a. 10 psi (70 kPa) above the necessary operating pressure

Question 7

Single-stage centrifugal fire pumps use a single intake impeller and a simple casing to provide flow capacities up to:

a. 500 gpm (2 000 L/min).
b. 1,000 gpm (4 000 L/min).
c. 3,500 gpm (14 000 L/min).
d. 2,250 gpm (9 000 L/min).

Answer 7

d. 2,250 gpm (9 000 L/min).

Question 8

Which pump design offers advantages such as more even weight distribution on the chassis and more usable compartment space?

a. Midship pump
b. Power-take-off (PTO) drive
c. Front-mount pump
d. Auxiliary engine driven pump

Answer 8

c. Front-mount pump