PUMPING APPARATUS DRIVER
OPERATOR FINAL TEST 2023
COMPREHENSIVE SCRIPT 2026 COMPLETE
QUESTIONS AND SOLUTIONS GRADED A+
⩥ Depending on the specific pump, the first stage increases the pressure
and discharges. Answer: 50 to 70 percent of the volume capacity through
the transfer valve and into the eye of the second impeller
⩥ In the parallel mode, the pump will be capable of supplying 100
percent of its rated capacity at 150 psi. Answer: At 10 feet of lift with 20
feet of suction hose while drafting
⩥ Newer pumps use a power-operated transfer valve. This valve may be
activated by. Answer: Electricity, air pressure or by the water pressure
itself.
⩥ Many power-operated transfer valves operate at pressures. Answer: As
high as 200 psi
⩥ Clapper check valves. Answer: Are essential to the operation of a
multistage pump
,⩥ Should a valve stick open or closed, or be hampered by debris,.
Answer: The pump will not operate properly in series (pressure)
⩥ Some fire pumps have been constructed using up to four impellers.
Answer: Connected in a series to develop pressures up to 1,000 psi for
high pressure fog nozzles
⩥ When pressures higher than 250 psi are needed,. Answer: The separate
third stage is engaged and used to increase the pressure from the second
stage
⩥ A very close tolerance must be maintained between the pump casing
and the hub of the impeller.. Answer: This opening is usually limited to
.01 inch or less
⩥ As these impurities pass through the pump, they cause wear on the
impeller as. Answer: It turns at speeds of nearly 4,000 rpm when the
pump approaches its capacity .
⩥ Mechanical seals. Answer: Are the most common type in use today
⩥ Mechanical seals. Answer: Should not be allowed to freeze in cold
weather
,⩥ These seals must not be allowed. Answer: To run waterless for any
length of time as they will overheat and become damaged
⩥ The most common type of seal packing material is. Answer:
Composed of rope fibers impregnated with graphite or lead.
⩥ Some centrifugal fire pumps are equipped with. Answer: Ceramic or
mechanical seals that are not adjustable.
⩥ Heat develops by friction where the packing rings come into contact
with the shaft.. Answer: In order to over come this, a spacer, known as a
Lantern or Slinger Ring is supplied with the packing to provide cooling
⩥ The packing only receives water for. Answer: Lubrication if the pump
is full and operating under pressure
⩥ Most manufacturers recommend the pump to be drained between fire
calls,. Answer: Especially in cold weather conditions
⩥ Ceramic pump seals may also be available for use in certain pumps..
Answer: This material offers superior resistance to warping, stretching
and corrosion
⩥ Auxiliary Engine Driven Pumps. Answer: •Airport rescue firefighting
(ARFF) vehicles
, •Wildland fire apparatus
•Mobile water supply apparatus
•Trailer mounted fire pumps
•Portable fire pumps
⩥ Skid-mounted assembly that includes a small water tank, booster reel,
and small diameter attack lines. Answer: With a pumping capacity of
generally 500 gpm or less, some jurisdictions mount these assemblies on
pickup trucks
⩥ Conventional PTO units were limited to powering pumps up to
approximately 500 gpm.. Answer: However, some manufacturers now
provide full torque power take-offs that allow for the installation of
pumps as large as 1,250 gpm.
⩥ Front-Mount Pumps
The maximum capacity of the pump depends on the. Answer:
Limitations of the engine driving it, typically up to 1,250 gpm.
⩥ The gear ratio is set to match the engine torque curve to the speed of
the rotation required for the impeller to deliver the rated capacity of the
pump.. Answer: This ratio is arranged so that the impeller turns faster
than the engine, usually one and a half (1.5) to two and a half (2.5) times
as fast
OPERATOR FINAL TEST 2023
COMPREHENSIVE SCRIPT 2026 COMPLETE
QUESTIONS AND SOLUTIONS GRADED A+
⩥ Depending on the specific pump, the first stage increases the pressure
and discharges. Answer: 50 to 70 percent of the volume capacity through
the transfer valve and into the eye of the second impeller
⩥ In the parallel mode, the pump will be capable of supplying 100
percent of its rated capacity at 150 psi. Answer: At 10 feet of lift with 20
feet of suction hose while drafting
⩥ Newer pumps use a power-operated transfer valve. This valve may be
activated by. Answer: Electricity, air pressure or by the water pressure
itself.
⩥ Many power-operated transfer valves operate at pressures. Answer: As
high as 200 psi
⩥ Clapper check valves. Answer: Are essential to the operation of a
multistage pump
,⩥ Should a valve stick open or closed, or be hampered by debris,.
Answer: The pump will not operate properly in series (pressure)
⩥ Some fire pumps have been constructed using up to four impellers.
Answer: Connected in a series to develop pressures up to 1,000 psi for
high pressure fog nozzles
⩥ When pressures higher than 250 psi are needed,. Answer: The separate
third stage is engaged and used to increase the pressure from the second
stage
⩥ A very close tolerance must be maintained between the pump casing
and the hub of the impeller.. Answer: This opening is usually limited to
.01 inch or less
⩥ As these impurities pass through the pump, they cause wear on the
impeller as. Answer: It turns at speeds of nearly 4,000 rpm when the
pump approaches its capacity .
⩥ Mechanical seals. Answer: Are the most common type in use today
⩥ Mechanical seals. Answer: Should not be allowed to freeze in cold
weather
,⩥ These seals must not be allowed. Answer: To run waterless for any
length of time as they will overheat and become damaged
⩥ The most common type of seal packing material is. Answer:
Composed of rope fibers impregnated with graphite or lead.
⩥ Some centrifugal fire pumps are equipped with. Answer: Ceramic or
mechanical seals that are not adjustable.
⩥ Heat develops by friction where the packing rings come into contact
with the shaft.. Answer: In order to over come this, a spacer, known as a
Lantern or Slinger Ring is supplied with the packing to provide cooling
⩥ The packing only receives water for. Answer: Lubrication if the pump
is full and operating under pressure
⩥ Most manufacturers recommend the pump to be drained between fire
calls,. Answer: Especially in cold weather conditions
⩥ Ceramic pump seals may also be available for use in certain pumps..
Answer: This material offers superior resistance to warping, stretching
and corrosion
⩥ Auxiliary Engine Driven Pumps. Answer: •Airport rescue firefighting
(ARFF) vehicles
, •Wildland fire apparatus
•Mobile water supply apparatus
•Trailer mounted fire pumps
•Portable fire pumps
⩥ Skid-mounted assembly that includes a small water tank, booster reel,
and small diameter attack lines. Answer: With a pumping capacity of
generally 500 gpm or less, some jurisdictions mount these assemblies on
pickup trucks
⩥ Conventional PTO units were limited to powering pumps up to
approximately 500 gpm.. Answer: However, some manufacturers now
provide full torque power take-offs that allow for the installation of
pumps as large as 1,250 gpm.
⩥ Front-Mount Pumps
The maximum capacity of the pump depends on the. Answer:
Limitations of the engine driving it, typically up to 1,250 gpm.
⩥ The gear ratio is set to match the engine torque curve to the speed of
the rotation required for the impeller to deliver the rated capacity of the
pump.. Answer: This ratio is arranged so that the impeller turns faster
than the engine, usually one and a half (1.5) to two and a half (2.5) times
as fast
