Take NFPA D O Apparatus Practice Questions - NFPA 1002 Driver/Operator - Apparatus (Pumper) Certification Exam Exam

QUESTION 1 / 25

What type of pump is used as the main pump on virtually all modern fire apparatus?

Choose one answer below.

APositive displacement piston pump✓BCentrifugal pump✓CRotary gear pump✓DDiaphragm pump✓

QUESTION 2 / 25

What is the primary purpose of the priming pump on a centrifugal-pump-equipped fire apparatus?

Choose one answer below.

ABoost discharge pressure during pumping✓BEvacuate air from the pump and intake hose to allow drafting✓CCool the engine when pumping✓DProvide auxiliary cooling water to the impeller✓

QUESTION 3 / 25

Cavitation in a centrifugal fire pump is best described as which of the following?

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AExcess water hammering the impeller blades✓BThe pump trying to deliver more water than it is receiving on the intake side✓CAir leaking from the discharge fittings✓DExcessive RPM with low engine temperature✓

QUESTION 4 / 25

Which of the following is a warning sign of pump cavitation?

Choose one answer below.

AEngine RPM drops while discharge pressure rises✓BEngine RPM increases but discharge pressure does not rise correspondingly✓CA steady, smooth purr from the pump panel✓DDischarge gauges read at static pressure✓

QUESTION 5 / 25

Net pump discharge pressure (NPDP) is calculated by which of the following?

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ADischarge pressure minus intake pressure (when intake is positive)✓BDischarge pressure plus intake pressure✓CIntake pressure minus elevation loss✓DDischarge pressure plus elevation gain✓

QUESTION 6 / 25

A two-stage centrifugal pump operating in volume (parallel) mode delivers which of the following?

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A100% of rated capacity at 50% of rated pressure✓B50% of rated capacity at 100% of rated pressure✓C100% of rated capacity at 100% of rated pressure✓D200% of rated capacity at 50% of rated pressure✓

QUESTION 7 / 25

When should a two-stage centrifugal pump be shifted from volume to pressure mode?

Choose one answer below.

AWhenever the engine is started✓BWhen the required flow is more than half the rated capacity✓CWhen the required flow is less than half the rated capacity AND higher pressure is needed✓DOnly while drafting from static sources✓

QUESTION 8 / 25

Per NFPA 1901, a Class A pumper rated at 1,500 gpm must be capable of delivering what percentage of rated capacity at 150 psi net pump discharge pressure?

Choose one answer below.

A50%✓B70%✓C100%✓D120%✓

QUESTION 9 / 25

At 200 psi net pump discharge pressure, a centrifugal pump must deliver what percentage of its rated capacity?

Choose one answer below.

A100%✓B70%✓C50%✓D30%✓

QUESTION 10 / 25

At 250 psi net pump discharge pressure, a centrifugal pump must deliver what percentage of its rated capacity?

Choose one answer below.

A100%✓B70%✓C50%✓D25%✓

QUESTION 11 / 25

Which of the following is a hydraulic pressure that exists in any closed water system?

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AFriction pressure✓BStatic pressure✓CResidual pressure✓DFlow pressure✓

QUESTION 12 / 25

Residual pressure is best defined as which of the following?

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AThe pressure stored in the water system when no water is flowing✓BThe pressure remaining at a test point while water is flowing✓CThe friction loss in a hose lay✓DThe discharge pressure at the pump panel✓

QUESTION 13 / 25

The impeller in a centrifugal pump increases water velocity and is converted to pressure in which component?

Choose one answer below.

AThe intake manifold✓BThe volute or diffuser✓CThe relief valve✓DThe transfer valve✓

QUESTION 14 / 25

Increasing the speed of a centrifugal pump impeller produces what effect on discharge pressure (assuming adequate intake)?

Choose one answer below.

ADischarge pressure decreases✓BDischarge pressure stays the same✓CDischarge pressure increases approximately with the square of the speed change✓DDischarge pressure increases proportionally to the cube of speed✓

QUESTION 15 / 25

When pumping from a hydrant, the pressure shown on the master intake (compound) gauge will typically read:

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ANegative pressure in inches of mercury✓BPositive pressure in psi✓CZero✓DAtmospheric pressure✓

QUESTION 16 / 25

When drafting, the compound intake gauge typically displays vacuum in:

Choose one answer below.

Apsi✓BInches of mercury (in. Hg)✓CBar✓DFeet of water✓

QUESTION 17 / 25

At sea level under ideal conditions, what is the theoretical maximum lift for drafting with a centrifugal pump?

Choose one answer below.

A10 ft✓B22 ft✓C33.9 ft✓D100 ft✓

QUESTION 18 / 25

When pumping from a hydrant, most departments teach that intake (residual) pressure should generally not be allowed to drop below approximately:

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A0 psi (atmospheric)✓B20 psi positive intake✓C50 psi positive intake✓D100 psi positive intake✓

QUESTION 19 / 25

Atmospheric pressure at sea level is approximately:

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A10.0 psi✓B14.7 psi✓C20.2 psi✓D33.9 psi✓

QUESTION 20 / 25

What is the primary purpose of the pump's transfer valve on a two-stage centrifugal pump?

Choose one answer below.

AEngage the pump from road operation✓BSwitch between volume (parallel) and pressure (series) modes✓COpen the relief valve during overpressure✓DDrain water from the pump after shutdown✓

QUESTION 21 / 25

The transfer valve on a two-stage pump should only be operated when discharge pressure is:

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AAbove 250 psi✓BAbove 150 psi✓CAt or below 50 psi✓DExactly at 100 psi✓

QUESTION 22 / 25

Which gauge displays the discharge pressure leaving the pump into the discharge manifold?

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ACompound gauge✓BMaster discharge gauge✓CTachometer✓DPyrometer✓

QUESTION 23 / 25

Per NFPA 1911, daily or pre-trip inspection of an in-service fire apparatus must include checking which of the following?

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AOnly the engine oil level✓BTire condition and inflation pressure✓CPump performance testing✓DAnnual hose service test✓

QUESTION 24 / 25

Which document is most commonly referenced for in-service inspection, maintenance, and testing of fire apparatus?

Choose one answer below.

ANFPA 1001✓BNFPA 1500✓CNFPA 1901✓DNFPA 1911✓

QUESTION 25 / 25

What is the recommended action if the engine oil level is below the manufacturer's minimum mark during a pre-trip check?

Choose one answer below.

AAdd oil to bring it above the maximum mark to provide a safety margin✓BAdd oil only to the proper level and report the consumption to the maintenance shop✓CIgnore it until the next service interval✓DTake the apparatus out of service immediately even if only slightly low✓