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Pumping book > Ch.9 > Flashcards

Ch.9 Flashcards

1
Q

Most common actuators for ball type valves are either ___________ or _______ handles?

A

Push pull handles
Quarters turn handles

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2
Q

Tanks greater than 1000 gallons must be provided with at least______ inch tank full line? 

A

2 inch

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3
Q

A pump that consists of two gears that rotate in a tightly meshed pattern inside a watertight case?

A

Rotary gear pump

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4
Q

According to NFPA 1901 pumpers with capacities of 500 GPM should have piping capable of flowing_______ gpm? 

A

250gpm

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5
Q

__________ _________ pumps Are constructed with movable elements that automatically compensate for wear, maintaining a tighter fit with closer clearances as the pump is used?

A

Rotary vane pumps

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6
Q

Pumps rated less than______ gpm are required to have only one 2 1/2” discharge ?

A

750 gpm

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7
Q

This gauge is usually calibrated from ___ to ___ psi of positive pressure and from __ to __ inches of mercury on the negative side?

A

0 to 600 psi
0 to 30 psi

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8
Q

It is generally recommended that the intake relief valves be set to open when the intake pressure rises more than_____ psi above the operating pressure?

A

10 psi

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9
Q

The process of switching between pressure and volume is sometimes referred to as?

A

Changeover

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10
Q

All valves should be designed and maintain so that they are easily operable at pressures of up to ____ psi? 

A

250psi

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11
Q

NFPA 1901 requires that all intakes or discharges that are____ Inches or greater be equipped with slow acting valve controls, prevents open to close in less than____ seconds 

A

3 inches
3 seconds

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12
Q

Automatic valve that permits liquid to flow in only One Direction? 

A

Check valve

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13
Q

What seals are the most common type in use today?

A

Mechanical seals

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14
Q

Self priming pump that utilizes a piston or interlocking rotors to move a given amount of fluid through the pump chamber with each stroke of the piston or rotation of the rotors? 

A

Positive displacement pump

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15
Q

The electric governor also features cavitation protection by returning the engine to idle went into pressure drops below______ psi ?

A

30 psi

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16
Q

Many power operated transfer valves operate at pressures as a high as ____ psi?

A

200 psi

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17
Q

Pumps rates for _____ gpm or greater must be equipped with at least 2 , two in half discharges ?

A

750gpm

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18
Q

Pumps rated greater than _______ gpm capacity may require more than one large intake connection at each location ?

A

1500 gpm

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19
Q

Front mount pumps have capacities of up to ____ gpm?

A

1250gpm

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20
Q

Early pumps used by the fire service were ________________ pumps?

A

Hand operated piston pumps

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21
Q

These pumps are “constant flow machines “ in that they produce the same flow at a given speed regardless of discharge pressure?

A

Positive displacement pumps

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22
Q

Although no longer used as high capacity pumps , some are still in service for high pressure stream fire fighting , these multi cylinder ,PTO driven pumps can provide pressures up to 1000 psi for high pressure fog lines

A

Piston pumps

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23
Q

Most of the rotary pumps in use today are either ________ or ________ construction?

A

Rotary gear or rotary vane

24
Q

To prevent damage to the casings , most rotary gear pumps feature gears made of ________ or another soft metal , while a strong alloy such as cast iron is used for the pump casing?

A

Bronze

25
Q

This is one of the most common types of pumps used to prime a centrifugal fire pump?

A

Rotary vane pump

26
Q

________ pumps are prone to failure if not exercised regularly, these pumps should be operated during routine apparatus checks ?

A

Rotary pumps

27
Q

This pump is classified as a non positive displacement pump as it does not pump a definite amount of water with each revolution?

A

Centrifugal pump

28
Q

A _________ pump is unable to pump air and is not self priming ?

A

Centrifugal pump

29
Q

What are the two basic centrifugal pumps used by the fire service ?

A

Single stage and multistage

30
Q

Pumps used in the fire service constructed with a single impeller are referred to as ______________pumps?

A

Single stage centrifugal pumps

31
Q

_____________ centrifugal pumps have an impeller for each stage mounted in a single housing?

A

Multistage

32
Q

I’m multistage centrifugal pumps , each of the impellers is capable of delivering it’s rated pressure while flowing ____% of its rated capacity ?

A

50%

33
Q

If there is any question as to the correct position for the transfer valve , it is best to operate in _____ rather than _____ mode?

A

Volume mode
Pressure mode

34
Q

In parallel mode (volume) the pump will be capable of supplying 100% of its rated capacity at ___psi at 10 feet of lift and 20 feet of suction hose while drafting?

A

150psi

35
Q

Many power operated transfer valves operate at pressures as high as _____ psi?

A

200 psi

36
Q

The most common type of seal packing material is composed of ______ impregnated with ________ or ______?

A

Rope fibers
Graphite or lead

37
Q

Packing rings are primarily used in ________ fire pumps?

A

Older

38
Q

Heat develops by friction where the packing rings come into contact with the shaft, in order to overcome this a spacer known as a ________ or _______ is supplied with the packing to provide cooling?

A

Lantern or slinger ring

39
Q

Pumps powered by gasoline or Diesel engines independently of the vehicle drive engine are examples of ___________ pumps ?

A

Auxiliary

40
Q

____ driven fire pumps are the most common to initial attack , wildland , or mobile water supply applications ?

A

PTO

41
Q

One major disadvantage of the front mount pump is the susceptibility of the pump and _________ freezing in cold weather due to their exposed position?

A

Gauges

42
Q

Valve life may be extended by ________ the pump of debris ?

A

Flushing

43
Q

The most common type of valve is the _______ valve that permits the full flow of water through a line with minimum friction loss?

A

Ball type valve

44
Q

The _________ lever usually has a flat handle that can be used to lock the valve in any positions by a 90 degree twist of the handle ?

A

Push -pull lever

45
Q

_________ valves are most commonly operated by quarter turn handles ?

A

Butterfly valves

46
Q

______ must be supplied at the lowest point on the pump and at the lowest point of each line connecting to it?

A

Drains

47
Q

Although there are several types available , the most common relief valve uses a ________- ___________ pilot valve ?

A

Spring - controlled

48
Q

A __________ is needed to create the vacuum that makes drafting possible ?

A

Priming device

49
Q

Primers fall into several categories including _____________,________, ________ and ____________?

A

Positive displacement
Exhaust
Vacuum
And air primers

50
Q

Most modern pumpers use ____________________ primers ?

A

Positive displacement

51
Q

Most new pumpers are equipped with ________ primers ?

A

Oil less

52
Q

_________ primers are generally found on skid -mounted pumps or older fire apparatus?

A

Exhaust primers

53
Q

____ primers are becoming an increasingly more popular method of priming pumps on modern fire apparatus?

A

Air primers

54
Q

Nfpa 1901 allows __________ readouts to substitute for individual pressure discharge gauges ?

A

Flowmeter

55
Q

There are several types of throttles available, including a ___________ (also called a vernier) that can be turned clockwise or counterclockwise to achieve the required pressure?

A

Throttle knob

Pumping book (20 decks)

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