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MK1 > Pumps > Flashcards

Pumps Flashcards

1
Q

___________ compressors are most widely used in the CG.

A

Reciprocating

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2
Q

Low: _________ Discharge pressure of 150 psi or less.

A

Ship’s Service Air (SSA)

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3
Q

Medium: ________ _______ Discharge pressure of 151 psi to 1000 psi.

A

Start Air (SA) or Diesel Start Air (DSA).

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4
Q

High: _____ ______ used in the Coast Guard. Discharge pressure of above 1000 psi.

A

Not commonly

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5
Q

Hydraulic _______: Used on some oil-pressurized compressors to protect the compressor in the event of a potentially damaging oil pressure drop.

A

unloaders

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6
Q

_________ drained compressor separators shall be drained once per watch, or every 4 hours, whichever comes first.

A

Manually

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7
Q

A stop valve can only be installed between the compressor and _________ if the compressor is fitted with a relief valve.

A

receiver

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8
Q

Centrifugal pumps are the most commonly found displacement type of pumps and are used to pump various fluids, where, ______ volume of flow at low pressure is required.

A

large

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9
Q

The centrifugal pump is a non-positive displacement-type pump and not _____ ______

A

Self priming

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10
Q

Centrifugal force is the force that tends to throw an object ______ from a center of rotation.

A

Outward

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11
Q

Volute: This type of casing uses a gradually widening _____ channel which changes velocity into pressure.

A

spiral

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12
Q

Diffuser: This type of casing serves the same purpose as the volute, but is ______ efficient. It directs more fluid to the outlet by the use of stationary vanes.

A

more

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13
Q

Shafts are usually made of a cold, _____ ______ or other hardened steel.

A

rolled steel

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14
Q

Mechanical seals should be replaced if the leakage rate exceeds 5 drops of fluid per minute (for newly installed seals) or _____ drops of fluid per minute for seals already in service.

A

60

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15
Q

When handling a mechanical seal, make sure you wear ______ ______

A

latex gloves.

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16
Q

There are numerous methods to removing a bearing outlined in Naval Ships Technical Manual, Chapter 244.
• Arbor press
• ________ _______

A

Bearing puller

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17
Q

The _______ should be perpendicular to the axis within .002 inches.

A

impeller

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18
Q

P6 has A _______, portable fuel tank (capacity 2.5 gallons, provides 4-6 hours of operation)

A

removable

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19
Q

P6 suction • A ______ long, 3-inch diameter suction hose with quick-disconnect fitting and screen.

A

15-foot long

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20
Q

Fill the P-6 fuel tank to a______ of 2 inches below the top.

A

maximum

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21
Q

P6 instructions are attached to the flashlight to the laminated instruction card with a ______ length of cord.

A

2-foot

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22
Q

Do not operate P-6 Pump without water for more than _________

A

2 minutes

23
Q

The P-6 Pump fuel should be filled with ____ octane or higher

A

86

24
Q

Fold the P-6 Pump’s 20-foot discharge hose into a tight, flat coil approximately 10 ______ _____. The coupling needs to hang free from the end of the flat coil approximately 8 inches.

A

inches long

25
Q

_____ _____ of the P-6 Pump should be 1400 RPM and full throttle speed should be 3900 RPM.

A

Idle speed

26
Q

P-6 spark plug gap is adjusted to ___ thousandths.

A

30

27
Q

The P-100 _____ _____ ______ is a Bosch type timed at 13 plus or minus 1 degree top dead center.

A

fuel injection pump

28
Q

The P-100 pump is a _____ ______, single-stage, centrifugal pump complete with a compound pressure gauge, drain valve, and primer connection.

A

single-suction

29
Q

The P-100 pump has a 3-inch _____ _______ connection for the suction, and a 21⁄2-inch male- threaded connection for the discharge.

A

male-threaded

30
Q

The P-100 comes with _____ rubber, 10 feet in length, 3-inch diameter NH threads sections of hose. Typically three hoses per pump assembly.

A

Hard

31
Q

The P-100 has an _______ _______ jacketed 10 feet in length and 2 1⁄2 inches in diameter with clamped, flanged couplings.

A

Insulated synthetic

32
Q

The two styles of _____ _____ used in the Coast Guard are the Elkhart and Akron. Both are available in 11⁄2-inch and 21⁄2-inch sizes.

A

vari-nozzles

33
Q

There are two types of eductors used in the Coast Guard. They are the ______ type and the Peri-jet.

A

Navy “S”

34
Q

Refueling a running P-100 pump in an ________ _______ only. A second person will stand by with a fire extinguisher during this evolution.

A

emergency situation

35
Q

Check the engine and pump for freedom of movement and prime the engine with ________ ______ by slowly pulling on the recoil starter three times while pressing the decompression lever each time prior to starting the P-100 pump.

A

lubricating oil

36
Q

The primer line shut-off valve should be _______ just prior to starting the P-100 pump.

A

opened

37
Q

Once the P-100 pump has started, the ______ valve should be shifted to the prime position blocking the main exhaust opening.

A

exhaust

38
Q

The P-100 pump be flushed with _____ _____ after shutdown a minimum of 10 minutes.

A

fresh water

39
Q

Tighten the P-100 packing screw using a 6-inch long, 9/16-inch end wrench until drip rate is between ____ __ ____drops per minute – do not over-torque (24 in-lb torque).

A

5 and 60

40
Q

The following ______ _____ are coupled with air compressors: Diesel engine, Gas engines and Electric Motors.

A

prime movers

41
Q

Three types of _____ __________are centrifugal, rotary and reciprocating.

A

air-compressors

42
Q

151 to 1000 psi is the ________ _______ pressure for start air or diesel start air.

A

normal operating

43
Q

In ____ ______ compressors the compression cycle is completed in 1 revolution of the crankshaft.

A

two stage

44
Q

Strip and Disc are the two most common types of _____ used in air compressors.

A

Valves

45
Q

To reduce the risk of _______ the rapid operation of manual valves should be avoided.

A

explosion

46
Q

The normal duration of a blow-down on an air-compressor is 10 to 20 _______.

A

seconds

47
Q

The shutoff head is the_______ pressure that a pump can produce.

A

maximum

48
Q

The two classifications of centrifugal pumps are _____ _____ and multi-stage.

A

single-stage

49
Q

Touching the mated surfaces of a mechanical seal may cause _____ face failure.

A

Carbon

50
Q

Line, radial, and ______ bearings give radial positioning to the rotor.

A

Shaft

51
Q

An elastomer or “spider” helps _____ starts decrease.

A

Hard

52
Q

A measurement _________ 0.002 inches would indicate excessive radial run-out.

A

exceeding

53
Q

_____ alignment readings must be taken within 30 minutes of shutting down machinery.

A

Hot

MK1 (11 decks)

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