Electrical Auxiliaries

Question 1

The washer extractor should always be loaded to capacity before operating for what reason?

Answer 1

Lighter loads may fail to distribute clothes properly

Question 2

When is the automatic injection system used?

Answer 2

During formula mode

Question 3

What means is used to operate the brake and clutch assemblies

Answer 3

Ships service compressed air

Question 4

What is the normal day weight load capacity of the washer extractor

Answer 4

60lbs

Question 5

What is the most frequent trouble with electric cooking equipment in the galley

Answer 5

Burnt contacts

Question 6

What is the heating range of the electric griddle

Answer 6

200-450 degrees F

Question 7

What is the most common type of convection oven used aboard ships

Answer 7

M-series

Question 8

What galley electric ranges are used

Answer 8

Type A, 36 inches
Type B, 20inches
Type C, 30inches

Question 9

What does the rudder angle order system do?

Answer 9

Provides a nonverbal means of communicating rudder commands from the pilot house to the steering gear room

Question 10

What does helm wheel angle indicator do?

Answer 10

Provides a mechanical indication of the rudder command position

Question 11

What does the portable steering control unit do?

Answer 11

Provides the option of steering from either bridge wing

Question 12

What does the rudder angle display system do?

Answer 12

Provides rudder position information to operators

Question 13

What is the most common cause of failure in any hydraulic system

Answer 13

Dirty oil

Question 14

Which means can be used to control the operation of the steering gear

Answer 14

Hand electric, autopilot, emergency control

Question 15

The rudders have a max working angle of what number of degrees (a) left and (b) right from the middle ship position

Answer 15

35 and 35

Question 16

Where is the ships control console located

Answer 16

The pilot house

Question 17

In a forklift, thermal switches serve to protect the drive and steer motor circuits by opening of what minimum motor frame temperature is reached?

Answer 17

225 degrees F

Question 18

What is the advantage of using solid-state control circuiting integrated with magnetically operated devices to regulate the speed of the series driven motor in an electric forklift?

Answer 18

Allows longer battery-powered operation before recharging is needed

Question 19

Which of the following are components of the steer motor power circuit in an electric forklift

Answer 19

The steering motor and contacts of the steering relay coil (s)

Question 20

Which components are the receiving unit of the receiving ship

Answer 20

A king post, receiving head, an elevator, a carriage return unit, and a remote control console

Question 21

What is the purpose of the ram tensioner

Answer 21

To help the high line winch operator keep the high line tight during unrep operations

Question 22

What are the two major units of the unrep system

Answer 22

Sending and receiving

Question 23

Which of the following is the purpose of the sensing heads mounted up and down the elevator trunk?

Answer 23

To slow and stop the elevator, to prevent the elevator from over speeding, to prevent over travel

Question 24

What advantage, if any, is gained by using a dc motor as the pilot motor

Answer 24

The dc motor makes an infinite number of platform speeds available, which range from 3 to 90ft per minute

Question 25

The functions performed in electric elevators by limit switches, relays, and contractors, are performed in electronically controlled elevators by what component?

Answer 25

The static logic panel

Question 26

If an elevator platform over-travels in the down direction which devices help to prevent damage to the platform and the hull?

Answer 26

Spring bumpers

Question 27

Elevators are prevented from being operated from more than one location by the installation of what components?

Answer 27

Interlocked push button stations

Question 28

In electro hydraulic elevators speed changes are accomplished by what means

Answer 28

Varying the stroke of the hydraulic pump

Question 29

Purpose of the slack cable switch

Answer 29

Prevents elevator operation if the cables become loose

Question 30

Purpose of motor overloads

Answer 30

Stops the motor to protect it from an overcurrent condition.

Question 31

What elevator component slows the elevator once it reaches the desired level

Answer 31

A cam-operated limit switch switches the motor to a lower speed just before the desired level

Question 32

The capstan is designed to heave (a) what line at (b) what speed?

Answer 32

A. 6 inch | B. 50ft per minute

Question 33

If the power fails when the anchor and chain are being lowered, the electric brake is designed to hold what percentage of the rated load

Answer 33

150%

Question 34

What is the purpose of the controlled torque coupling

Answer 34

To prevent excessive stresses when the anchor is being housed

Question 35

The magnetic brakes of the electric anchor windlass provide what safety feature?

Answer 35

Hold the load of power fails

Question 36

By what means are shaft hp readings displayed in remote areas of the ship

Answer 36

Repeaters and remote displays

Question 37

What is the purpose of the shaft torsionometer system

Answer 37

To measure the torque in the propulsion shaft

Question 38

What safety feature is incorporated into a precipitator to prevent electrical shock to the operator

Answer 38

The access cover safety switch

Question 39

What priniciple is the basis for operation of the vent fog precipitator?

Answer 39

Electrostatic precipitation

Question 40

What principle permits the ultrasonic cleaner to operate with very little loss of strength

Answer 40

The frequency of sound waves

Question 41

The tank of the ultrasonic cleaner has what total number of sections

Answer 41

2

Question 42

What feature de-ices the window served by the wiper

Answer 42

A 36W heating element in the wiper arm

Question 43

What are the three major components of a window wiper

Answer 43

Control box, drive unit, wiper arm

Question 44

What voltage is used to operate the wiper motor?

Answer 44

115 VAC

Question 45

The oil pressure safety switch is designed to secure the refrigeration compressor of the oil pressure drops to what minimum value

Answer 45

12 PSI

Question 46

On a refrigeration system, timing relays provide what safety feature

Answer 46

Secure the refrigeration after 10 seconds if no oil pressure develops

Question 47

What is the purpose of the elapsed time meter

Answer 47

To keep track of the time a compressor is operated

Question 48

What compressor component operates to drain the dehydrator condensate sump

Answer 48

Solenoid valve SV7

Question 49

When operating in the automatic 125 setting, the compressor is set to (a) start and (b) stop at what pressure

Answer 49

110 psig falling | 125 psig rising

Question 50

What compressor component operates to allow the flow of the injection water

Answer 50

Servo valve SV1

Question 51

On an air compressor, what condition is indicated by the enable running light

Answer 51

The compressor is in an operative condition

Question 52

The low pressure air compressor has what total number of modes of operation

Answer 52

2 auto (low and high) and one manual

Question 53

What is the ratio of the speed of the starting motor to that of the engine

Answer 53

15 to 1

Question 54

What action should you take to prevent a small boat motor from overheating

Answer 54

Operate the starting motor for 30 second periods at 2 minute intervals

Question 55

You have spilled battery acid on your arm what is the first step you should take

Answer 55

Wash the area thoroughly with fresh water

Question 56

Which of the following battery conditions may be caused by a high charging rate

Answer 56

Excessive gassing

Question 57

An equalizing charge on a Battery is continued for four hours until which of the following conditions is met

Answer 57

The specific gravity of all cells shows no Change

Question 58

If you want to know the rating of a lead-acid storage battery, you would normally use what hourly discharge rate?

Answer 58

10 hour rate

Question 59

What method should you use to mix electrolyte

Answer 59

Always pour acid into water

Question 60

What is the corrected specific gravity reading for a battery whose electrolyte temp is 74 degrees F and has an Un-corrected reading of 1.220?

Answer 60

1218

Question 61

What is the corrected specific gravity reading for a battery whose electrolyte temp is 89 degrees F and has an in corrected reading of 1.212?

Answer 61

1215

Question 62

ON a small boat, what is the adjusted specific gravity of a fully charged battery

Answer 62

1.210 to 1.220

Question 63

The specific gravity of a battery electrolyte is the ratio of what electrolyte component

Answer 63

The weight of a specific volume of acid to the weight of the same volume of water

Question 64

Freeze storerooms and chill storerooms are maintained at what temp respectively

Answer 64

0 degrees and 33 degrees F

Question 65

What component acts to delay compressor shutdown for 10 minutes once a discharge pressure Of 125 psig is reached

Answer 65

Pressure switch PSI