USCG EM1 SWE PREP

USA Coast Guard service wide exam prep

The currents in the FI and QI degaussing coils must be changed when?

there are changes in the ships heading, magnetic latitude, or both.

When megging a degaussing coil for grounds you must always?

open the supply switch and tag the reversing switch.

The ship's gyro system provides the automatic degaussing system with what?

a synchro signal.

What does the degaussing system signal amplifier circuit send to the relay amplifier?

sends the relay amplifier a dc output signal.

Degaussing coil insulation resistance should be measured by?

should be measured IAW navships tech manual.

What is Deperming?

essentially a large version of demagnetizing a watch.

When a ship is said to be ranged when its magnetic field is measured at a magnetic range, is known as?

known as degaussing station.

What is Degaussing?

minimizes the possibility of detection by magnetic mines.

Control of coil currents is accomplished ______ in older degaussing installations and ________ in new ones.

manually, automatically

Degaussing installations with rheostat control are supplied by what?

by a constant dc generator.

Degaussing equipment should be operated when?

weekly for four hours.

When megging a degaussing switchboard you should?

open the main breaker and close the reversing switch

There are ________ alarms on the degaussing panel.

visual

Shipboard winches are normally designed to withstand a static load of what?

200% of rated load without distortion.

Electric brakes used on shipboard winches shall demonstrate the ability to stop and hold _____ of rated load when lowering at rated speed and _______ static pull of rated load without creepage.

150%, 200%

A drum winch has ____ to ____ horizontal drums

1 to 4

A _____ _______capstan control provides a plurality of speeds.

direct current

Shipboard winches are designed to do what?

to haul in and pay out at a rated load at a rated speed

An AC capstan control provides?

full and half speed. It also provides 2 forward and 2 reverse controls.

What are two general types of winches?

the gypsy and the drum.

Damage by ______ is one of the major causes of component casualties on deck machinery.

water

Always consult the ______ ______ when making adjustments and repairs.

Technical manual

Galley equipment is normally designed for operation on what?

115-volt or 230 volt dc power or 440 volt 3 phase 60 hz ac power.

On galley ovens, each heating unit is controlled by?

by individual 3 heat switches.

Electric deep fat fryer are normally provided in the ratings of ?

ratings of 5kw, 10kw, and 18kw.

The heating units are?

immersed directly in the fat to ensure maximum efficiency.

The adjustable range is ____ - ____ deg. F.

250-400

In the event the fat temp reaches _____ deg F the thermostat contact will close, thus tripping the breaker and de-energizing the fryer.

460

Before starting work on the electric galley equipment be certain that ______ _______

power secured

The largest single trouble with electric ranges, ovens and deep fat fryers is _______ _________

burning contacts

Laundry equipment aboard ship is comprised of _______, _________, and ________ separately or in combinations.

washers, extractors, and dryers

The cylinder of the washer-extractor has a ______ dry weight capacity.

100 lbs

The _____ ______is the safety feature that protects the washing machine in case of excessive vibrations.

mercury switch

Type ___ electric ranges are provided with three 6.0 KW surface units.

A

The ____________ installed on later model deep fat fryers will operate in the even of a main thermostat failure.

upper limit thermostat

_______ _______ and _______ is controlled by three pressure operated level switches

Water lever and temperature

Lighter loads may fail to distribute clothes properly, causing the machine to _____ ______

Vibrate excessively

The ____ _____ ______ prevents the machine from starting when the door is open.

tub door interlock

______ ______ are recommended.

Full loads

Tumble dryers should completely dry a load in approximately ____ minutes

20

The proper polarity must be observed when applying what?

applying/adjusting coil currents in the degaussing systems.

An automatic degaussing system takes signals from the gyro system and converts into what?

into signals proportional to the magnetic heading.

When megging degaussing coils that have rectifiers for power supplies you must always?

always disconnect the rectifiers.

The primary power supplied to the shipboard laundry equipment is ______

440 volt 3 phase

The automatic operation of a washer-extractor is controlled by a?

a drum controller or programmer.

Warning signs should be attached to shore tie cables at intervals to indicate ______

voltage

A magnetic pickup that does not meet the listed resistance requirements and is determined faulty should be?

should be replaced.

Governor faults are usually revealed in what?

usually revealed in turbine/prime mover speed variations

Apply a coat of ___ _____ ______ to the crotch of the cable and allow it to dry when assembling

air drying varnish

Always support portable cables above _____, _____ _____ and _______

decks, floor plates and gratings.

_______ _______ ______ may be spliced.

Shore power cable

When replacing a resistor always?

replace it with a resistor of the same of higher wattage rating

Troubleshooting is the art of _______ ________.

locating problems.

The first step in troubleshooting a problem is to?

recognize normal conditions/operations.

Protective devices are used to protect what?

protect life and equipment.

The simplest protective device is?

is a fuse.

The most important characteristic of a fuse is its?

is its current versus time or blowing ability.

Never use a _______ as a voltage tester.

pigtail

Circuit breakers in common use come ratings ranging from?

from 10 to 600 amps.

The purpose of _______ _______ is to isolate the faulty section of the system and at the same time to maintain power on as much of the system as possible.

selective tripping

Circuit breakers require careful inspection and cleaning to be done?

inspection and cleaning annually.

A special inspection should be carefully made of each pair of contacts after what?

a circuit breaker has opened on a heavy short circuit

The magnetic pickup is used to detect the speed of what?

detect the speed of the prime mover.

what will not excite the magnetic pickup?

Non-magnetic materials, such as aluminum, brass, and some stainless steels

Magnetic pickup voltage decreases as the air gap is _______.

increased

Resistance measurements of electrical equipment are recorded on __________.

NAVSHIP FORM 531.

The unit of resistivity in ohms per circular mil foot

RHO

Nor more than ____ row of cables should be installed on a single cable hanger.

one

Specs require _____ grounding conductor be used in cables for all new portable tools and equipment.

green

Motors and generators used on propulsion plants are usually insulated with what?

with class B insulating material.

What test is the best test to determine the water tightness of stuffing tubes?

air test

_______ _______ ________ would be the most probably cause of a DC generator's output having a reversed polarity.

Reversed residual magnetism

Roughness of fingers and contacts of a drum controller shall be smoothed with a

File and sandpaper

A circuit breaker relay magnet that chatters most likely is caused by

rusty sealing surface

The most common cause of controller contacts welding is

low voltage

To clean the platinum surface of salinity cell electrodes, use

alcohol

Micro is the prefix for

Millionth

The cable designed for use as leads to portable electric equipment is?

Repeating flexing service cable

On a switchboard, a red indicator lamp is used to indicate a portion of the system is?

inoperative

______ are never places where explosive vapors are present.

Lamps

A series field placed in some DC propulsion generators is for?

Starting with batteries

________ _________procedures are prescribed in COMDTINST M3501.30

CASREP/CASCOR

Required pms reports are included in a section of the?

Cutter engineering report

A machinery history will be kept by all cutters equipped with machinery and are ______ in length or more.

65 feet

_____ is the form used to provide input, request assistance and serve as a feedback tool.

CSMP

The mastercross reference list, afloat shopping guide, GSA catalog and management list are ______ _______ for units that submit requisitions.

Required catalogs

_______ ________can be used to submit a follow up, modification or cancellation of a surf requisition.

Surf Card

____________________ is used to record and update surf requisition status

surf requisition log (CG4940)

An _______ is used for the purchase of supplies or services not in the excess of the small purchase limit.

OF-347

A _______ is used for initial surf requisition and forwarded to the requisition processing poin

SF-344

The prescribed maintenance for engineering files is contained in ____________

COMDINST M9000.6

Personal property accounting is outlined in____________

COMDINST M4400.13

Tech pubs that are found outdated or incorrect shall be reported to the _______ __________

Appropriate agency

The height of a kickpipe including the stuffing tube is?

9" minimum and 18 max.

The distance between cable supports should not exceed.

32”

Electric brakes on winches are __________ set and _________ released.

mechanically, electrically

______ _______ on winches are mechanically set and electrically released.

Electric brakes

_______ ______are rated by voltage and kw load.

Photo Cells

_______ must trip at 6mA or below.

GFCI

Most relay contact trouble is due to build-up of film caused by?

grease