A common type of protective covering used on electric conductors is _____

Any electric motor can be constructed to be?

The electrolyte in a lead-acid storage battery consists of distilled water and ?

What is used in most for starting three-phase induction motors of five (5) horsepower less?

The air gap provided in induction motors should be checked periodically with a feeler gage to detect an unequal air gap and ______.

You are testing the insulation in an AC generator with with a megohmeter. the resistance value of a dry, clean winding will ______.

The insulation resistance of electric equipment and machinery should be tested for lowest normal insulation valves _____.

A temperature instrumentationsystem for an engine room console consistes of a resistance temperature detector(RTD), a measuring bridge circuit, and a meter(or alarm circuit). Which of the following statements is true concerning the measuring bridge circuit?

What should be done to protect the rotor of a motor disassembled for maintenance of overhaul?

A reversible electric motor with worm gear that is connected to the flywheel to position engine parts is the _____ .

What gives the information about the speed of a motor in D. C. Generator,?

A self-excited DC generator fails to come up to its normal 440 volts. What could be the probable cause?

Which of the listed procedures should be carried out to prevent moisture damage to electrical apparatus during extended periods of idleness?

What do do you call on a periodic testing by a shore side support technician using a special camera which can detect potentially dangerous loose or corroded bus bar and controller connections?

What is a variable resistance component used as a control device in electrical circuit?

What would indicate ground in a particular phase 3 - phase low voltage distribution system?

Electrical Insulating rubber gloves should be dielectrically tested every how many months?

The greatest single cause of electrical failure is ____.

With both ends of a three conductor cable disconnected and arranged without the conductors touching each other, an ohmmeter reading of 'zero' ohms between the ends of one conductor would indicate ______.

Which test on a transformer provides information about the regulation, efficiency and heating under load condition?

Temporary repairs to an open DC propulsion armature coil can be made by _______

A temperature instrumentation system for an accomodation reefer room consists of a resistance temperature detector(RTD), a measuring bridge circuit, and a meter or alarm circuit. Which of the following statements is true concerning the measuring bridge circuit?

Regulations require each motor controller to have a wiring diagram located ______.

A switchboard for an AC electrical system requires the use of which of the following devices?

What motor is fitted with an instantaneous overload relay?

What precaution should be taken with a vessel's impressed current cathodic protection system after a drydocking period during which the hull has been painted?

A common type of protective covering used on electrical conductors is

What is a three-layer bidirectional device used primarily as a trggering device with junctions heavily and equally doped?

Encrusted dirt accumulated inside a motor should be removed with a ______

A device which can be used to check the calibration of a circuit breaker is a

Air gap readings should be periodically taken for electrical generation equipment. The best tool to use to take these measurements is a ______.

How should controller contacts be routinely cleaned?

What is the result if the solenoid coil burns on a cargo winch with an electrical brake?

Moisture as a result of condensation occurring inside of the cargo winch master switches, can be reduced by?

When the equivalent circuit diagram of double squirrel-cage induction motor is constructed the two cages can be considered _____.

It is a type of temperature sensor that has the characteristic of being very accurate, linear and has a good long term stability.

What should you use to determine if a stator coil is grounded?

What kind of device that has two pieces of metal joined together so that when its junction is heated, a voltage is produced?

The schematic symbol for an operational amplifier in an analogue circuit is a _____.

What will you do if the generator is exposed to rain or any water?

When reading electrical motor controller diagrams, it helps to know that ______.

To check the three line fuses of three-phase system consisting of a three-phase motor, must _______.

Where a thermal-acting breaker is required to be used in an area of unusually high, low, or constantly fluctuating temperatures, an ambient compensating element must be used. What does this element consist of?

Which of the following physical characteristics does a wound-rotor induction motor possess that a squirrel-cage motor does not?

Which of the following statements concerning the maintenance of solid silver Contacts in relay and auxiliary control circuits is correct?

Which of the listed precautions should be observed before spraying liquid solvent on the insulation of an electric motor?

A fuse the blows often should be replaced only with a fuse of ______.

When a nickel-cadmium battery begins gassing while connected to the battery charging circuit, you should _____.

The windings of electric generators during short idle periods should be _____.

What maximum voltage can Class 00 electrical insulating rubber gloves can be used?

What may happen to the components of a winch master control switch, if the cover gasket becomes deteriorated?

Which of the following safest precautionary measure is to be done prior working on the motor of the cargo winch?

How will you remove a tubular fuse from a fuse panel with ?.

The air gap provided an induction motor should be checked periodically with a feeler gage to detect _____.

A safety device in an electrical circuit consisting of metal strip that melts when the current exceeds the safe level is called ____.

A molded-case breaker provides protection against short circuits by using?

The purpose of a main switchboard circuit breaker's reverse-power trip is to _____.

Air gap readings should be periodically taken for electrical generation equipment. The best tool to use to take these measurement is a ____.

The purpose of a motor under voltage protection device is to _____.

The power scale of circle diagram of an induction motor can be found from _____.

In the event of a power failure during cargo loading operations, which of the following can stop the movement of an electric powered cargo winch?

An electric tachometer receives the engine speed signal from?

periodic testing of circuit breakersis necessary to assure that a correct rated and properly installed unit ____.

Before working on an electric motor starter panel located on the main deck, what should you do FIRST?

The proper way to apply plastic electrical tape to an electric cable splice is to _____.

If a small electric motor is immersed in salt water it should be _____. I. washed in fresh water II. dried in an oven III. blow air until it dries

If a small electric motor is immersed in salt water it should be _____. I. washed in fresh water II. dried in an oven III. blow air until it dries

A temperature instrumentation system for an engine room console consistes of a resistance temperature detector(RTD), a measuring bridge circuit, and a meter(or alarm circuit). Which of the following statements is true concerning the measuring bridge circuit?

When trouble shooting electronic equipment, what is the first step to be taken before testing the circuit voltage?

What kind of electrical cable that is widely used and is highly resistant to mechanical damage?

What is a device that changes an input signal of one type into an output signal of a different type that is proportional to the original input?

If a delicate component must be soldered into a circuit the component may be protected from the heat of the soldering process by _____.

The removal of paint from electrical equipment such as generators, should be cautiously undertaken because _____.

Which of the following materials is recommended for finishing the slip rings after grinding or turning?

When changing tubular fuses always use a _____.

The division of kilowatt load between two paralleled alternators is determined by the ?.

A device which can be used to check the calibration of a circuit breaker is a _____.

What devices is fitted to prevent the generator windings from absorbing moisture while at standstill?

To carry out an insulation resistance test, one terminal of the megohmmeter should be connected to the winding, with the other terminal being connected to the _____.

During maintenance of circuit breakers, _____.

Which of the following statements concerning analog and digital devices are correct?

When removing ball or roller bearings from the shaft of a motor, you should use a _____.

The charging of lead-acid storage batteries will always result in ?

What electrical apparatus can test insulating efficiency in an electric installation?

What is the first step to properly use a hook-on-type volt/ammeter in checking current flow?

What kind of instrument used to measure the specific gravity, or "charge" of the electrolyte of a storage battery?

Electrically operated safety devices on auxiliary diesel engines functions to stop the engine by ____.

When a lead-acid battery begins gassing freely while receiving a normal charge, what should you do when charging?

When a megohmmeter is being used to test insulation resistance, current leakage along the surface of the insulation is indicated by the megohmmeter's pointer?

A capacitor can be tested using a megohmmeter or an ohmmeter, if the meter is connected to a shorted capacitor, the meter pointer should ______.

Which of the following data is required to draw the circle diagram for an induction motor?

A molded-case breaker provides protection against short circuits by using?

Two contributors of electronic console failures are heat and vibration. To combine some of their effect, preventive maintenance procedures should include ____.

Which of the following statements is true concerning the cleaning of electrical contacts?

Periodic testing of circuit breakers is necessary to assure that a correct rated and properly installed unit ____.

Which of the following statements best describes the material known as varnished cambric?

When a replacing a fuse with one of a higher rating than the original, which of the following is true?

A current at which a magnetic-type overload relay tends to trip maybe decreased by raising the plunger further into the magnetic circuit of the relay. This action will ____.

What does the variable resistance placed in the rotor circuit of a wound-rotor induction motor provide?

The automatic voltage regulators provide on switch boards has function to _____.