Competency 7 part 2

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Electrical Competency Quiz: Test Your Knowledge

Welcome to the Electrical Competency Quiz! This quiz is designed to assess your knowledge and expertise in various electrical concepts and practices. With 28 multiple-choice questions, you will have the opportunity to showcase your understanding of electrical systems, motor protection, and safety protocols.

Each question is carefully crafted to ensure a comprehensive evaluation of your skills. Get ready to challenge yourself!

28 multiple-choice questions
Focus on electrical systems and safety
Instant feedback on your answers

28 Questions7 MinutesCreated by WiringWizard321

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

Tapered, long blade gage

Inside micrometer

Dial indicator

Cloth (non-metallic) tape measure

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

Thermocouple

Strain gage

Proximity

Load cell

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

Dark or dim switchboard ground detecting light

Bright switchboard ground detecting light

Low switchboard watt meter

High switchboard watt meter

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

Clamp-on voltmeter

500 volt megohmmeter

Standard digital multimeter

Portable high current testing unit

When ship board electrical distribution circuit are connected in parallel, additional parallel circuits will cause the total circuit resistance to _________.

Increase, causing a decrease in the line voltage

Decrease, causing an increase in the line current

Decrease, causing an increase in the line voltage

Increase, causing a decrease in the line voltage

107. What is a device that converts fluid powers into linear mechanical force and motion that consists of a movable piston, connecting rod, and plunger operating in a cylindrical cavity?

Diaphragm

Actuator

Piston

Cylinder

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

It must be stowed upright on its shaft

It must be supported by two “V” notched wood blocks

It must be returned to the frame as soon as the bearings are removed

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

The motor will overspeed and burn up

The brake will be set by spring force

The load suspended from the cargo boom will fall

Nothing will happen; the winch will continue to operate as usual

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

Systematic rotation of circuit cards with those from spares to allow component cooling

Daily inspection of console foundation bolts

Periodic changing or cleaning of console ventilation and control room air conditioning filters.

All of the above

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?

Reference cell voltages should be maintained at half at the normal range for approximately 48 hours

The unit should remain off for the specified amount of time so as not to disturb curing

A slight (10-15%) over current to the anodes should be allowed in order to speed drying

Output currents should be carefully monitored to assure operation at nearly 100% capacity for proper curing

The air gap provided an induction motor should be checked periodically with a feller gauge to detect_____.

Increase in apparent power factor

An increase in hysteresis loss

Any increase in rotor bearing wear

Any decrease in motor

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

Hydrometer

Multi tester

Pyrometer

Multi meter

How can you restore the charge of a lead-acid battery?

Passing an alternating electric current through the cell

By adding water to the electrolyte

Passing a direct electric current through the cell

Adding acid to the electrolyte

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

Fuse

Circuit breaker

Diode

Rheostat

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

Contamination of lube oil

Sparking at the winch motor brushes

Overheating of the winch motor

Rapid corrosion of switch components

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

Reactor starters

Across-the-line starters

Autotransformer starters

Resistor starters

In an impressed current cathodic protection system, what is anode?

Insulated from the hull and does not waste away

Insulated from the hull but deteriorates with time

Connected to the hull but does not waste away

Connected to the hull and deteriorates with time

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

Preheat the insulation to assist in cleaning

Disconnect the motor from the power source

Slow the motor down to low speed

Secure all ventilation in the are

In using the Rheostat, what do you call the circuit of the motor to adjust the speed?

Induction motor with wound-rotor

Induction motor with squirrel gauge

Breaking motor with generator capability

Motor of synchronous type

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

Short the test leads and calibrate the instrument to zero

Hook the jaws of the instrument around the insulated conductor

Connect the voltage test leads to the appropriate terminals

De-energize the circuit to allow connection of the instrument in series

The purpose of a motor under voltage protection device is to___.

Protect personnel from low voltage shock

Prevent high armature current when power is restored

Trip the load off the motor in case of fire

Start the motor at a very low voltage

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?

Transducer

Controller

Web framed sensor

Transmitter

The purpose of a main switchboard circuit breaker’s reverse-power trip is to______.

Protect the circuit breaker blow out coil

Prevent alternator motorization

Prevent low voltage trip out

Prevent air circuit overload

Competency 7 part 2

Electrical Competency Quiz: Test Your Knowledge

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