Welcome to your MEO Class 4 - Electrical Test 3
Click NEXT to start your Test
1
Which of the listed procedures should be carried out to prevent moisture damage to electrical apparatus during extended periods of idleness?
2
Which of the motors for the devices listed below is fitted with an instantaneous overload relay?
3
High vacuum diodes, gas-filled diodes, and germanium semiconductor diodes may all be used as
4
The apparent power in a purely inductive circuit is also known as
5
The insulation resistance of electric equipment and machinery should be tested for the lowest normal insulation values
6
The open circuit voltage of a fully charged lead-acid battery cell is
7
Which of the damages listed can occur to the components of a winch master control switch, if the cover gasket becomes deteriorated?
8
A magnetic blowout coil in a DC motor controller contractor functions to
9
In the event of a power failure during cargo loading operations, the movement of an electric powered cargo winch will be stopped by
10
A circuit breaker differs from a fuse in that a circuit breaker
11
An electrical device which employs a stationary armature and a rotating electromagnetic field is used aboard ship as a
12
A delayed-action fuse is most frequently used in which of the listed circuits?
13
A silicon controlled rectifier (SCR) is a solid state device used to change ________________.
14
Alternative current circuits develop resistance, inductance and capacitance. The inductance of a coil is expressed in
15
The full torque electric brake on an electric cargo winch functions to
16
Which of the following conditions will occur if the solenoid coil burns out on a cargo winch with an electrical brake?
17
Electrical leads and insulation on a motor should be painted with
18
Which of the listed devices is used to measure pressure and convert it to an electrical signal?
19
In an AC generator, direct current from a separate source is passed through the windings of the rotor
20
Which of the following statements concerning an analog device and a digital device is correct?
21
The number of cells in a 12-volt lead-acid battery is
22
One factor that determines the frequency of an alternator is the
23
The load sharing characteristics of two diesel generators operating in parallel are mostly dependent on their governor
24
A semiconductor that decreases resistance with an increase in temperature is known as a
25
The device that most commonly utilizes the principle of electromagnetic induction is the
26
As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to
27
Voltage generator by most AC generators is fed from the machine to the bus by means of
28
A tubular fuse should always be removed from a fuse panel with
29
The basic measuring unit of inductance is the
30
The purpose of DC generator brushes is to
31
Grounds occurring in electrical machinery as a result of insulation failure are usually caused by
32
The output voltage of a 440 volt, 60 hertz, AC generator is controlled by the
33
The seven segment arrangement for numerical display on consoles, test meters and other applications can be either ________________.
34
Incandescent lamps are classified according to
35
A direct current passing through a wire coiled around a soft iron core is the description of a simple
36
The use of four diodes, in a full-wave bridge rectifier circuit, will
37
Which of the listed battery charging circuits is used to maintain a wet cell, lead-acid, storage battery in a fully charged state during long periods of disuse?
38
A fuse of recommended current and voltage ratings that blows often should be replaced only with a fuse of
40
Which of the listed precautions should be taken when cleaning the internals of a motor with compressed air?
41
To repair a small electrical motor that has been submerged in saltwater, you should
42
When choosing a battery for a particular application, major consideration should be given to the battery's
43
The state of charge of a lead acid storage battery is best indicated by the
44
A lead-acid battery is considered fully charged when the
45
Power transformers are rated in
46
The amount of voltage induced in the windings of an AC generator depends on
47
The first requirement for logical troubleshooting of any system is the ability to
48
Which of the listed conditions is an advantage of a PN diode over a vacuum diode?
49
The method used to produce electron emission in most vacuum tubes is known as
50
Which of the following statements represents the main difference between a relay and a contactor?
