Welcome to your MEO Class 4 - Electrical Test 3
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1
Which of the listed devices is used to measure pressure and convert it to an electrical signal?
2
A lead-acid battery is considered fully charged when the
3
The open circuit voltage of a fully charged lead-acid battery cell is
4
High vacuum diodes, gas-filled diodes, and germanium semiconductor diodes may all be used as
5
The full torque electric brake on an electric cargo winch functions to
6
The seven segment arrangement for numerical display on consoles, test meters and other applications can be either ________________.
7
In an AC generator, direct current from a separate source is passed through the windings of the rotor
8
A tubular fuse should always be removed from a fuse panel with
9
Incandescent lamps are classified according to
10
The method used to produce electron emission in most vacuum tubes is known as
11
A silicon controlled rectifier (SCR) is a solid state device used to change ________________.
12
Which of the listed conditions is an advantage of a PN diode over a vacuum diode?
13
Power transformers are rated in
14
A magnetic blowout coil in a DC motor controller contractor functions to
15
A semiconductor that decreases resistance with an increase in temperature is known as a
16
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?
17
Voltage generator by most AC generators is fed from the machine to the bus by means of
18
In the event of a power failure during cargo loading operations, the movement of an electric powered cargo winch will be stopped by
19
Electrical leads and insulation on a motor should be painted with
20
The insulation resistance of electric equipment and machinery should be tested for the lowest normal insulation values
21
A fuse of recommended current and voltage ratings that blows often should be replaced only with a fuse of
22
The number of cells in a 12-volt lead-acid battery is
23
One factor that determines the frequency of an alternator is the
24
A direct current passing through a wire coiled around a soft iron core is the description of a simple
25
A delayed-action fuse is most frequently used in which of the listed circuits?
26
When choosing a battery for a particular application, major consideration should be given to the battery's
27
Which of the following statements concerning an analog device and a digital device is correct?
28
Alternative current circuits develop resistance, inductance and capacitance. The inductance of a coil is expressed in
29
Which of the following conditions will occur if the solenoid coil burns out on a cargo winch with an electrical brake?
30
The purpose of DC generator brushes is to
31
Which of the following statements represents the main difference between a relay and a contactor?
32
Grounds occurring in electrical machinery as a result of insulation failure are usually caused by
33
An electrical device which employs a stationary armature and a rotating electromagnetic field is used aboard ship as a
34
A circuit breaker differs from a fuse in that a circuit breaker
35
The load sharing characteristics of two diesel generators operating in parallel are mostly dependent on their governor
36
The output voltage of a 440 volt, 60 hertz, AC generator is controlled by the
37
The use of four diodes, in a full-wave bridge rectifier circuit, will
38
The state of charge of a lead acid storage battery is best indicated by the
39
The device that most commonly utilizes the principle of electromagnetic induction is the
40
The first requirement for logical troubleshooting of any system is the ability to
41
Which of the motors for the devices listed below is fitted with an instantaneous overload relay?
42
As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to
43
Which of the damages listed can occur to the components of a winch master control switch, if the cover gasket becomes deteriorated?
44
Which of the listed precautions should be taken when cleaning the internals of a motor with compressed air?
45
The amount of voltage induced in the windings of an AC generator depends on
46
The apparent power in a purely inductive circuit is also known as
47
To repair a small electrical motor that has been submerged in saltwater, you should
48
The basic measuring unit of inductance is the
49
Which of the listed procedures should be carried out to prevent moisture damage to electrical apparatus during extended periods of idleness?
