問題一覧
1
When troubleshooting an electronic circuit, a cold solder joint can be located with the aid of an ohmmeter. Once the problem has been located, you should______
reheat connection with a soldering tool and recheck with an ohmmeter
2
Four lamps are connected in parallel in a single circuit. If one of the lamp burns out, the others will _____.
burn with their original intensities
3
Which of the following problems is indicated if lead‐acid battery begins to gas violently when it is first placed on charge?
An excessive charging rate is being applied to the battery
4
Regarding battery charging rooms, ventilation should be provided __________.
at the highest point of the room
5
If a small motor has been immersed in salt water, it should be ___. I. Thoroughly rinsed in fresh water and completely dried II. Initially started with reduced voltage
both I and II
6
Air gap readings should be taken on electrical generation machinery periodically to ___. I. determine the need for cleaning II. check the condition of the bearings
both I and II
7
Which of the following statements best describes the material known as varnished cambric?
Cotton cloth coated with insulating varnish.
8
If a small motor has been immersed in salt water, it should be ___. I. Thoroughly rinsed in fresh water and completely dried II. Initially started with reduced voltage
both I and II
9
If you disconnect and arrange both ends of a three conductor cable, without any contact between the individual conductors. A low ohmic value between the ends of a single conductor would indicate _____.
continuity of the conductor
10
Which of the following materials is recommended for finishing the slip rings after grinding or turning?
crocus cloth
11
Maintenance of alkaline batteries should include_____.
making certain connections are tight and clean
12
Which of the following materials is recommended for finishing the slip rings after grinding or turning?
crocus cloth
13
Proper storage battery maintenance includes ____.
keeping connections light and casing surface clean
14
The proper way to apply plastic electrical tape to an electric cable splice is to______.
wind the tape so that each turn overlaps the turn before it
15
Which of the following statements best describes the material known as varnished cambric?
Cotton cloth coated with insulating varnish.
16
If violent gassing occurs when a lead‐acid storage battery is first placed on charge, the ____.
charging rate is too high
17
When charging lead‐acid batteries the charging rate should be reduced as the battery nears its full charge to ____.
prevent damaging battery plates
18
Which of the following problems is indicated if lead‐acid battery begins to gas violently when it is first placed on charge?
An excessive charging rate is being applied to the battery
19
If violent gassing occurs when a lead‐acid storage battery is first placed on charge, the ____.
charging rate is too high
20
Air gap readings should be taken periodically on electrical generation equipment to ___.
determine the condition of the bearings
21
Maintenance of alkaline batteries should include_____.
making certain connections are tight and clean
22
Proper storage battery maintenance includes ____.
keeping connections light and casing surface clean
23
Which of the following methods should be used to dress the face of silver‐plated contacts?
A. Sanding with 0000 sandpaper
24
Air gap readings should be periodically taken for electrical generation equipment. The best tool to use to take these measurements is a ____.
tapered, long blade gage
25
The proper way to apply plastic electrical tape to an electric cable splice is to______.
wind the tape so that each turn overlaps the turn before it
26
Which of the following statements is true concerning the cleaning of electrical contacts?
Delicate parts should be cleaned with a brush and an approved safety solvent.
27
If you disconnect and arrange both ends of a three conductor cable, without any contact between the individual conductors. A low ohmic value betweenb the ends of a single conductor would indicate _____.
continuity of the conductor
28
When charging lead‐acid batteries the charging rate should be reduced as the battery nears its full charge to ____.
prevent damaging battery plates
29
Which of the following statements represents the FIRSTstep in seating new brushes on slip rings?
Lay sandpaper between the brush and the slip ring and slide the sandpaper back and forth under the brush.
30
Air gap readings should be taken periodically on electrical generation equipment to ___.
determine the condition of the bearings
31
When a lead‐acid battery begins gassing freely while receiving a normal charge, the charging should ____
be decreased
32
When a lead‐acid battery begins gassing freely whilereceiving a normal charge, the charging should ____
be decreased
33
When mixing electrolyte, which if the following precautions should always be observed?
Add the acid to the water
34
Two contributors of electronic console failures are heat and vibration. To combine some of their effect, preventive maintenance procedures should include ____.
periodic changing or cleaning of console ventilation and control room air conditioning filters
35
Four lamps are connected in parallel in a single circuit. If one of the lamp burns out, the others will _____.
burn with their original intensities
36
When a nickel‐cadmium battery begins gassing while connected to the battery charging circuit, you should____.
do nothing as this is a normal condition when charging
37
A solid‐state circuit is inoperative; the first action that should be taken is to_______.
check the DC supply voltage
38
The removal of paint from electrical equipment such as generators, should be cautiously undertaken because ____.
the paint dust is composed of abrasive and semi‐conducting materials which impair insulation
39
When shipboard electrical distribution circuits are connected in parallel, additional parallel circuits will cause the total circuit resistance to ____.
decrease, causing an increase in the line current
40
When a nickel‐cadmium battery begins gassing while connected to the battery charging circuit, you should____.
do nothing as this is a normal condition when charging
41
Which of the following methods should be used to dress the face of silver‐plated contacts?
Sanding with 0000 sandpaper
42
A lead‐acid battery is considered fully charged when the ____.
specific gravity of all cells reaches the correct value and no longer increases over a period of 1 to 4 hours
43
A common type of protective covering used on electrical conductors is _____________.
fibrous braid
44
When a replacing a fuse with one of a higher rating than the original, which of the following is true?
It endangers the apparatus it is supposed to protect
45
If an alternator is to be inactive for a considerable period of time, which of the following action should be taken?
The brushed should be lifted off the slip rings to prevent pitting of the metal by electrolytic action
46
When a replacing a fuse with one of a higher rating than the original, which of the following is true?
It endangers the apparatus it is supposed to protect
47
Air gap readings should be periodically taken for electrical generation equipment. The best tool to use to take these measurements is a ____.
tapered, long blade gage
48
If an alternator is to be inactive for a considerable period of time, which of the following action should be taken?
The brushed should be lifted off the slip rings to prevent pitting of the metal by electrolytic action
49
Which of the following statements is true concerning the cleaning of electrical contacts?
Delicate parts should be cleaned with a brush and an approved safety solvent
50
When shipboard electrical distribution circuits are connected in parallel, additional parallel circuits will cause the total circuit resistance to ____.
decrease, causing an increase in the line current