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IC1 Questions Flashcards

0
Q

When using a multimeter to check continuity of the ground conductor from the tool case to the dummy receptacle, be sure the reading is…

A

Less than 1ohm

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1
Q

What is the max safe voltage of rubber gloves that are labeled with the color white?

A

7,500V

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2
Q

Who is responsible for understanding and observing safety standards and regulations on board the ship?

A

All individuals

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3
Q

What publication specifically contains general shipboard safety precautions?

A

OPNAVINST 5100.19E

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4
Q

What color are warning signs?

A

Red and white

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5
Q

What color are caution signs?

A

Yellow and black

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6
Q

When are danger shock hazard signs used?

A

When voltages are between 30 and 500 volts.

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7
Q

Warning plates are installed in small craft to warn personnel of what potential?

A

Explosive vapors

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8
Q

What color is a caution tag?

A

Yellow

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9
Q

What color is a danger tag?

A

Red

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10
Q

Can equipment with an out of calibration label still be used?

A

Yes, with extreme caution

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11
Q

Isolated receptacle circuits are designed to limit ground leakage currents to how many milliamperes?

A

10 milliamperes

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12
Q

Why must you short-circuit the secondary of a current transformer before you disconnect the meter?

A

To prevent an extremely high voltage build up

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13
Q

When, if ever, is it permissible to block an interlock switch on a piece of equipment?

A

When authorized by the CO for operational reasons

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14
Q

What do you use to discharge capacitors?

A

Shorting probe

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15
Q

What class of rubber gloves should be worn when dealing with 5000volts?

A

Class II

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16
Q

When installing rubber floor matting, you should ensure there are no seams within what minimum distance of an electrical hazard?

A

3 ft

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17
Q

Why should a dummy outlet be installed near a work bench?

A

To test the grounding conductors on portable power tools

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18
Q

What is an acceptable resistance reading for the ground connection between the ships hulk and metal frame of a portable electric drill?

A

1ohm or less

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19
Q

Under normal usage, the maximum length of an extension cord used with portable tools should NOT exceed how many feet?

A

25 feet

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20
Q

The current coil of a wattmeter or an ammeter must be connected in what way?

A

In series with the load

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21
Q

In signal generators and oscilloscopes, how are the effects of moisture minimized?

A

By built in heaters

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22
Q

Before being used on electronic equipment, metallic tools should be insulated by wrapping with what material?

A

Two layers of rubber tape or vinyl plastic tape, half lapped

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23
Q

If cared for properly, lead acid storage batteries should last for what max period of time?

A

4 or more years

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24
The charging rate of a lead-acid storage battery being charged should be lowered under what circumstance?
If the temperature of the battery reaches 125 degrees
25
What is the proper procedure for mixing electrolyte?
Pour the acid slowly into the water
26
Dry- cell batteries should be removed when the equipment they are used with is going to remain idle for what min length of time?
2 weeks
27
To remove large fragments of a broken radioactive tube, what should be used?
Forceps
28
Why should you be extremely cautious when handling a CRT?
Because it's glass envelope encloses radioactive gas
29
Before disposing of a CRT, you should break off the tip of the glass vacuum seal with what?
Pliers
30
What is the proper method for disposing of aerosol dispensers?
Put in approved waste receptacle
31
What solvents should NEVER be used for cleaning electrical equipment?
Inhibited methyl chloroform
32
What is the preferred grade of insulating varnish used in the navy?
-clear baking varnish (CB)
33
What materials should never be used to clean contacts
Steel wool and emery cloth/paper
34
A fire breaks out in a piece of electrical equipment, what is the first thing that should be done?
De-energize the piece of equipment
35
Low voltage (115v and below) circuits are NOT dangerous because they do not cause death. ( true or false)
False
36
The victim of electrical shock by a portable drill should be freed of contact how?
Unplug the drill
37
What is the purpose of artificial ventilation?
To provide a method of air exchange
38
To be effective, CPR must be started within what max length of time?
4 minutes
39
A wound that is often complicated by crushing of the tissues is classified as what?
A laceration
40
When direct-pressure method is used and fails to stop the bleeding what action should be taken?
Use the pressure point method
41
What burns are for the most part NOT caused by heat?
Chemical
42
What is the most important factor in determining the seriousness of a burn?
The extent of the body surface burned
43
Which of the following is a characteristic symptom of a a secondary- degree burn?
Blistered skin
44
Hazardous noise areas that produce continuous and intermittent sound levels greater than what min level?
84db
45
A worker should wear double hearing protection when working around noise sources above what min sound level?
104 db
46
Exposure of personnel to excessive heat, humidity, and thermal radiation while under a continued work load can result in what?
Heat stress Heat stroke Heat exhaustion
47
Heat stress survey must be ordered when the temperature in a space exceeds what min level?
100 degrees F
48
To what does the rating of a switch refer?
The maximum allowable voltage and current of the circuit in which the switch is to be used
49
Switch contacts should be open and closed slowly to minimize arching. (True or false)
False
50
The single- throw switch has what total number of pole?
Two
51
What are the voltage and amp ratings of the various types of toggle switches?
20 volts to 600 volts | 1 amp to 30 amps
52
What is the normal contact arrangement of a push- button switch?
Either make or break type
53
What does the first number in a rotary snap switch designation indicate?
Current rating
54
For a pile switch, when operated, what terminals are connected together?
2 and 3 | 5 and 6
55
A type J multiple rotary switch with five sections has what total number of stationary contacts and moveable contacts?
8 movable | 2 stationary
56
In type 3 JR switch, what total number of moveable wiper contacts are there per section?
One
57
What is the purpose of the stop deck of a JR?
It enables the switch to be set to a desired number of positions
58
How does the JL switch compare to the JR switch?
The JL switch is rated the same as the JR switch
59
What kind of contacts are used in JA switches.
Silver to copper
60
The JF switch replaces what type of switch?
Toggle switches in the 10/20- switch boxes for sound powered telephone applications
61
What type of interiors are used in most lever- operated switches
JR
62
What means is used to distinguish the collision alarm on a submarine?
A star shape
63
How is a typical pressure- operated switch similar to a typical temperature- operated switch?
- both are single- pole, single throw, and quick-acting switches - both contain a bellows or diaphragm the works against an adjustable spring - both contain contacts that are closed automatically by an adjustable spring when a preset value of the operating condition is reached
64
How is the operating point of a cam- operated mechanical switch varied?
By adjusting the contact gap of the micro switch
65
How many pairs of terminals are used in water switches?
One
66
QA
Air- locking Indicator
67
PW
Clutch- position indicator
68
DW
Wrong - direction alarm
69
SP
Shaft- position alarm
70
LS
Submersible steering- gear alarm
71
How is the liquid- level float switch changed from normally open to normally closed?
By turning over the magnetic core
72
What is circuit FH?
Sprinkling alarm systems
73
Which of the following troubles is caused by excessive tightening of the packing gland nut in a watertight rotary switch?
Improper positioning of the switch
74
When servicing a pair of copper contacts (one is slightly burned, the other badly burned), which of t he following procedures should you follow?
Replace both contacts
75
You should NOT attempt to remove the tarnish the forms on silver contacts for which of the following reasons?
Because the tarnish improves the operation of the contacts
76
How is the coiled a relay that is designed for shunt connection wound?
With a large number of turns of small wire
77
How are control relays classified?
Open Semi- sealed Sealed
78
What causes the bimetallic strips of a thermal relay to bend when heat is applied?
Lag coil or slug influencing their magnetic properties
79
What two windings are used in latch-in relays?
Trip coil and reset coil
80
To close the contacts of an AC shunt relay, a voltage must be applied to what components?
The operating current
81
What should you use to clean a relay?
Burnishing tool
82
What type of relay has multiple sets of contacts?
Clapper relay
83
What total number of adjustment are there on a two- coil, series-type relay?
Two
84
What type of relays are also known as contractors?
Power relays
85
The "cone and crater" effect that is associated with relay contacts is caused by what condition?
Current flowing in one direction through the relay
86
When one of the contacts of a shunt relay is badly pitted, what action should you take?
When one of the contacts of a shunt relay is badly pitted, what action should you take?
87
When the relay contact springs are bent during cleaning, what action should you take?
Straighten the contact with a point bender
88
Solenoids are used for which of the following reasons?
To convert electrical energy into mechanical motion
89
What is the second step in checking an improperly operating solenoid?
Check the energizing voltage
90
What type of fuse holder will hold two fuses?
FHL10G

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