What does the letter “G” represent on a cable tag?
Fire control (Page 203 in PDF)
31-4P-(3-125-2); what does the (3-125-2) mean?
Supplying power distribution panel located on the third deck, frame 125, port side (Page 204 in PDF)
Where should tags be located on a cable?
Close as possible to each point of connection, on both sides of decks and bulkheads (Page 204 in PDF)
What are the 2 types of UPSs?
“Lin-interactive” and “on-line” (Page 271 in PDF)
What re the 2 main tasks of a UPS?
Supply input power to mission critical equipment during power loss
Improve power quality (Page 271 in PDF)
What type of lune-interactive UPS are acceptable for shipboard use?
Those that exhibit a continuous output voltage waveform (Page 271-272 in PDF)
What is the resistance of the human body under unfavorable conditions?
500 ohms (Page 340 in PDF)
What is the human body resistance in warm and moist marine environments?
As low as 300 ohms (Page 340 in PDF)
What 2 conditions must be present for current to flow through a person?
The person must form part of a closed circuit in which current can flow
Voltage must be present to cause current to flow (Page 340 in PDF)
The ground wire for a workbench shall be an insulated, stranded wire size _______ AWG?
2 AWG (Page 365 in PDF)
What color should be the ground cable for a workbench?
Green (Page 365 in PDF)
A ground bus serving a row of workbenches shall be continuous (un-spliced) cable not to exceed ____________ feet in length.
50 Feet (Page 366 in PDF)
Resistance from the workbench metal structure to the hull shall be less than or equal to what?
.1 ohms (Page 365 in PDF)
Equipment grounding leads shall be provided for each _________ feet of work bench installed?
4 feet (page 366 in PDF)
What is the correct wire gauge for workbench ground leads?
10 AWG (Page 366 in PDF)
How thick shall insulation be on the working surface on a workbench?
3/8 inch thick insulation (Page 368 in PDF)
What type of electrical matting is used?
Type 1 (Page 369 in PDF)
On electrical matting no seams shall be within __________ feet of electrical/electronic workbenches.
3 feet (Page 369 in PDF)
How many types of disconnect circuits are used in the fleet?
3 (Page 371 in PDF)
What is a Type 1 disconnect switch?
One switch disconnects all power (Page 371 in PDF)
What is a Type 2 disconnect switch?
Multiple type 1 disconnect switches are wired so activation of any switch secures ALL power (Page 371 in PDF)
What is a Type 3 disconnect switch?
Switches or breakers in power panels to disconnect each type of power to workbenches (Page 371 in PDF)
A bulkhead mounted disconnect switch shall be ____________ inches above the deck, within a red-painted target?
48-54 inches (Page 371 in PDF)
There are _________ classes of rubber insulated gloves available in the stock system, the primary feature being the wall thickness of gloves and their maximum safe voltage, which must be identified by a colored label on the glove sleeve.
4 (Page 377 in PDF)
What does the color label on rubber insulating gloves represent?
Label colors indicate max safe voltage of gloves (Page 377 in PDF)
True or false; the rubber insulating gloves’ maximum safe use voltage classification must be greater than or equal to the line-to-line voltage rating of the circuit on which they are to be used.
True (page 377 in PDF)
What are the 6 common ways insulated gloves get damaged?
Snags
Compression cracking
Fold cracking
Reversed glove storage
Chemical damage
Sun damage (Page 377 in PDF)
What are the four colors for each class of rubber insulated gloves and the max voltage for each?
Red – Max 1000 Volts
White – Max 7,500 Volts
Yellow – Max 17,000 Volts
Green – Max 26,500 Volts (Page 379 in PDF)
Electronic equipment should not be installed in magnetic fields having field densities greater than ________ micro-Tesla’s unless the equipment is specifically designed to operate in greater field densities?
500 micro-Tesla’s (Page 19 in PDF)
Hand operated devices including switches, jacks, and push buttons shall be located at least _______ feet but no more than ________ feet above the deck?
1 ft.; 6ft. (Page 19 in PDF)
What is Class 1 ESD voltage?
Susceptible to damage from ESD voltages of0to 1,999 volts (Page 22 in PDF)
What is Class 2 ESD voltage?
Susceptible to damage from ESD voltages of 2,000 to 3,999 volts (Page 22 in PDF)
What is Class 3 ESD voltage?
Susceptible to damage from ESD voltages of 4,000 to 15,999 volts (Page 22 in PDF)
Items that are susceptible to ESD voltages greater than 16,000 considered called what?
Non-ESD Sensitive (Page 22 in PDF)
In an Electrostatic safe environment what must the relative humidity be at?
50 % (Page 23 in PDF)
Responsibility for the safety of personnel is vested in who?
Commanding Officer (Page 27 in PDF)
True or False; Never work on electronic equipment by yourself, have another person qualified in first aid for electrical shock present at all times.
True (Page 27 in PDF)
Who should also know which circuits and switches control the equipment and should be given instructions to pull the switch immediately if any danger is imminent?
Safety Observer (Page 27 in PDF)
Radar modulator pulse cables and sonar transducer cables are physically separated at least ________ inches from all other cables, except at the point of entrance to the modulator, transmitter, or transducer?
18 inches (Page 29 in PDF)
What is the safe distance from UHF/VHF omnidirectional antennas?
20 Feet (Page 39 in PDF)
RF Burn Hazards primarily limited to communication frequencies, but are the most concerned at what wavelength?
HF band (2-30 MHz) (Page 39 in PDF)
How would you break a vacuum seal on a CRT?
Place in carton with face down and break locating pin from CRT’s base (Page 40-41 in PDF)
True or false; the use of steel wool or emery paper or cloth within electronic equipment spaces is strictly forbidden?
True (Page 41 in PDF)
What is the manual charging rate for a nickel cadmium battery?
c/10 (Page 42 in PDF)
What is the trickle-charge rate for a nickel cadmium battery?
c/100 (Page 42 in PDF)
Certain electronic equipment are provided with built-in ___________ safety probes?
Special-Purpose (Page 52 in PDF)
How many classes or rubber insulating gloves available in the stock system?
4 (Page 52 in PDF)
What is the rubber insulating gloves’ maximum safe use voltage classification?
Must be greater than or equal to the line-to-line and line-to-neutral voltage rating of the circuit on which they are to be used (Page 53 in PDF)
When a DANGER SHOCK or VOLTRAGE HAZARD sign is required?
When conductors are present at or above 30 volts RMS or DC (Page 54 in PDF)
All contacts, terminals, and like devices having potentials in excess of _________ volts RMS or DC are clearly marked “DANGER HIGH VOLTAGE (maximum voltage applicable) VOLTS”?
500 (Page 54 in PDF)
Where should stack gas warning signs be posted?
Top and bottom of the ladder (Page 54 in PDF)
How often should the EMO require personnel to demonstrate CPR practical knowledge?
At least quarterly (Page 54 in PDF)
What is the goal of the 2M/MTR programs?
Is to test and repair 80% of failed CCA’s in shipboard electronic equipment (Page 71 in PDF)
What is AFFF ratio (AFFF concentrate to water)?
94% water to 6% AFFF (Page 100 in PDF)
What are 2 sizes of PKP extinguishers?
18 and 27 lbs. (Page 201 in PDF)
What is Range and Discharge time of 18lbs PKP extinguisher?
Range – 19FT
Discharge 10 seconds (Page 201 in PDF)
What is Range and Discharge time of 87lbs PKP extinguisher?
Range – 21FT
Discharge 11 seconds (Page 201-202 in PDF)
One extinguisher is normally located within ___________ feet of equipment with a high potential for electrical fire.
30 Feet (Page 202 in PDF)
The standard Navy CO2 fire extinguisher has a rated capacity (by weight) of _________ pounds of CO2?
15 pounds (Page 203 in PDF)
Rapidly expanding CO2 being expelled from the extinguisher cause the extinguisher to become quite what?
Cold (Page 203 in PDF)
When fighting a fire with a CO2 extinguisher where should you direct the flow?
Base of the fire (Page 203 in PDF)
What is the maximum effective range of a 15-pound CO2 extinguisher?
4 to 6 feet (Page 203 in PDF)
In continuous operation, the 15-pound CO2 extinguisher will be expended in approximately ____________ seconds?
40 seconds (Page 203 in PDF)
CO2 portable fire extinguishers are used primarily for small electrical fires (class C) and have limited effectiveness on class B fires. Their use shall be confined to class B fires no greater than ____________ square feet?
4 square feet (Page 204 in PDF)
With CO2 portable extinguishers what will not preclude the danger of fire or explosion?
Grounding of the tank from static electricity (Page 204 in PDF)
When a crew member discovering a fire or indication of a fire what must be done immediately?
Sound the alarm (Page 253 in PDF)
If an enclosed fire compartment is abandoned, ____________ the door(s) and other openings to reduce the supply of fresh oxygen and limit the burning rate of the fire while the fire party is being staged.
Close (Page 253)
The fire compartment door(s) should remain ____________ during initial response to maintain a breathable atmosphere for unprotected initial responders.
Open (Page 253)
Portable PKP and carbon dioxide extinguishers are provided for which classes of fires?
Class B and C (Page 253 in PDF)
True or False; The simultaneous discharge of two portable extinguishers onto a fire is more than double the effectiveness of discharging one after the other.
True (page 253 in PDF)
AN energized electrical fire is a class C fire. The most effective tactic is to do what?
De-energize and handle the fire as a class A fire (Page 323 in PDF)
When using a fog on a nozzle, how far do you need to be to fight a class C fire?
4 feet (Page 323 in PDF)
What is the first step to fighting a Class Charlie fire (Electrical Fire)?
Secure the power (Page 324 in PDF)
Use of what extinguisher is preferred method for attacking an electrical equipment fire or a small “Class A” fire in the vicinity of electrical equipment?
CO2 (Page 324 in PDF)
What pattern on the vari-nozzle is used for electrical fires?
Fog (Page 324 in PDF)
When using a fog on a nozzle, how far do you need to be to fight a class C fire?
4 feet (Page 324 in PDF)
When can an electrical fire be deemed completely out?
Until environment is accessed and visually inspected (Page 325 in PDF)
What classification is unauthorized disclosure could reasonably be expected to cause SERIOUS damage to national security?
Secret (Page 23 in PDF)
Which troubleshooting step is used when you use the front panel controls and other built-in indicating and testing aids used to further elaborate on the symptom?
Identifying the Symptom (Page 46 in PDF)
Which troubleshooting step is to formulate a number of logical choices as to the basic cause of the symptom, or what function is at fault and make logical choices by the use of tech manuals?
Identifying the Malfunction (Page 46 in PDF)
Which troubleshooting step is normally accomplished by using the servicing block diagrams in technical manuals?
Localizing the Malfunction (Page 46 in PDF)
Which troubleshooting step is the use of test methods like waveform analysis, voltage checks, resistance checks, tube testing, semiconductor testing and module testing?
Locating the Cause of Malfunction (Page 46 in PDF)
Which troubleshooting step is when the faulty component has been located, but prior to making the repair, the procedures followed up to this point should be reviewed to determine exactly why the fault affected the equipment in the manner it did?
Failure Analysis (Page 46 in PDF)
How much voltage does a megger put out?
500V (Page 80 in PDF)
The value of resistance is measure in what?
Ohms (Page 80 in PDF)
______________ the resistance, the better the system insulation and consequently, less current flow between conductor and ground.
Higher (Page 80 in PDF)
Since _____________ ideally have an infinite impedance to DC current, their presence cannot be detected by a megger or insulation resistance test.
Capacitors (Page 80 in PDF)
What are made to ensure that the system will operate properly, not to make the system safe?
Insulation resistance tests (Page 82 in PDF)
True or False; Intentionally taking a shock at any voltage is always dangerous and is STRICTLY FORBIDDEN.
True (Page 83 in PDF)
Never work alone on electronic equipment by yourself; have a _________________ qualified in first aid for electrical shock present at all times?
Safety Observer (Page 83 in PDF)
True or False; Voltages in excess of 300 volts shall not be measured by probing or holding the test probe in the hands.
True (Page 84 in PDF)
Whenever measurements are necessary on equipment employing potentials in excess of 300 volts or where rubber gloves cannot be worn what is the first step?
The equipment (or circuit) shall first be de-energized (Page 85 in PDF)
Since capacitors may not be completely discharged when first shorted, what should be done to make sure the capacitor is discharged?
The operation of shorting the capacitor should be repeated several times (Page 85 in PDF)
Short circuit the terminals to ground using an authorized safety ____________________ or built-in grounding bar for this purpose.
Shorting Probe (Page 86 in PDF)
Operating stations, guard rails, and normal personnel thoroughfares shall be designed to provide at least a ________ foot horizontal and ___________ foot vertical clearance from MF/HF transmitting antennas.
4 foot horizontal; 8 foot vertical (Page 86 in PDF)
Almost all modern electronic equipment’s are provided with various built-in-safety devices (such as interlock switches) to prevent technical and maintenance personnel from accidently coming into contact with electrical potentials in excess of __________ volts RMS or DC.
70 volts RMS or DC (Page 87 in PDF)
True or False; Steel wool or emery, in any form can be used on or near electronic equipment.
False (SHALL NOT) (Page 88 in PDF)
How should Ni-Cad batteries be charged?
In Series (Page 89 in PDF)
The approved electrical matting is made of _____________ material, some with a diamond-shaped surface.
Fire-retardant (Page 115 in PDF)
Use of electrical matting will serve as a safety measure around electric and electronic equipment’s where electrical potentials up to but not exceeding _____________ volts may be encountered.