Outside Electrical NAMTS
What are Red electrical gloves rated at?
1,000V
What are the SDS sections?
1.Product info 2.Hazardous identification 3.Composition 4.First aid 5. Fire fighting measures 6.Accidental release measures 7.Handling and storage 8.Exposure control,PPE, exposure limits 9. Physical and chemical properties 10. Stability and reactivity 11. Toxicology information 12. Ecological info 13. Disposal considerations 14. Transportation Info 15. Regulatory info 16. Other
Green gloves?
17,500V
How many hours and at what amperage can a casualty power cable be used?
200Amps for 4 hours
What is considered low risk?
30 volts or less
What is considered medium risk?
30-1000 Volts
How many feet is the electrical boundary of a medium risk live check?
4 feet
What are shore power cables rated at?
400 Amps
White gloves?
7,500
When should you where single hearing protections?
84 dB and impact 140 dB
When should you wear double hearing protection?
96 dB
What is a transformer?
A device with no moving parts that transfers electrical energy by magnetic induction from one circuit to another that is electrically isolated
What is a block diagram?
A drawing that shows various function of a system by a series of blocks. Blocks indicate what happens in each
Where is a ground indicator located in the circuit?
After the transformer
When are hearing tests completed?
Annually When you check in First joining the Navy When you get out of the Navy A significant threshold shift occurs
Why might there be contact chatter?
Bad contacts Broken shading coil Excessive jogging
What does the FB stand for in cable designation?
Battle power
Q coil
Below the quarter deck
Why might you have noisy contractors?
Broken shading coil Magnet faces not true Dirt or rust Low voltage
New system: CP
Casualty power
New system: K
Control power
New system: MC
Coolant Pump Power
New system: D
Degaussing
What does the D stand for in cable designation?
Degaussing
Is *current* directly or inversely proportional to *voltage*?
Directly proportional. (Current increases with increasing voltage.)
Why might your contacts overheat?
Dirty contact tips Sustained overloads Insufficient tip pressure Loose connections
What is the purpose of shorting probes?
Dissipate the stores energy
What does the P stand for in cable designation?
Electric propulsion
New system: R
Electronics
New system: EL
Emergency lighting
New system: EP
Emergency power
New system: G
Fire control
What does the G stand for in cable designation?
Fire control
What is considered hazardous material?
Flammable/combustible Toxic Corrosive Oxidizing Aerosol Compressed
What does the F coil do?
Forward
What is used HM?
HM that has been used in a shipboard process
What does the M Coil do?
Horizontal plane
What is Ohm's Law?
I=E/R (Current is directly proportional to the voltage and inversely proportional to the resistance.)
New system: C
Interior communication
What does the C stand for in cable designation?
Interior communications
Is *current* directly or inversely proportional to *resistance*?
Inversely proportional
How does a ohmmeter work?
It passes a constant current into and unknown resistance and measures the the resulting voltage drop
What is the designation for casualty power cables?
LS-THOF-42
A coil
Loops on vertical fore and aft planes
What is a snap gauge?
Measure outside diameter of shafts,pins, studs, and hubs
What is a dial bore?
Measures a cylindrical bore or check a bore for out of roundness or taper
What does a dial indicator do?
Measures straightness of the shaft with the accuracy of .001 of an inch
New system: MS
Minesweeping
What does the MS stand for in cable designation?
Minesweeping
New system: N
Navigational lighting
New system: FL
Night Flight Lights
Who do you report spill too?
OOD, DCC, CCS
What is inductance?
Opposes any change in current flow
Why might your coils overheat?
Overvoltage Wrong coil Rapid jogging Used above current rating Loose connections Improper installation
What is the equation for power?
P=IE
What is a danger tag?
Prohibits operation or removal of equipment that could jeopardize safety of personnel or endanger equipment
New system: PP
Propulsion Power
What does the R stand for in cable designation?
Radio or radar
What does the RL stand for in cable designation?
Running, anchor, signal lights
What does SDS stand for?
Safety Data Sheet
New system: L
Ships service lighting
What does the F stand for in cable designation?
Ships service lighting and general power
New system: P
Ships service power
What is a pictorial wiring diagram?
Shows actual pictorial sketches of the various parts of a piece of equipment and the electrical connections between the parts
What is an elementary wiring diagram?
Shows each conductor, terminal, and connection
What does the S stand for in cable designation?
Sonar
The new system consists of 3 parts what are they?
Source, voltage, and service
New system: SF
Special frequency power
What is a caution tag?
Special instructions
What is Capacitance?
Stores energy in an electrostatic field
What is conductance?
The ability of a material to pass electrons (opposite of resistance)
What is the definition of power?
The rate of energy transfer
What is a SPST switch?
They have an ON and OFF position Example: light switch
What is a SPDT switch?
Turns a circuit on in one place and a circuit off in another place. Example: white red switch
What is Excess HM?
Unused HM in full, properly sealed containers
What is a single line diagram?
Uses single lines and graphic symbols
What is Ohm's Law?
V=IR
L coil
Vertical
When should eye protection be worn?
War fighting/training operation Cutting/ welding Drilling Grinding Milking Chipping Sand blasting
What is galvanic corrosion?
When dissimilar metals are in the presence of an electrolyte
When do ABTs transfer to alternate power?
When normal voltage drops to 60 to 70% of normal voltage for more than 0.3 to 0.5 seconds
What is impedance?
When reactance and resistance combine and oppose the flow of current
When do ABTs move back to normal power?
When voltage recovers to 85 to 95% of normal voltage