QUESTIONS 1-46 THROUGH 1-59 PERTAIN TO
THE 12-INCH MERCURY-XENON AND MODIFIED
MERCURY-XENON ARC SEARCHLIGHTS.
When the main arc is established, the voltage of
the primary transformer drops to a minimum of
how many volts?
What is the purpose of five resistors connected
To limit the current at starting and during
To keep the searchlight operational
To keep the light level
To shut the light off if the voltage is too
The increase in light intensity greatly increases
which of the following conditions?
After the mercury-xenon lamp arcs, you must
return the starter switch to the START position
to make sure that the required starting current
does NOT cause what damage to occur to the
1. Decreased intensity
1. Replacing the lamp
2. Arc too soon
2. Adjusting the beam
3. Electrical components malfunction
3. Lubricating the shutters
4. Operating the searchlight
Approximately how long does it take the lamp
What happens to a mercury-xenon lamp that has
to reach maximum brilliance?
reached the end of its usefulness?
2 to 3 min
3 to 4 min
4 to 5 min
5 to 6 min
Because the life of the lamp is reduced
considerably at extreme angles, the light should
NOT be depressed or elevated more than how
many degrees for extended periods of time?
When lighting off the lamp, when should you
release the start switch?
1. When maximum brilliance is reached
2. When you have finished communicating
3. When approximately 5 minutes has elapsed
4. When the lamp arcs
What may result if oil or grease comes in
contact with the lamp?
The brilliance will decrease
The brilliance of the lamp will increase
The quartz lamp shell may explode
The glass lamp may crack
What agent is the best to use to clean a soiled
1. Soap and water
3. Light oil
4. Alcohol or other grease-free solvent
Which of the following maintenance procedures
requires the use of gloves and a face shield?
It is turned in to the nearest naval
It is smashed beyond recognition
It is turned over to the mercury-control
It is incinerated