Milli-ammeter and its protecting lamp.
Double pole circuit-breaker.
Single pole reverse current circuit breaker.
Direct current ammeter (two way).
Direct current voltmeter.
Alternating current voltmeter.
Double-pole double-throw lever switches.
Double-pole single-throw lever switches.
Receptacles.
Plugs.
Lamps.
D. C. busses.
A. C. "
Charging rheostat.
Field "
Resistance for reverse current circuit-breaker.
Terminal strips.
Fuses.
Fuse clips.
A. This must be learned at casemate.
Q. Point out the following parts of the operating panel:
Signal-block.
Master "
Mine "
Cable terminal block.
Single stroke gong and its switch.
Red lamp and white lamp, and use of each.
Resistance coil and its use.
Earth terminal.
A. C. "
D. C. "
A. C. jaw.
D. C. "
Testing switch on master block.
Firing switch.
Jumper.
Testing switch on mine block.
Automatic switch.
Mine switch.
Power switch.
Automatic switch release.
Solenoid.
The terminal block is provided with binding posts and clips.
A. This must be learned at the casemate.
Q. What is a motor generator?
A. A combination of a separate motor and a generator connected to the same shaft.
Q. What kind of a motor generator is the one in the casemate?
A. It consists of a motor driven by direct current and a generator which delivers alternating current. It has about 1-1/3 H. P.