Trailing Cables
Transformers
Measurements
Electric Motor
Diesel
100
This many temporary splices are allowed in a trailing cable.
What is one?
100
If surface transformers are isolated by elevation, they shall be at least how many feet above the ground.
What is eight feet or more?
100
The maximum allowable surface temperature of all components on machines approved under schedule 2G.
What is 150° C or 302° F?
100
This type of DC motor has a series field and shunt field windings.
What is a compound motor?
100
This converts heat energy to kinetic energy.
What is a diesel engine?
200
When cable couplers are constructed, this conductor should "break" last when the coupler is being uncoupled.
What is the ground conductor?
200
This must be posted conspicuously at all transformer stations on the surface and underground.
What is suitable danger signs?
200
Cable reels are required on equipment traveling in excess of this speed.
What is 2.5 miles per hour (mph)?
200
The maximum allowable nominal voltage of an electric motor on a permissible machine is this.
What is 4,160 volts?
200
Fuel filters are rated in this .
What is microns?
300
Daily Double Temporary splice can not be made in a trailing cable within how many feet of the machine except cable reel equipment.
What is 25 feet?
300
On a high voltage step down transformer, this winding will have the smaller current carrying capacity.
What is the primary?
300
Beltline control switches are to be installed at this distance.
What is at least every one thousand feet?
300
This type of cover would provide access to brushes on a permissible motor.
What is a handhole cover?
300
Safety fueling cans must be limited to a nominal capacity of this.
What is 5 gallons or less?
400
This is the minimum allowable size for a trailing cable on direct current powered shuttle cars.
What is No. 4 AWG for DC (No. 6 AWG for AC)?
400
How high shall the fence be around surface transformers.
What is 6 feet?
400
Daily Double Insulated J-hooks may be used to suspend insulated power conductors for temporary installation for a period of not more than this.
What is six months?
400
Each permissible motor shall have an automatic device to protect it from this.
What is overcurrent?
400
This is the maximum number of safety cans that can be transported on a vehicle at any time.
What is one?
500
This is the maximum speed of travel of a machine when receiving power through a portable (trailing) cable.
What is 6 mph?
500
If the conductors of a balanced, three-phase circuit pass through a current transformer, how many amps will flow in the transformer?
What is 0 amps.
500
A qualified person shall make manual tests for methane during roof bolting operation at no less than this interval.
What is at least every 20 minutes?
500
This will happen if two terminal leads that feed a three-phase motor are reversed.
What is the motor's rotation will reverse?
500
The filler cap on a non-permissible diesel underground shall be this.
What is self-closing?
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