PEC BOARD 2016 Flashcards
What is the lowest dielectric strength of transformer oil which is acceptable to PEC? (V)
25,000 volts
is the connection of between conductive or inductive metal object in an element of lightning protection sytem to accomplish electrical continuity.
Bonding
Soft iron is most suitable for use in a _________
temporary magnet.
As the power factor of the circuit is increased reactive power is ______.
decreased
An electrical outlet is constructed so that moisture will not enter the enclosure is classified as _______.
watertight
- A ________ is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine measured in revolution per minute.
Tachometer
If the circuit voltage is increased, all else remains the same only the _____ will change.
current
____ has a negative temperature coefficient of resistance.
Carbon
______ conductors shall be used for wiring on fixture chain.
Stranded
Solenoids are made of ______
electromagnets.
Basically, all electric motors operate on the principle of ______ or _____.
repulsion
induction
To fasten a box to a tera cotta wall, you would use, ______(2)
rawl plugs or toggle bolts.
The total opposition of to current flow in DC is expressed in ohms is _______
resistance.
Two 500 watt lamps connected in series across a 120V source draws 3A, the total wattage consumed is _____w.
360W
You have an adjustable trip coil rated at 5A on a 200A switch. If you want the switch to trip at 120A, the trip coil should be set to ___A
3A.
Three horsepowers is equivalent to ______W.
2238 watts
Electrical appliances are connected in parallel because it ______________________
makes the operation of appliances independent to each other.
A ________ is one or more rooms used as a housekeeping unit & having permanent cooking & sanitation provision.
dwelling unit
________ has the highest electrical resistance among water, iron and brass.
Paper
When accidentally splashing a chemical into the eyes the best immediate first aid solution is to ______________
flush eyes with clean water.
The efficiency of a motor is measure of how well: _______________________
it converts electrical energy into mechanical energy.
A good magnetic material is ____ among aluminum, brass and copper.
iron
An ________ is the smallest part of an atom with negative charge
electron
.
.
