Pastboard Pec Flashcards
In order to protect a personnel and prevent shock, the equipment should be connected good earth ground through the ___.
Cold water pipe
The requires that all energized part of electrical equipment operating at ______ or more shall be guarded against accidental contacts by approved enclosures what is this voltage?
50 volts
If the interrupting rating of a circuit breaker is lower than required, what will happen to the breaker if there is a dead short between two down stream breaker terminals?
the entire breaker will be completely damaged
The ______, or other descriptive marking by which the organization responsible for the product maybe identified, shall be placed on all electric equipment.
Trademark , manufacturer’s name
Conductors of AC and DC rated up to 600 V nominal shall be permitted to occupy the same equipment wiring enclosure, cable tray or raceway. Is this being allowed under Sec 5.1.1.3 (c) (1) art 5.1 ?
True
Consist of a group of wire twisted to form a metallic string.
Stranded wire
If an electrician does not understand that we’re given by the supervisor, which Of the following is best for him to do ?
He asks to repeat and clarify the instruction
The inner strand of ACSR is made of
steel
A small lamp used to indicate that a circuit is energized.
Pilot light
A battery is charged at 15A for 10hour. If the charging voltage is 120 V what is the charging cost at 1.00 peso per KW-hr?
18 pesos
The unit of magnetic flux in SI.
Weber
A lubricant to make pulling of wires or cables through the conduit easier
Talc
Give an example of the an electrical conductor
Brass
If 18 resistance, each of a value of 36 ohms, are connected in parallel, then the total resistance is ______.
2 ohms
A 25 w incandescent bulb rated at 120 V line has burnt out and has to be replaced as soon as possible. There are several lamps available but not of the same rating. Which of the bulbs below the power consumption of the busted bulb?
100watts, 240 volts
Which of the following breaks down rubber insulator?
Acid
The current carrying capacity of the fuse material depends on
All of these
A resistor of 3 ohms is connected in parallel with one of 2 ohm resistance. If the combination is connected in series with a 4 ohm resistor, what is the equivalent resistance of the whole combination of three resistors?
5.2
In a circuit breaker, the current which exists at the instant of contact separation is known as
Interrupting current
What resistance must be connected in parallel with a 1.0 ohm resistance to give an equivalent resistance of 0.2 ohm?
0.25
For a ceiling fan, which of the single phase motor is used?
Capacitor start and run type.
