1-5 Flashcards
The voltage dropped across resistor is
6 volts
Good housekeeping distinguishes a good employee from a(n)
Indifferent one
When tension stringing over a live circuit, ideally______ of clearance shall be maintained.
10 foot
The power or heat lost in a conductor can be calculated with the _____ formula.
2
P=i r
If a company has a ratio of 1:3 of apprentices to journeyman and there are 6 apprentices how many journeyman are there ?
18
What is the sum of 3/8 + 7/32 + 9/16
37/32
Or 1 5/31
The four main components in a stringing operation are the_________ puller, the stringing blocks, and the bull line.
Tensioner
Some utilities require gloves to be worn continuously while working on any structure carrying live conductors. This Is an example of the ________ rule.
Ground or ground
The power consumed in R2 is
1440 W
In a parallel circuit, if the total resistance Is known what is the formula to find total current ?
I=E/R
The ______ radial systems provides for feeding the load from two directions, thereby allowing for defective loads to be normal operation while the fault is being corrected.
Looped primary
Whenever current flows through a wire, a __________ is created around the wire .
A magnetic field
To promote a fast trip out of protective equipment, a ___________ should be installed.
Traveling grounds
A ratio is comparison of two quantities by ___________.
Dividing
A line should be sagged according to the _______
Initial or stringing sag chart
An electrical worker can stay isolated from an energized conductor by_______.
Maintaining minimum approach distance
When two power sources are connected in parallel, the circuit voltage will_________.
Remain the same
The voltage and current values in a transformer primary coil are inversely proportional to the voltage and current values in the secondary coil. A certain transformer has a primary rating of 7200v and a secondary rating of 480v. When the primary current flow, is 8 amperes, the secondary current flow is______.
120 amps
Total resistance of this circuit is
4 ohms
The voltage drop across resistor 2 is _________.
12 amps
Using the given current flow and resistance values, solve for the power rating of r1 in the circuit.
480 watts
A typical four jaw meter socket is supplied by a triplex service line and is energized. The customer main disconnect is in the open position before setting the meter you have taken voltage reading and there is a 120v potential from a top to a bottom jaw in the socket s1 l1 this reading indicates__________.
A ground on the customer side and a potential dead short.
All rotating armatures produce_______
Direct current
The amount of power used by each resistor can be found by using ______ law.
Watts
Conductor attachments that hold securely and protect the conductor from vibration without installing armor rods are _________.
Pre formed ties
The total current from a four-branch parallel circuit with branch currents of 4 amperes, 5 amperes, 5 amperes and 6 amperes is _________. The supply voltage is 120 volts.
20 amps
A distribution transformer is supplied by a 2400 volt primary line. The voltage ratio of this transformer from primary to secondary is 5:1. This unit delivers a secondary potential of volts.
480 volts
In DC generators, the rotating windings are connected to a________ that is segment and reverses the loop connection every half cycle.
Commutator
The Total resistance of 4 resistors connected in parallel will be a value ______ the smallest resistor value in the circuit.
Smaller then
The easier and quicker detection and repair of a breakdown is an advantage of the _________ system
Overhead
A parallel circuit is also a current _______ circuit
Adding
EVH lines require _______ at suspension points and dead ends to prevent the magnetic fields from concentrating in any given location.
Corona shields
If the direction of current in a conductor is knowns, the direction of the magnetic flux lines can be determined by using the ________.
Left hand rule
A 6 AWG solid copper wire has ____ than the same type of wire sized 4 AWG.
More resistance
The power consumed in a parallel circuit that has a source voltage of 12,500 volts and total circuit current of 4 amperes is ________.
50,000
A cable conductor has 1/2 diameter. The cross sectional area of this conductor is ________.
500 kcmil
For proper tolerance, holes bored in wooden poles are 1/16 larger than the bolts used. To install a 1// bolt a _______ auger bit is required.
9/16
The facility connecting the transmission systems to the customers equipment is called the _________.
Distribution systems
When splicing a triplex service wire______
Only the neutral takes a tensión sleeve
During stringing operations ________ is not allowed while the conductor is in motion.
Being on a pole
What is the ratio of 7200 volts to 240 volts ?
30:1
In order for the current to flow through a persons body, there must be a _______.
Difference of potential
Solve for the current flow through R1
.5 amps
What is the total resistance of this parallel circuit?
4 ohms
Whenever a magnetic field cuts through a conductor, a _______ wil be induced into that conductor .
Voltage
If X and Y are directly proportionally and X2 =6. And Y1=4 and Y2=8. The value of X1is _______
3
The relative field strength of a coil is measured in ________.
Ampere- turns
The national electric safety code guidelines requieres a service line attachment on a building to be a minimum of ________ above ground lines.
12 foot
When performing barehand work , no _____ will flow inside the faraday cage.
Voltage
The liner of an insulated bucket truck platform requires ________.
Periodic dielectric testing
