eg 2 week 2

Question 1

how much are 3 phase generators spaced apart from each other?

Answer 1

120 degrees

Question 2

how many phases are delivering power when 1 phase is at 0?

Answer 2

2

Question 3

in a wye system, coil current and phase current are?

Answer 3

the same

Question 4

in a in a delta system, coil voltage and phase voltage are?

Answer 4

same

Question 5

in a delta system, phase current is higher than coil current by a value of

Answer 5

1.732

Question 6

in regards to fault protection, which system is more reliable?

Answer 6

four wire wye

Question 7

which two systems appear the same in the field?

Answer 7

delta - ungrounded wye

Question 8

all generators connected to a regional transmission network are all the same angle of rotation at any given time?

Answer 8

true

Question 9

if a generator begins to lead or lag, protective equipment will automatically

Answer 9

open

Question 10

most rotation errors in isolated locations on distribution lines are usually caused by?

Answer 10

line workers

Question 11

changing the sequence of rotation will change what?

Answer 11

direction of motors

Question 12

first step to phasing properly is to ?

Answer 12

verify meter is working properly

Question 13

when the magnetic field peaks between the stator poles, what happens to the current?

Answer 13

induced in the rods of rotor

Question 14

3 phase power delivered to a load is?

Answer 14

constant

Question 15

the predominant electrical system used today is

Answer 15

wye

Question 16

in a delta system voltage stays

Answer 16

the same

Question 17

in a wye coil current stays

Answer 17

the same

Question 18

phase current =

Answer 18

coil current x 1.732

Question 19

a phasing meter is a what?

Answer 19

high voltage meter

Question 20

in a delta system coil voltage =

Answer 20

system voltage

Question 21

in a wye system voltage =

Answer 21

coil voltage x 1.732

Question 22

what system is the most widely used system?

Answer 22

four wire wye system

Question 23

if the phase sequence is unchanged , rotation will remain unchanged, true or false

Answer 23

true

Question 24

in a delta system phase current =

Answer 24

coil current x 1.732

Question 25

in a wye system coil current =

Answer 25

phase current

Question 26

what has no reference to ground?

Answer 26

delta

Question 27

what has no neutral?

Answer 27

delta

Question 28

what are the same on a wye?

Answer 28

coil current and phase current

Question 29

is there rotation for single phase?

Answer 29

no

Question 30

what would be an indication you are in phase?

Answer 30

0 volts in sequence

Question 31

what is a stator in a motor?

Answer 31

stationary part

Question 32

what is a rotor in a motor?

Answer 32

the rotating part

Question 33

line sequence a linecrew might spray in the street before working a pole?

Answer 33

ground grid

Question 34

what is required before using a phasing meter?

Answer 34

phase tester