Flashcards in Ch. 10 - Power Distribution.csv Deck (70)

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2

## Measure amplitude

###
RMS

(10-2)

3

## Frequency of electric power =

###
50 or 60 Hz

(10-3)

4

## Two wave forms that match each other in electrical degrees are ________

###
In Phase

(not out of phase, in sync, etc..)

(10-4)

5

## Electrical systems between serving utility & customer site is:

###
Distribution system

(10-7)

6

## V = IR

###
Ohm's Law

(test)

(10-9)

7

## V= I= R=

###
V= Voltage

I = Amperes

R = Resistance

(10-9)

8

## Formula for Ohm's Law always applies to _____.

###
DC

(test)

(10-10)

9

## Z =

###
Impedance

(test answer)

(10-10)

10

## Inductive reactive X =

###
magnetic field

(10-10)

11

## Capacitive reactance X =

###
electrical field

(10-10)

12

## Voltage & Current in phase =

###
resistive load

(figure 10.9)

(10-11)

13

## Current lags voltage =

###
Inductive circuit

(figure 10.10)

(10-11)

14

## Current leads voltage =

###
Capacitive load

(figure 10.11)

(10-12)

15

## Apparant power =

###
Measured voltage

(10-12)

16

## Real power =

###
Calculation

(10-12)

17

## Utility companies charge for power in ________.

###
Killowatt hours (kwh)

(10-13)

18

## One kwh is equal to _________

###
1000 watt-hours

(10-13)

19

##
Test question: 1850 watt hours x 24 hours a day x 30 days = 1332.00

1332 x 0.075 = ________

###
$99 month

(10-13)

20

## 1 watt = ________ btu/hr

###
3.413 btu/hr

(10-14)

21

## watts x 3.413 =

###
heat dissipation in BTU

(test)

(10-14)

22

## Formula for tons of A/C:

###
# of watts x 3.413/12000= (answer) tons of A/C

(test)

(10-14)

23

## BTU/12000 =

###
tons of air conditioning

(10-14)

24

## AWG accepted =

###
Worldwide

(10-16)

25

## Sizes in the AWG system represent

###
# of steps

(test)

(10-16)

26

## AWG smaller #'s =

###
larger wires

(10-16)

27

## AWG larger #'s =

###
smaller wires

(10-16)

28

##
AWG smallest size = ______

largest size = ______

###
-36 awg

-4/0 = 460 mil

(10-16)

29

## Circular mills =

###
4/0 & above

(10-17)

30

## Swell =

###
increase, 05. cycle - 1 minute

(10-20)

31