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6.3 And 6.4
Test Description: Power in Electrical and Thermal Systems
Instructions: Answer all questions to get your test result.
1) Electrical power is the rate at which what is done
A
energy
B
electrical work
C
forces
D
pressure
2) Which of the following is not a formula for electrical power?
A
V*q/t
B
voltage squared times resistance
C
work/time
D
current squared times resistance
3) If you are given a problem with power and voltage, what would you do to find current
A
power divided by voltage
B
voltage plus power
C
power times voltage
D
voltage divided by power
4) If you are given a current of 3 amps and a voltage of 2 volts, what is your power?
A
6 watts
B
6 hp
C
6 meters
D
6 lbs/sec
5) How much current flows through a 600 W toaster in use on a 120 V circuit?
A
72000 A
B
480 A
C
0.2 A
D
5 A
6) The power company measures your energy usage in what units?
A
V*A
B
watts
C
Wh
D
kWh
7) What does q stand for in an equation?
A
heat
B
quantity
C
quality
D
charge
8) One watt = ?
A
3.413 Btu/hr
B
1 Btu/hr
C
2545 Btu/hr
D
14.3 Btu/hr
9) 1 hp =
A
1 cal/sec
B
178.2 cal/sec
C
0.324 cal/sec
D
0.239 cal/sec
10) 1 hp =
A
746 watts
B
0.293 watts
C
550 watts
D
1 watt
*select an answer for all questions
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