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