CHEMICAL REACTION ENGINEERING QUIZ

If it takes 400 ms to use 12,000 J of energy, the power is

30 W

300 kW

30 kW

3 W

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YOUR ANSWER : ?

At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

252 kWh

1.286 kWh

535 kWh

12.85 kWh

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How many watt-hours represent 65 W used for 18 h?

1,170 Wh

117,000 Wh

11,700 Wh

11.7 Wh

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A 220 resistor dissipates 3 W. The voltage is

2.5 V

257 V

25.7 V

73.3 V

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When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is

reversed

shorted

overheated

open

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A 33 half-watt resistor and a 330 half-watt resistor are connected across a 12 V source. Which one(s) will overheat?

33

neither resistor

330

both resistors

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In 40 kW, there are

40,000 W

400 W

5,000 W

0.4 mW

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A 75 load uses 2 W of power. The output voltage of the power supply is approximately

120 V

6 V

12 V

1.2 V

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A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt-hours of energy does it consume?

20.16 kWh

8.4 kWh

201.6 kWh

2.01 kWh

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YOUR ANSWER : ?

A half-watt is equal to how many milliwatts?

500 mW

5 mW

50 mW

5,000 mW

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