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Energy Engineering Interview Test
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Avg score: 18% • Most missed: “If you used 400 W of power for 30 h, you have used”
Energy Engineering Interview Test
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25 Questions

1. A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is
2. A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is
3. How many watt-hours represent 65 W used for 18 h?
4. A 3.3 k resistor dissipates 0.25 W. The current is
5. In 40 kW, there are
6. A half-watt is equal to how many milliwatts?
7. A half-watt is equal to how many milliwatts?
8. If it takes 400 ms to use 12,000 J of energy, the power is
9. For 12 V and 40 mA, the power is
10. If you used 600 W of power for 60 h, you have used
11. A 75 load uses 2 W of power. The output voltage of the power supply is approximately
12. Three hundred joules of energy are consumed in 15 s. The power is
13. At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?
14. How many watt-hours represent 65 W used for 18 h?
15. A 6 V battery is connected to a 300 load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?
16. A 3.3 k resistor dissipates 0.25 W. The current is
17. If you used 400 W of power for 30 h, you have used
18. A 68 resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is
19. A 68 resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is
20. The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be
21. A 120 resistor must carry a maximum current of 25 mA. Its rating should be at least
22. A 120 resistor must carry a maximum current of 25 mA. Its rating should be at least
23. For 12 V and 40 mA, the power is
24. In 0.025 W, there are
25. The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be

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