A. Choose the letter of the best answer.
1. In which of the following units is electrical consumption measured by electric companies for our household consumption in our homes?
a. Kilowatt
b. Volt
c. Megawatt
d. Kilowatt hour
2. In power stations generating electricity, power is measured in _________.
a. Joule
b. Kilojoule
c. Kilowatt
d. Megawatt
3. Why do power stations generate AC, and not DC?
a. It is easier to generate, safer and more economical to transmit AC than DC.
b. Transformers work with AC.
c. AC is used in mobile devices and gadgets.
d. AC is more efficient and economical.
4. Transformers are used to raise the voltage along substations and lower it for residential consumption. What kind of transformers is used to raise the voltage?
a. step-up
b. step down
c. neither of the two
d. both
5. Shayne turned on a lamp switch in her room. Which of the following is the correct path of electrical power that can be traced back to the source?
a. distribution substations - power plant - transmission substations - residences
b. power plant - transmission substations - distribution substations - residences
c. transmission substations – residences- distribution substations - power plant
d. residences- distribution substations - power plant- transmission substations
6. What energy transformation takes place in a generator?
a. Heat to mechanical
b. Mechanical to chemical
c. Mechanical to electrical
d. Electrical to mechanical
7. A device that changes thermal energy into mechanical work is ______.
a. Heat engine
b. Heat pump
c. both
d. neither of the two
8. If a 100 W light bulb is lit for 8 hours each day for 20 days in a month. How many kilowatt-hours will the bulb consume?
a. 16000
b. 1600
c. 160
d. 16
9. Electricity produced from generators driven by turbines that convert the potential energy of falling or fast-flowing water into mechanical energy.
a. Solar power
b. Wind power
c. Hydroelectric power
d. Geothermal power
10. Type of power plant that make use of the combustion of coal in order to generate electricity.
a. Solar power plant
b. Coal-fired power plant
c. Hydroelectric power plant
d. Geothermal power plant
B. Can you think of some ways on how we can save on electrical energy
consumption?
List down at least 3 energy-saving tips for each appliance:
a. Washing machine
b. Refrigerator
c. Clothes Iron
d. Lights and lamps
e. Electric Fan
f. Television
Share
Answer:
A.
1. A
2. B
3. A
4. D
5. C
7. B
8. A
9. D
10. B
B.
1. E
2.D
3. F
Explanation:
I HOPE IT'S HELP