Engineering – study material
True/false: Nuclear fusion is a renewable source of energy - ANS ✔✔TRUE:
Nuclear fusion uses hydrogen isotopes and hydrogen isotopes can come from water. There is plenty of
water on this planet to provide energy for literally millions of years. This makes nuclear fusion a
renewable source of energy.
One calorie is defined as the amount of energy that is required to raise the temperature of _____.
A. 1 lb of water by 1ºF.
B. 1 g of water by 1ºC.
C. 1 lb of water by 1ºC.
D. 1 gal of water by 1ºC. - ANS ✔✔B. 1 g of water by 1ºC.
Energy can be converted into which of the following:
A. Work
B. Heat
C. Radiation
D. All of the above
E. None of the above - ANS ✔✔D. All of the above
Which one of the following is a unit of power?
Joule
Btu/h
Watt/hour
Quad - ANS ✔✔BTU/h
One BTU of energy is enough to do what?
Heat your room to a comfortable temperature.
, Heat one pound of water by one degree Fahrenheit.
Heat one gram of water by one degree Celsius.
Heat one gallon of water by one degree Fahrenheit. - ANS ✔✔Head one pound of water by one
degree Fahrenheit
A 100 watt incandescent light bulb is operated for 120 hours, and a 15 watt fluorescent light bulb is
operated for the same period of time. At 10 cents per kWh, what is the cost savings of the fluorescent
bulb? - ANS ✔✔$1.02
Energy = Power x duration,
100W x 120h = 12,000Wh = 12 kWh 15W x 120h =1,800 Wh = 1.8 kWh
Energy savings is the difference (12-1.8) kWh = 10.2 kWh; at the rate of 10 cents per kWh this amounts
to $1.02
True/False: Energy can be converted from one form to another. - ANS ✔✔True!
True/False: A BTU has more energy than a calorie. - ANS ✔✔True!
The energy possessed by a ball thrown by a quarterback is of the form:
Mechanical
Radiation
Chemical
Thermal - ANS ✔✔Mechanical
Energy from the Sun is coming to the earth in the form of:
Radiation
Mechanical
Chemical
Nuclear - ANS ✔✔Radiation