1 Answer:
The greenhouse effect occurs when
a. cooling towers malfunction.
b. radiated heat from the Earth is absorbed by the atmosphere.
c. steam heating systems are used.
d. ultraviolet light is absorbed by the atmosphere.
2 Answer:
When steam condenses
a. it changes from the gas phase to the liquid phase.
b. it gives off heat.
c. molecules move closer together.
d. all of the above occur.
3 Answer:
In a solar heating system, heat is transferred to water in a storage
tank by means of a
a. cooling tower.
b. solar collector.
c. heat exchanger.
d. radiator.
4 Answer:
In a radiant electric system, heat is produced from
a. electric resistance in cables or wires.
b. thermostats.
c. heat pumps.
d. packed fiberglass.
5 Answer:
Weatherstripping prevents heat loss by
a. lessening evaporation.
b. reducing convection and conduction.
c. preventing condensation.
d. increasing radiation.
6 Answer:
Which of the following is not part of a cooling system?
a. storage tank
b. refrigerant
c. compressor
d. cooling tower
7 Answer:
In which stroke of a four-stroke engine does a spark plug ignite the
gas?
a. intake
b. compression
c. power
d. exhaust
8 Answer:
A diesel engine
a. uses only air during the intake stroke.
b. is an external-combustion engine.
c. uses a spark plug to ignite fuel.
d. uses Freon.
9 Answer:
A cooling tower
a. is controlled by a thermostat.
b. cools water as it flows through pipes.
c. cools water through insulation.
d. causes thermal pollution.
10 Answer:
In passive solar heating,
a. buildings have pipes to circulate hot water.
b. a heat exchanger is needed.
c. buildings are heated directly by the sun.
d. a solar collector absorbs sunlight.