1-The power generated by photovoltaic cells in an array ________________. is alt

ID: 367319 • Letter: 1

Question

1-The power generated by photovoltaic cells in an array ________________.

is alternating current and can be directly used by the power company

is direct current power

can be increased by having the array track the movement of the sun

both B and

2-When water vapor in a boiler’s stack gas gives up latent heat to the water returning to the boiler, the boiler is said to be a ________________.

non-condensing boiler

condensing boiler

fire tube boiler

water tube boiler

3-Ice storage systems _______________________________.

can reduce chiller tonnage by 40 to 50 percent

don’t save energy directly, but they improve the efficiency of the power utility’s delivery of power

shift electric load to off-peak periods

all of the above

is alternating current and can be directly used by the power company

is direct current power

can be increased by having the array track the movement of the sun

both B and

1-The power generated by photovoltaic cells in an array __

B - is direct current power

Explanation - Photovoltaic cell generates dc current in array.

2-When water vapor in a boiler’s stack gas gives up latent heat to the water returning to the boiler, the boiler is said to be a __

B- condensing boiler

Explanation - Condensing boiler are closed type of boilers which regenerates heat by returning gases.

3-Ice storage systems ____

D - all of the above

Explanation - Ice storage system are a more efficient way to improve air conditioning system and have all these qualities.

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