12. The demand factor is used to
c. 3 3W 208V
determine the amount of power that
d. 3 4W 120/208V
must actually be supplied to a
What then is
the generator factor used for?
choice exercises 9 and 10 to show what
a. it is the same as the demand
b. determining the amount of power
that must actually be supplied
to a group of buildings
increased or decreased by means of
c. taking into account that all
connected loads in a building
distance of DC power is limited.
are not used simultaneously
Why, then, might you need a DC
generator in a TO?
factor cannot be determined
a. short distance transmission of
b. production of 400 cycle current
requirements for a section of your
for radar equipment
c. backup for AC generators
buildings together and determine
the power that must be supplied to
These buildings are: (1) a
50-man, 20' x 100' barracks; (2) a
10. The important characteristics
recreation hall 20' x 100'; (3) a
of a generator are its capacity or
15-ton 401 x 52' ice plant; (4) a
kilowatt (KW) rating, the voltage
60' x 140' machine shop.
the load you must be able to
and whether it is single or three
required generator capacity)?
characteristics determines the size
a. 104.2 KVA
c. 114.6 KVA
of the generator's driving motor?
b. 107.8 KVA
d. 129.8 KVA
exercises 14 through 17 enable you to
d. number of phases
principles of determining generator
selection, availability, and location.
exercises 11 through 13 deal with load
estimation for electric distribution
14. The following generators are
available to you: three 100KW;
three 45KW; two 60KW; one 30KW; one
11. You are assigned the project
You have determined the
required generator capacity for a
requirements for a section of a
portion of your installation to be
Which of the following
buildings which must be served is a
2,500 man capacity laundry.
would you expect the demand load of
a. 2-60KW; 1-30KW
this laundry to be?
a. 29.1 KVA
c. 36.1 KVA
b. 32.5 KVA
d. 39.2 KVA