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WorksheetsModule 1 Unit C
Total questions: 21
Worksheet time: 7mins
Name
Class
Date
1.
One method of more efficient coal burning is to create more surface area than normally occurs in raw coal. A common method of increasing the surface area is called __________
a)
cracking
b)
pulverizing
c)
fracturing
2.
Sufficient heat to raise the fuel/air temperature of the fuel to reach ignition temperature is provided by the ________________.
a)
Torches
b)
flame throwers
c)
Ignitors
3.
The ash remaining from burned coal that is collected in the ash hopper is called slag or _____.
a)
top ash
b)
soot
c)
bottom ash
4.
The ___________________ are placed directly in the walls of the furnace to absorb the greatest possible amount of heat in the boiler.
a)
fire hoses
b)
Waterwall tubes
c)
insulating pads
5.
In order to put dry steam into the turbine; the steam must be heated to a higher temperature than that which was generated in the waterwalls. The most common method of heating is using a device known as a ______________.
a)
thermal inductor
b)
baking oven
c)
Superheater
6.
The _____________ is a heater that reheats the steam after it has been through part of the turbine.
a)
Superheater
b)
Reheater
c)
thermal chamber
7.
To reuse the exhaust steam a large hollow box is attached to the exhaust opening of the turbine. This box is referred to as a ____________through which relatively cool water is pumped.
a)
heat exchanger
b)
heat pump
c)
Condenser
8.
In an operating plant, water is lost through leakage and other losses. Since the water level must remain fairly constant additional water has to be added to the system. This water is referred to as__________________.
a)
liquid substitution
b)
Flooding
c)
makeup water
9.
Most of the furnace heat is absorbed by the boiler tubes, superheater and reheaters. However, some of the remaining heat that would otherwise go out the stack is left to heat the feed water. The economy of the system is increased by adding a bank of tubes to preheat the water. This bank of tubes is called the______________.
a)
economizer
b)
heat regulator
c)
water heater
10.
The power plant main __________________ produce electrical power.
a)
Transformers
b)
Generators
c)
Switchyard
11.
_____________ is the number of electrons in motion in an electrical circuit.
a)
Amperage or current
b)
voltage
c)
wattage
12.
The “pressure” pushing the electrons along is called the ___________
a)
Amperage or current
b)
voltage
c)
wattage
13.
A ________________ is a specially designed conductor having low resistance.
a)
insulator
b)
resistor
c)
bus
14.
______________ are materials such as copper and aluminum that allow current to flow freely through them.
a)
buses
b)
resistors
c)
conductors
15.
Insulators such as ______________and ______________ are good materials that do not allow electrical current to flow through them.
a)
glass and fiber glass
b)
copper and aluminum
c)
wood and titanium
16.
_____________have low resistances and ________________ have very high resistances.
a)
conductors and insulators
b)
resistors and capacitors
c)
diodes and capacitors
17.
A____________ is an electrical device by which alternating current of one voltage is changed to another voltage.
a)
Capacitor
b)
Transformer
c)
Resistor
18.
The transmission system operates at high voltages in ranges from ____________ to __________ volts.
a)
240 to 1000
b)
138,000 to 1,000,000
c)
1000 to 5000
19.
Forcing current through the resistance in a conductor makes _____________
a)
amperage or current
b)
heat
c)
electricity
20.
If there are fewer turns in the primary winding than in the secondary winding, the transformer is said to be a _____________ transformer.
a)
step-down
b)
step-up
c)
powerful
21.
If you are at home and your lights flash off and on two or three times that could be an indication that the _____________ is trying to protect the wires or lines.
a)
distribution circuit breaker
b)
distribution circuit regulator
c)
distribution transformer
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