Unit 3-4 Lesson 1
A current carrying line, when located inside the substation yard, is called a ? . a. bus b. current grid c. grounding circuit d. source feeder
A
A substation ground grid is connected to the substation fence and is extended about ? outside the fence. a. 3' b. 6' c. 9' d. 12'
A
In a substation, a recloser is used to protect a ? feeder. a. distribution b. sub-transmission c. substation control d. transmission
A
The type of substation used to change AC to DC and back again is a ? substation. a. converter b. municipal c. sub-transmission d. transmission
A
The substation which houses the source circuit breakers for the outgoing distribution feeders is the ? substation. a. converter b. distribution c. industrial d. low-profile
B
A distribution substation will typically ? the incoming voltage. a. convert b. invert c. step down d. step up
C
Substations without transformers are referred to as ? . a. bus stations b. radials c. switchyards d. transfer centers
C
The ? circuit breaker has been the most common type found in substations. a. electronic b. gas c. oil d. pneumatic
C
There are ? pieces of equipment used in a substation to adjust the voltage. a. 2 b. 3 c. 4 d. 6
C
Electricity is transmitted at high voltages to substations ? . a. because high voltages are easier to work with b. because high voltages shed ice better c. to eliminate the need for larger wire d. to reduce the losses
D
Of the types of substations that are downstream from a generating station, the one closest to the generating station would be a ? substation. a. converter b. municipal c. step-down transmission d. step-up transmission
D
The voltage supplied by substations found near end users is normally in the 2.4 kV to ? range. a. 7.2 kV b. 14.4 kV c. 24.9 kV d. 34.5 kV
D
A converter is not one of the types of substations that are downstream from a generating station. Select one: True False
False
A rural substation is normally more complex in construction than an urban substation. Select one: True False
False
Capacitors used in substations do not help adjust the voltage. Select one: True False
False
SF6 gas is not used as an arc-quenching medium in circuit breakers because it is highly toxic in its normal state. Select one: True False
False
A gas-insulated substation can be constructed completely underground. Select one: True False
True
A substation yard is one large equipotential zone. Select one: True False
True
Electrical power is transmitted over long distances at low currents and high voltages. Select one: True False
True
