SLTC FINAL TEST LATEST
1. ____________ determines how many watts of power that a
transformer can deliver.
KVA
2. Prior to installation, lineman always refer to the nameplate for
what information?
1. Primary/Secondary Voltage ratings2. S/N3. Manufacturer4. Polarity5.
Schematic6. Weight (WT)7. KVA
3. Should the tank of every transformer be grounded?
All systems below 750 volts should be
4. Are transformer tank lids unremovable?
Yes
5. Are PCB's still currently manufactured in the United States?
No
6. If the transformer is to be reworked, does the serial number stay
with the tank or the core?
core
7. Transformers will handle overloads up to _____ of their rated
KVA capacity for a short period of time.
200 %
8. What is the fluid in a transformer used for?
END OF
PAGE
1
, SLTC FINAL TEST LATEST
cooling/insulating
9. _______ is the voltage needed to operate the load.
Secondary voltage
10. _______ limits the surge voltages on equipment.
Arrestors
11. _______ are synthetic organic chemicals.
PCB
12. _______ is shown as %Z on the nameplate.
Impendence
13. _______ is the voltage from the source.
Primary
14. _______ is the capacity rating of the transformer.
KVA
15. What letters are used to indicate the primary and secondary
windings?
H and X
16. Using a voltmeter or kick tester, how many steps should be used
to check continuity of a transformer?
6
END OF
PAGE
2
, SLTC FINAL TEST LATEST
17. On an underground transformer nameplate, is the primary coil
voltage rating printed in reverse order?
YES
18. To avoid short-time overloads, is it preferred to oversize the
transformer?
NO
19. Diversity Factor refers to ____________________.
Percentage of time that a load is at a MAXIMUM loading, while
connected and switched on.
20. When mounting a transformer on the pole, are nylon slings
preferred for lifting?
yes
21. The NESC requires that all systems less than ________ volts be
grounded.
750 volts
22. On a distribution pole, the pole ground is typically what size?
#2
23. The NESC states that the resistance of a driven ground rod shall
not exceed__________.
25 ohms
24. The NESC requires that a ground rod be at least how long?
END OF
PAGE
3
, SLTC FINAL TEST LATEST
8ft
25. If you are using a single bushing transformer, is a case ground
required?
Yes
26. The function(s) of the transformer fuse is to_________________.
1. Protects transformer against Current Overloads and Short Circuits.2.
Clear a faulted transformer from the line.3. Indicates where problem is
when troubleshooting.
27. Using the example of a 5 amp type X fuse; the X refers to?
The difference in TIME CURRENT(The rate at which the fuse will
melt)
28. When making up a transformer, the first connection should
always be________.
ground
29. After installing a new transformer, always _____________
before connecting the customer's load.
test
30. When doing a secondary delta connection, what two bushings do
you tie together to get a phase?
x1/x3
31. Identify and explain all data listed on nameplate.
END OF
PAGE
4
1. ____________ determines how many watts of power that a
transformer can deliver.
KVA
2. Prior to installation, lineman always refer to the nameplate for
what information?
1. Primary/Secondary Voltage ratings2. S/N3. Manufacturer4. Polarity5.
Schematic6. Weight (WT)7. KVA
3. Should the tank of every transformer be grounded?
All systems below 750 volts should be
4. Are transformer tank lids unremovable?
Yes
5. Are PCB's still currently manufactured in the United States?
No
6. If the transformer is to be reworked, does the serial number stay
with the tank or the core?
core
7. Transformers will handle overloads up to _____ of their rated
KVA capacity for a short period of time.
200 %
8. What is the fluid in a transformer used for?
END OF
PAGE
1
, SLTC FINAL TEST LATEST
cooling/insulating
9. _______ is the voltage needed to operate the load.
Secondary voltage
10. _______ limits the surge voltages on equipment.
Arrestors
11. _______ are synthetic organic chemicals.
PCB
12. _______ is shown as %Z on the nameplate.
Impendence
13. _______ is the voltage from the source.
Primary
14. _______ is the capacity rating of the transformer.
KVA
15. What letters are used to indicate the primary and secondary
windings?
H and X
16. Using a voltmeter or kick tester, how many steps should be used
to check continuity of a transformer?
6
END OF
PAGE
2
, SLTC FINAL TEST LATEST
17. On an underground transformer nameplate, is the primary coil
voltage rating printed in reverse order?
YES
18. To avoid short-time overloads, is it preferred to oversize the
transformer?
NO
19. Diversity Factor refers to ____________________.
Percentage of time that a load is at a MAXIMUM loading, while
connected and switched on.
20. When mounting a transformer on the pole, are nylon slings
preferred for lifting?
yes
21. The NESC requires that all systems less than ________ volts be
grounded.
750 volts
22. On a distribution pole, the pole ground is typically what size?
#2
23. The NESC states that the resistance of a driven ground rod shall
not exceed__________.
25 ohms
24. The NESC requires that a ground rod be at least how long?
END OF
PAGE
3
, SLTC FINAL TEST LATEST
8ft
25. If you are using a single bushing transformer, is a case ground
required?
Yes
26. The function(s) of the transformer fuse is to_________________.
1. Protects transformer against Current Overloads and Short Circuits.2.
Clear a faulted transformer from the line.3. Indicates where problem is
when troubleshooting.
27. Using the example of a 5 amp type X fuse; the X refers to?
The difference in TIME CURRENT(The rate at which the fuse will
melt)
28. When making up a transformer, the first connection should
always be________.
ground
29. After installing a new transformer, always _____________
before connecting the customer's load.
test
30. When doing a secondary delta connection, what two bushings do
you tie together to get a phase?
x1/x3
31. Identify and explain all data listed on nameplate.
END OF
PAGE
4
