Journeyman lineman TEST Latest Update 2024- 2025 Actual Exam with Questions and 100% Verified Correct Answers Guaranteed A+ Approved by the Professor
A 10 KVA transformer is rated 7200 volts primary and 120 volts secondary. What is full
load current? - CORRECT ANSWER: 10,000/120=83.3 primary
7200/120= 6
60 to 1 ratio 83.3/60= 1.38 secondary
A conductor is pulled to what tension? - CORRECT ANSWER: 50%
A three phase transformer voltage is 66000/12470Y. Full load on high side is 13.1 amps.
What are the amps on secondary?
What is the KVA capacity? - CORRECT ANSWER: 66000/12470=5.29
5.29x13.1=69.29 or
69.3amps secondary
12470x69.3x1.732
-------------------
1000
=14.967
Or 15KVA capacity
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- Define load factor.
- Define KVA
C. Define KW - CORRECT ANSWER: A. Ratio of average load to peak load
- Apparant power
- True power
Amps x volts/1000
Amps x volts xPF/1000
At what angle does a lifting sling have the same weight stress as the load being lifted? -
CORRECT ANSWER: 30*
At what angle is the weight stress reduced approximately 1/2 of the load being lifted? -
CORRECT ANSWER: 60*
Can transformers of different polarity be parallel?
How do you test polarity? - CORRECT ANSWER: Yes
H1. H2
/ VM \
X1. X2
High side fuses are ordinarily from 200 to 300% of full load current of transformers, if short circuit capacity will permit. What size fuse will be needed for a 66 KV, 1500KVA at
300% - CORRECT ANSWER: 66000/1.732=38106
1500/3=500 KVA. or
500,000 KV
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