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JOURNEYMAN LINEMAN EXAM AND
PRACTICE EXAM NEWEST 2024-2025 ACTUAL
EXAM COMPLETE 200 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
JOURNEYMAN LINEMAN EXAM
What is the smallest size of wire allowed on grounding equipment? - CORRECT ANSWER -#2 Copper
What does a PT sense? - CORRECT ANSWER -Voltage
What does a CT sense? - CORRECT ANSWER -Amps
What is the worst things for a transformer? - CORRECT ANSWER-Heat, lightening.
Where are the tap changers located? - CORRECT ANSWER -On the primary coil
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How does the load split on delta transformer bank? - CORRECT ANSWER-Outside transformers carry 1/3 of the single phase load, center Transformer carries 2/3's.Each transformer carries 1/3 of the 3-Phase load. (If there is a larger Xfmr it can only match smaller Xfmr in 3-phase capacity.)
On a single bushing transformer (CSP) where does the other end of the primary coil go? - CORRECT ANSWER -To the tank ground
What is an internal fuse? - CORRECT ANSWER -It is the same thing as a cutout fuse just inside the H1 bushing.
What's the difference between "240/120" and "120/240" on a transformer name plate? - CORRECT ANSWER -240/120 is two separate coils 120/240 is one coil
What does a bayonet fuse on a padmount transformer de- energize? - CORRECT ANSWER -The primary winding of the transformer (But the transformer bus bar between H1A and H1B is still energized)
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What does a CT's do to the amps? - CORRECT ANSWER -CT's reduces the amps to 5
What do PT's do to the voltage? - CORRECT ANSWER -PT's reduce voltage to 120v
What is copper loss? - CORRECT ANSWER -Copper loss is resistance (in the wire)
What non-flammable gas is put into equipment? - CORRECT ANSWER-SF6 Gas (Sulfur Hexafluoride)
How do you calculate load on an open transformer bank? - CORRECT ANSWER -(Load X .57 )= 3-phase load
What are regulators? - CORRECT ANSWER -A regulator is a autotransformer (The primary winding is connected across the line, and the secondary winding is connected in series with the load.)
How to find taps? - CORRECT ANSWER -Divide Actual/desired. Example if actual is 120v, voltage desired 110v.
120/110 = 1.09 (109%) 3 / 4
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How do you find KWH consumed? - CORRECT ANSWER -
Current Transformer rating 30:5
Potential Transformer rating 7200:120
(30/5=6, 7200/120=60, 60X6=360)
Multiply the dial reading by 360
What is an auto transformer? - CORRECT ANSWER -It is one coil taped in the center used in Transmisson
Low power factor is caused by _?_ - CORRECT ANSWER -The current lagging the voltage and can be fixed by installing capacitors.
Rigging How do you find tension on a fall line? - CORRECT ANSWER - Total weight + friction loss = Total /Mechanical Advantage (every shive on a block = -10% of total weight.)
Rigging How do you find load factor? - CORRECT ANSWER -Length of sling / height of sling= load factor
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