LINEMAN APPRENTICE TEST NEWEST
ACTUAL EXAM WITH COMPLETE
QUESTIONS AND DETAILED ANSWERS
GRADED A | BRAND NEW!!!
The semiconductor blocks in a lightening arrestor are made
using what type of material?
Zinc Oxide Material
The most energy efficient transformer cores are constructed
with _______ or _________.
Low loss cold rolled silicon strips, amorphous steel alloy strips.
In transformers how much more efficient are amorphous metal
cores than laminated steel cores?
60%
,True or False - DC circuits have no lead or lag in current versus
voltage.
True
True or false - When free electrons in a conductor give up their
random movement and flow in one direction, it is called current
of simple current.
True
DC cable insulation must be thick enough to provide a safety
factor of ______ to ______.
3 to 5
True or False - The primary or high voltage side of a transformer
(OH/UG) has a high electric pressure and the current is large.
The secondary or low side has a low pressure and the current is
small.
False (High side has high pressure and low current.
The low side has low pressure and high current)
What is the breaking strength of 5/16 utility grade guy wire?
6,000 lbs
________ are used to protect the electrical system from faults
in such equipment as potential transformers or power
transformers.
High voltage fuses
What is the standard polarity of a 14.4 transformer that is less
than 200 kVA?
Subtractive
, Explain the properties that describe a good insulator.
An object with few free electrons
A recloser can operate a predetermined number of times
_________ to ________ and "locks out".
1 to 4
The lengths of sag sections are limited by deadends, angle
structures, and terrain. What is the max length of a sag section?
4.5 miles (weather conditions including temp and wind
velocity must be taken into consideration during this procees.
Also, dynamometers can be used to check line tension).
Secondary terminals on a transformer in order X3, X2, X1 from
left to right is ________ polarity.
Additive
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