SLTC REVISION EXAM TEST 2025/2026 QUESTIONS AND
SOLUTION RATED A+
✔✔Doubling the length of the ground rod into the earth will typically reduce the ground
resistance by _______ while doubling its diameter only reduces resistance by ______ -
✔✔40% and 10%
✔✔What are the four important steps to properly grounding lines - ✔✔1.) Identify/ Job
Breifing
2.) Isolate
3.) Test
4.) Ground the section of the line has been isolated and tested
✔✔What does OSHA require before each job? - ✔✔A Job Briefing
✔✔What should you put on the lines when you are down somewhere else fixing
something - ✔✔tags or blocking devices
✔✔What are the two most commonly used clamps for grounding? - ✔✔C-Clamp or
Snap on (Duckbill) clamps
✔✔The IEEE guide for protective grounding says that the mechanical force of a jumper
with a fault current range of ________ to _________ can reach what? - ✔✔30Kva to
60Kva and can reach 450 foot pounds
✔✔Personal Protective grounding cables must never be smaller than what? - ✔✔#2
AWG ccopper
✔✔What are the four main ground sources commonly available when working on the
distribution system? - ✔✔1.) The system neautral
2.) Driven ground rods
3.) Temporary ground rods
4.) Anchor rods
✔✔How many steps should be used when checking the continuity of a transformer? -
✔✔There are 6 steps
✔✔What step will show continuity of a transformer - ✔✔1.) H1 to H2
2.) X2 to X1
3.) X2 to X3
✔✔What is something we need to know on a transformer plate? - ✔✔The schematic
✔✔What kind of slings do you need to lift transformers? - ✔✔Nylon slings
, ✔✔What is it called when the transformer can operate at 200% for a short peirod of
time? - ✔✔Diversity Factor
✔✔Before an overhead transformer is lifted or installed it should be what? - ✔✔It should
be bussed out on the ground
✔✔Where should transformers be lifted from? - ✔✔From the manufacturers lifting points
✔✔The National Electric Safety Code requires that all systems less than ____________
volts be grounded - ✔✔750
✔✔The tank ground is required for what? - ✔✔For safety or personnel, both linemen
and the public
✔✔The ground connection on the transformer should be what - ✔✔First to make and
last to break
✔✔What should ground rod resistance should be measured with? - ✔✔A Megohmmeter
(megger)
✔✔Grounds shouldn't exceed what? - ✔✔25 Ohms
✔✔Ground rods should be what diameter? - ✔✔5/8 or 3/8 inches in diameter
✔✔The fused cutout protects the transformer against what? - ✔✔Fault current
✔✔What does a fused cutout give us? - ✔✔It gives us isolation and a visual isolation
with an air gap
✔✔Who are the leading manufacturers of fuse-links? - ✔✔Kearney
✔✔What are the most two common types of fuse-links? - ✔✔K (Kwick) and T (Tardy)
✔✔What does the K (Kwick) fuse-link mean? - ✔✔It operates extremely fast
✔✔What does the T (Tardy) link mean? - ✔✔It operates slowly, allowing more time for
the fault to clear before melting
✔✔What is riser wire made of? - ✔✔#6 or #4 bare or coated copper
✔✔What's another name for primary? - ✔✔Source
SOLUTION RATED A+
✔✔Doubling the length of the ground rod into the earth will typically reduce the ground
resistance by _______ while doubling its diameter only reduces resistance by ______ -
✔✔40% and 10%
✔✔What are the four important steps to properly grounding lines - ✔✔1.) Identify/ Job
Breifing
2.) Isolate
3.) Test
4.) Ground the section of the line has been isolated and tested
✔✔What does OSHA require before each job? - ✔✔A Job Briefing
✔✔What should you put on the lines when you are down somewhere else fixing
something - ✔✔tags or blocking devices
✔✔What are the two most commonly used clamps for grounding? - ✔✔C-Clamp or
Snap on (Duckbill) clamps
✔✔The IEEE guide for protective grounding says that the mechanical force of a jumper
with a fault current range of ________ to _________ can reach what? - ✔✔30Kva to
60Kva and can reach 450 foot pounds
✔✔Personal Protective grounding cables must never be smaller than what? - ✔✔#2
AWG ccopper
✔✔What are the four main ground sources commonly available when working on the
distribution system? - ✔✔1.) The system neautral
2.) Driven ground rods
3.) Temporary ground rods
4.) Anchor rods
✔✔How many steps should be used when checking the continuity of a transformer? -
✔✔There are 6 steps
✔✔What step will show continuity of a transformer - ✔✔1.) H1 to H2
2.) X2 to X1
3.) X2 to X3
✔✔What is something we need to know on a transformer plate? - ✔✔The schematic
✔✔What kind of slings do you need to lift transformers? - ✔✔Nylon slings
, ✔✔What is it called when the transformer can operate at 200% for a short peirod of
time? - ✔✔Diversity Factor
✔✔Before an overhead transformer is lifted or installed it should be what? - ✔✔It should
be bussed out on the ground
✔✔Where should transformers be lifted from? - ✔✔From the manufacturers lifting points
✔✔The National Electric Safety Code requires that all systems less than ____________
volts be grounded - ✔✔750
✔✔The tank ground is required for what? - ✔✔For safety or personnel, both linemen
and the public
✔✔The ground connection on the transformer should be what - ✔✔First to make and
last to break
✔✔What should ground rod resistance should be measured with? - ✔✔A Megohmmeter
(megger)
✔✔Grounds shouldn't exceed what? - ✔✔25 Ohms
✔✔Ground rods should be what diameter? - ✔✔5/8 or 3/8 inches in diameter
✔✔The fused cutout protects the transformer against what? - ✔✔Fault current
✔✔What does a fused cutout give us? - ✔✔It gives us isolation and a visual isolation
with an air gap
✔✔Who are the leading manufacturers of fuse-links? - ✔✔Kearney
✔✔What are the most two common types of fuse-links? - ✔✔K (Kwick) and T (Tardy)
✔✔What does the K (Kwick) fuse-link mean? - ✔✔It operates extremely fast
✔✔What does the T (Tardy) link mean? - ✔✔It operates slowly, allowing more time for
the fault to clear before melting
✔✔What is riser wire made of? - ✔✔#6 or #4 bare or coated copper
✔✔What's another name for primary? - ✔✔Source
