Examination Practice Questions And

Illinois Cable Splicer Certification Examination Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of a cable splice?
• To strengthen the cable’s insulation
• To permanently join two cable ends
• To reduce cable impedance
• To ground the conductor

Rationale: A splice connects two cable ends to maintain electrical

continuity and insulation integrity.

• What is the first step before beginning any splicing job on energized

cables? 1 / 4

• Inspecting splice materials
• Verifying voltage drop
• De-energizing and grounding the cable
• Cleaning the sheath

Rationale: De-energizing and grounding ensures worker safety and

prevents electrical shock.

• Which tool is most commonly used for removing cable insulation?
• Hacksaw
• Cable stripping tool
• Pipe cutter
• Screwdriver

Rationale: Cable stripping tools are designed to remove insulation cleanly

without conductor damage.

• Which splice type is most common for low-voltage cables?
• Compression splice
• Western Union splice
• Pothead splice
• Shielded splice

Rationale: The Western Union splice offers strong mechanical integrity for

low-voltage lines.

• What is the purpose of using heat-shrink tubing on a splice? 2 / 4

• To lubricate the joint
• To seal and insulate the splice area
• To cut the wire
• To attach the connector

Rationale: Heat-shrink tubing provides moisture protection and insulation

restoration.

• Which PPE is mandatory during high-voltage splicing?
• Cotton gloves
• Leather boots
• Earplugs
• Insulating rubber gloves and sleeves

Rationale: Insulating gloves protect workers from potential electrical

contact.

• What does a continuity test check?
• Voltage rating
• Whether electrical current can flow through the splice
• Insulation resistance
• Shielding effectiveness

Rationale: Continuity testing verifies the electrical path is unbroken after

splicing.

• What is the main purpose of cable shielding? 3 / 4

• Increasing voltage
• Providing lubrication
• Reducing electromagnetic interference
• Reducing weight

Rationale: Shielding prevents interference and protects signal integrity.

• What type of tape is used to restore semi-conductive layers?
• Vinyl tape
• Semi-conductive tape
• Rubber tape
• Filler tape

Rationale: Semi-conductive tape restores the cable’s shielding properties.

• When splicing medium-voltage cables, what must be restored first?
• Jacket
• Conductor strand lay
• Insulation system
• Outer sheath

Rationale: Insulation must be restored to withstand operating voltage

safely.

• Which splice improves both mechanical and electrical strength?
• Pigtail splice
• Tap splice
• / 4