Certification Exam Second Period

Alberta Electrician Apprenticeship Certification Exam (Second Period) Practice (Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A| Instant Download Pdf

Q1. What is the minimum size of grounding electrode conductor required for a 200A service using copper?

• No. 8 AWG
• No. 6 AWG
• No. 4 AWG
• No. 2 AWG

Rationale: Copper grounding electrode conductors for 200A services

require at least No. 6 AWG according to standard service grounding tables.

Q2. Which device is used to limit inrush current in motor starting?

• Contactor
• Relay
• Soft starter
• Transformer

Rationale: Soft starters reduce inrush current by controlling voltage

applied during startup.

Q3. What is the synchronous speed of a 4-pole induction motor on a 60 Hz supply? 1 / 3

A. 1200 RPM

B. 1500 RPM

C. 1800 RPM

D. 3600 RPM

Rationale: Synchronous speed = 120 × frequency ÷ poles = 120×60 ÷ 4 =

1800 RPM.

Q4. A 3-phase system has line voltage 600V. What is its phase voltage?

A. 277V

B. 208V

C. 240V

D. 346V

Rationale: Phase voltage = line voltage ÷ √3 = 600 ÷ 1.732 ≈ 346V.

Q5. What is the purpose of an overload relay?

• Short-circuit protection
• Ground fault protection
• Motor overcurrent protection
• Phase correction

Rationale: Overload relays protect motors from excessive current over time,

not short circuits.

Q6. What is the maximum disconnect height above the floor?

• 1.8 m
• 1.5 m
• 2.0 m
• 2.2 m

Rationale: Maximum permissible height for disconnect operation is 2.0 m.

• / 3

Q7. What is the trip characteristic of a Class 10 overload?

• Trips in 2 sec
• Trips in 20 sec
• Trips within 10 sec
• Delayed indefinite

Rationale: Class 10 overloads must trip within 10 seconds at locked-rotor

current.

Q8. Which connection gives the highest starting torque for a 3-phase motor?

• Part winding
• Soft start
• Wye start
• Delta start

Rationale: Delta provides full-line voltage, producing highest starting

torque.

Q9. What does a VFD primarily control?

• Torque
• Current
• Voltage
• Frequency

Rationale: VFDs vary motor speed by changing frequency.

Q10. Which meter measures insulation resistance?

• Multimeter
• Ohmmeter
• Megger
• Clamp meter
• / 3