OIT Core Knowledge and Fundamentals 3 — Questions and Answers
Question 1: What is the primary function of a torque wrench in industrial trades?
- To loosen heavily corroded fasteners
- To apply a specific measured amount of rotational force to a fastener (Correct answer)
- To measure thread pitch on bolts
- To strip damaged bolt heads safely
Correct answer: To apply a specific measured amount of rotational force to a fastener
A torque wrench allows a tradesperson to tighten fasteners to a precise torque specification, preventing under- or over-tightening.
Question 2: Which of the following best describes a journeyperson in the Ontario trades system?
- An apprentice who has completed half of their training hours
- A tradesperson who has completed apprenticeship and holds a Certificate of Qualification (Correct answer)
- A supervisor with five or more years of experience
- A contractor licensed to operate independently
Correct answer: A tradesperson who has completed apprenticeship and holds a Certificate of Qualification
A journeyperson has completed their apprenticeship program and passed the certification exam, earning a Certificate of Qualification (C of Q).
Question 3: In an industrial setting, what does the term 'PPE' refer to?
- Plant Production Equipment
- Personal Protective Equipment (Correct answer)
- Pre-task Planning and Evaluation
- Pressurized Pneumatic Engineering
Correct answer: Personal Protective Equipment
PPE stands for Personal Protective Equipment — gear worn by workers to minimize exposure to hazards such as hard hats, gloves, and safety glasses.
Question 4: What is the purpose of a ground fault circuit interrupter (GFCI) in industrial electrical work?
- To prevent voltage surges from damaging equipment
- To cut power when current leaks outside the intended circuit path, preventing electric shock (Correct answer)
- To regulate voltage supplied to sensitive instruments
- To protect wiring from overheating due to excess load
Correct answer: To cut power when current leaks outside the intended circuit path, preventing electric shock
A GFCI detects small differences between incoming and outgoing current caused by leakage and trips the circuit rapidly to prevent electrocution.
Question 5: What does a micrometer measure that a standard ruler cannot accurately provide?
- Overall length of long workpieces
- Very precise dimensions to thousandths of an inch or hundredths of a millimeter (Correct answer)
- Flatness and surface finish quality
- Angles and bevel measurements
Correct answer: Very precise dimensions to thousandths of an inch or hundredths of a millimeter
A micrometer provides highly precise linear measurements far beyond the resolution of a standard rule, critical for close-tolerance industrial work.
Question 6: Which Ohm's Law formula correctly calculates current (I) in a circuit?
- I = V × R
- I = V / R (Correct answer)
- I = R / V
- I = V + R
Correct answer: I = V / R
Ohm's Law states I = V / R, meaning current equals voltage divided by resistance.
Question 7: In Ontario, which body administers the apprenticeship and certification of industrial trades workers?
- Ontario College of Trades (OCOT) / Skilled Trades Ontario (Correct answer)
- The Ontario Safety Association for Community and Healthcare
- Ontario College of Applied Arts and Technology
- Technical Standards and Safety Authority (TSSA)
Correct answer: Ontario College of Trades (OCOT) / Skilled Trades Ontario
Skilled Trades Ontario (formerly OCOT) is the provincial body that registers apprentices, issues Certificates of Qualification, and oversees trades regulation in Ontario.
OIT Core Knowledge and Fundamentals 3
What is the primary function of a torque wrench in industrial trades?