Based on the Red Seal Appliance Service Technician exam blueprint: electrical and electronic, mechanical, water, air and sealed refrigeration systems
Practice on the go and jump straight back to where you left off.
About the certification
In Ontario, Appliance Service Technician is a non-compulsory trade administered by Skilled Trades Ontario. The apprenticeship is 6,000 hours: 5,280 on the job and 720 in school. Across Canada it is the Red Seal trade Appliance Service Technician, so passing the Certificate of Qualification exam also earns the interprovincial Red Seal endorsement.
The Red Seal exam has 120 multiple-choice questions in 6 blocks: occupational skills (8 questions), electrical and electronic systems (36), mechanical systems (22), water systems (14), air systems (11) and refrigeration sealed systems (29). Diagnosing electrical and electronic components is the heaviest task with 23 questions. Block G, gas systems, is not common core and has no questions. Between 40 and 50% of the questions test procedural knowledge and application, 35 to 45% critical thinking, and 10 to 20% knowledge and recall. The Red Seal self-assessment guide gives the pass mark as 70%.
ExamHub's free 445A practice quiz has 150 original questions weighted to the real exam blocks and tasks, with an explanation and a source for every answer. Refrigerant handling questions use Ontario Regulation 463/10 (ozone-depleting substances and other halocarbons) and the federal Environmental Code of Practice for refrigerants, with the Red Seal Appliance Service Technician standard as the blueprint.
What's covered
Categories group the 20 Red Seal exam tasks, weighted like the real exam.
Try a few
Five sample questions from the question bank, with the answer and explanation.
Why: R = V² / P = 240² / 5400 ≈ 10.7 Ω. A reading of OL (infinite) shows an open element, and a reading much lower than expected suggests a shorted section.
Why: Regulations forbid charging a system with halocarbon only to leak test it. Dry nitrogen is inert and dry. Oxygen and oily compressed air are dangerous around oil in a system.
Why: O. Reg. 463/10 s. 19(1) forbids discharging a halocarbon refrigerant into the natural environment or within a building. The refrigerant must be recovered into a suitable cylinder.
Why: The Whirlpool technical manual lists a supply flow requirement with a minimum of 20 psi and a maximum of 120 psi. Pressures outside this range cause slow filling or damaged valves and hoses. Always read the specification for the model being serviced.
Why: The clutch transmits motor power to the basket for the spin. Worn clutch pads allow slipping, so the basket does not reach spin speed. The clutch is inspected and rebuilt or replaced.
FAQ
The Red Seal Appliance Service Technician exam has 120 multiple-choice questions. ExamHub's bank has 150 questions, and Test Mode draws a 120-question timed simulation.
The Red Seal self-assessment guide for this trade gives the pass mark as 70%. The Red Seal exam page does not state a time limit, and ExamHub's Test Mode allows up to 4 hours.
6 blocks: occupational skills (8 questions), electrical and electronic systems (36), mechanical systems (22), water systems (14), air systems (11) and refrigeration sealed systems (29). Diagnosing electrical and electronic components is the heaviest task with 23 questions. Gas systems are not common core and are not on the exam.
No. Appliance Service Technician is a non-compulsory trade in Ontario. Skilled Trades Ontario issues the Certificate of Qualification when the exam is passed, and the trade is part of the Red Seal program.
No. These are original practice questions written from the Red Seal standard and free public sources. They are not copies of exam questions.