Refrigeration & Air Conditioning Mechanic Red Seal · Question
A refrigeration unit requires service to its evaporator fan motor. Before beginning work, the technician must disable and lock out the power source. Which of the following is the LAST step in a proper Lockout/Tagout (LOTO) procedure?
After locking and tagging, verifying isolation by attempting to start the equipment (or checking for stored energy) is the critical final step to ensure zero en
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Question: A refrigeration unit requires service to its evaporator fan motor. Before beginning work, the technician must disable and lock out the power source. Which of the following is the LAST step in a proper Lockout/Tagout (LOTO) procedure?
Answer options: ✅ Verify isolation by attempting to start the equipment
- Place the lockout device and tag on the energy isolating device
- Notify affected employees that energy will be isolated
- Shut down the machinery or equipment
Correct answer: Verify isolation by attempting to start the equipment
Explanation: After locking and tagging, verifying isolation by attempting to start the equipment (or checking for stored energy) is the critical final step to ensure zero energy state before work begins.
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Question explanations
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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