Our Refrigeration & Air Conditioning Mechanic 313A Red Seal Exam package contains 805 multiple choice questions and answers to give you the most complete exam package to help you prepare for your Inter-Provincial Red Seal Exam.

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Refrigeration & Air Conditioning Mechanics are capable of diagnosing, repairing, installing and maintaining a variety of air conditioning and refrigeration systems and combined heating, ventilation and cooling systems. As part of their job they measure cut and connect piping using welding and brazing equipment and can recharge systems with refrigerant gases as required.

Heating, air-conditioning and refrigeration systems consist of many mechanical, electrical and electronic components, such as motors, compressors, pumps, fans, ducts, pipes, thermostats and switches.

 

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I-Phone or Android device directly from your email inbox so you can study at your own pace anywhere at anytime without the worry and pressure of expiring limited online sessions. All modules have been developed in PDF and are printable if required.

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Safe working practices and accident prevention are the primary importance to the health and safety of all person(s) at any or all work place environments. All person(s) including employee, employer and government, share this responsibility in order to keep everyone free of any dangers or accidents that may cause an individual(s) serious bodily harm or death. Practicing health and safety is a tremendous contribution to a safe and accident free work place environment. 

 

Sample Questions

 

1. What would be the problem on a time-initiated, temperature-terminated defrost if the defrost cycle runs full time during periods of light coil frosting?

a. Faulty fan delay.

b. Oversized heater.

c. Faulty defrost thermostat.

d. Leaking defrost solenoid.

Ans. C

 

2. What is the probable cause of high suction pressure on a heat pump?

a. Low refrigerant charge.

b. A leaking liquid line solenoid.

c. An outdoor thermostatic expansion valve malfunction.

d. A leaking four-way valve.

Ans. D

 

3. Which three instruments are required to check the calibration of an enthalpy control on the economizer of a rooftop air conditioning unit?

a. Thermometer, sling psychro meter and multi-meter.

b.  Manometer, Pitott tube and thermometer.

c. Voltmeter, ammeter and ohmmeter.

d. Draft gauge, manometer and thermometer.

Ans. A

 

4. What is the principal function of the expansion tank in a hot water system?

a. It provides the necessary space for the air required in the system.

.b It allows the volume of the water in the system to change to maintain working pressure.

c. It acts as a safety chamber in case of over firing of the boiler.

d. It collects the air in the system, thus preventing air lock of the system while in operation.

Ans. B

 

5. Which of the following methods determines the temperature rise for proper air flow in warm air systems?

a. adjusting high limit control and comparing the new temperature with the old.

b. comparing the supply and return temperatures with the blower on and the system at steady state.

c. comparing the supply temperature when the burner is running with the supply temperature when the burner is off.

d. comparing the supply and return temperatures with the blower off and the system at steady state.

Ans. B 

 

 

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