Refrigeration & Air Conditioning Mechanic Red Seal · Question
A refrigeration system has a pressure transducer providing a 4 mA to 20 mA signal. If the transducer's range is 0 kPa to 1000 kPa, what pressure does a 12 mA signal represent?
The 4-20 mA signal represents 0% to 100% of the range. The usable range is 16 mA (20-4). A 12 mA signal is 8 mA above the 4 mA minimum. So, (8 mA / 16 mA) * 100
Start free practice for Refrigeration & Air Conditioning Mechanic Red Seal
500 questions · no signup required · 40 free questions per day
Question: A refrigeration system has a pressure transducer providing a 4 mA to 20 mA signal. If the transducer's range is 0 kPa to 1000 kPa, what pressure does a 12 mA signal represent?
Answer options:
- 250 kPa
- 400 kPa ✅ 500 kPa
- 600 kPa
Correct answer: 500 kPa
Explanation: The 4-20 mA signal represents 0% to 100% of the range. The usable range is 16 mA (20-4). A 12 mA signal is 8 mA above the 4 mA minimum. So, (8 mA / 16 mA) * 1000 kPa = 500 kPa.
Start free practice for Refrigeration & Air Conditioning Mechanic Red Seal
500 questions · no signup required · 40 free questions per day
More about Refrigeration & Air Conditioning Mechanic Red Seal
Related Questions
- 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
- Which type of electric motor requires a capacitor for starting and running, offering higher efficiency and bet
- When evacuating a refrigeration system, what is the recommended deep vacuum level, typically measured in micro
More for Refrigeration & Air Conditioning Mechanic Red Seal candidates
FAQs
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
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Refrigeration & Air Conditioning Mechanic Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.