8 questions Advanced

ECADEMY test

29 - Introduction to temperature control

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Question 3 of 8 Advanced

What is the ratio between the capital investment and running costs of a temperature control system?

Question 4 of 8 Advanced

How high is the suction lift of the self-priming CM pump?

Question 5 of 8 Advanced

Which of the following isn’t one of the main benefits of the CM pump range?

Question 7 of 8 Advanced

How do you prevent pumps from malfunctioning when transporting hot water with a temperature of well above 120C°?

Question 8 of 8 Advanced

Which component is often ‘the weakest link’ in centrifugal pumps?

Question 8 of 8 Advanced

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Correct
Q: Why does a cooling system that uses propylene glycol as coolant demand pumps with oversized motors?
A: The viscosity and density of propylene glycol is higher than tap water.
Correct
Q: Why is ammonia an efficient coolant?
A: Ammonia is able to absorb large amount of heat when it evaporates.
Correct
Q: What is the ratio between the capital investment and running costs of a temperature control system?
A: 1:20
Correct
Q: How high is the suction lift of the self-priming CM pump?
A: Up to 8 metres
Correct
Q: Which of the following isn’t one of the main benefits of the CM pump range?
A: External control
Correct
Q: How have temperature control systems traditionally been regulated?
A: Constant speed pumps and throttling valves regulating the amount of water entering the heat exchanger.
Correct
Q: How do you prevent pumps from malfunctioning when transporting hot water with a temperature of well above 120C°?
A: Equip the pump with double-shaft seals or air-cooled top.
Correct
Q: Which component is often ‘the weakest link’ in centrifugal pumps?
A: Shaft seal