Kysymys 1 näistä 8
Edistyneille
Which of the following isn’t one of the main benefits of the CM pump range?
Kysymys 2 näistä 8
Edistyneille
How high is the suction lift of the self-priming CM pump?
Kysymys 3 näistä 8
Edistyneille
What is the expected payback time of an investment in system optimisation?
Kysymys 4 näistä 8
Edistyneille
What is the most efficient and simple way of controlling heating, cooling and refrigeration systems?
Kysymys 5 näistä 8
Edistyneille
How have temperature control systems traditionally been regulated?
Kysymys 6 näistä 8
Edistyneille
Which component is often ‘the weakest link’ in centrifugal pumps?
Kysymys 7 näistä 8
Edistyneille
Why is ammonia an efficient coolant?
Kysymys 8 näistä 8
Edistyneille
Why does a cooling system that uses propylene glycol as coolant demand pumps with oversized motors?
Kysymys 8 näistä 8
Edistyneille
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Testitulokset
Onneksi olkoon. Olet läpäissyt testin ja suorittanut 29 - Introduction to temperature control
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1: Which of the following isn’t one of the main benefits of the CM pump range?
Reliability
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1: Which of the following isn’t one of the main benefits of the CM pump range?
Global usage
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1: Which of the following isn’t one of the main benefits of the CM pump range?
External control
2: How high is the suction lift of the self-priming CM pump?
Up to 5 metres
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2: How high is the suction lift of the self-priming CM pump?
Up to 8 metres
2: How high is the suction lift of the self-priming CM pump?
Up to 10 metres
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3: What is the expected payback time of an investment in system optimisation?
1-12 months
3: What is the expected payback time of an investment in system optimisation?
1-5 years
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3: What is the expected payback time of an investment in system optimisation?
System optimization is rarely economical valuable but should be done due to environmental concerns
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4: What is the most efficient and simple way of controlling heating, cooling and refrigeration systems?
Intelligent three way valves controlling the amount of water to the pump and heat exchanger accordingly.
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4: What is the most efficient and simple way of controlling heating, cooling and refrigeration systems?
Intelligent pumps equipped with temperature sensors that measure the outlet temperature and signal the pump to regulate its flow accordingly – without the use of valves.
4: What is the most efficient and simple way of controlling heating, cooling and refrigeration systems?
Thermos element three way valves controlling the amount of water to the heat exchangers.
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5: How have temperature control systems traditionally been regulated?
Constant speed pumps and throttling valves regulating the amount of water entering the heat exchanger.
5: How have temperature control systems traditionally been regulated?
Constant pressure valves regulating the amount of water entering the heat exchanger.
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5: How have temperature control systems traditionally been regulated?
Three way valves controlling the amount of water entering the pump.
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6: Which component is often ‘the weakest link’ in centrifugal pumps?
Shaft seal
6: Which component is often ‘the weakest link’ in centrifugal pumps?
O-rings
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6: Which component is often ‘the weakest link’ in centrifugal pumps?
Flange
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7: Why is ammonia an efficient coolant?
Ammonia is able to absorb large amount of heat when it evaporates.
7: Why is ammonia an efficient coolant?
Ammonia is easy to pump.
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7: Why is ammonia an efficient coolant?
Ammonia is a natural coolant with zero ozone depletion.
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8: Why does a cooling system that uses propylene glycol as coolant demand pumps with oversized motors?
The viscosity and density of propylene glycol is higher than tap water.
8: Why does a cooling system that uses propylene glycol as coolant demand pumps with oversized motors?
The viscosity and density of propylene glycol is lower than tap water.
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8: Why does a cooling system that uses propylene glycol as coolant demand pumps with oversized motors?
Propylene glycol has a lower specific heat capacity and therefor requires a higher flow.
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