Kysymys 1 näistä 8
Edistyneille
What is the expected payback time of an investment in system optimisation?
Kysymys 2 näistä 8
Edistyneille
Why is ammonia an efficient coolant?
Kysymys 3 näistä 8
Edistyneille
Which of the following isn’t one of the main benefits of the CM pump range?
Kysymys 4 näistä 8
Edistyneille
Why does a cooling system that uses propylene glycol as coolant demand pumps with oversized motors?
Kysymys 5 näistä 8
Edistyneille
How high is the suction lift of the self-priming CM pump?
Kysymys 6 näistä 8
Edistyneille
How do you prevent pumps from malfunctioning when transporting hot water with a temperature of well above 120C°?
Kysymys 7 näistä 8
Edistyneille
Which load profile will benefit the most from a demand driven control system?
Kysymys 8 näistä 8
Edistyneille
Which component is often ‘the weakest link’ in centrifugal pumps?
Kysymys 8 näistä 8
Edistyneille
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Onneksi olkoon. Olet läpäissyt testin ja suorittanut 29 - Introduction to temperature control
Valitettavasti et läpäissyt 29 - Introduction to temperature control testiä tällä kertaa
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1: What is the expected payback time of an investment in system optimisation?
1-12 months
1: What is the expected payback time of an investment in system optimisation?
1-5 years
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1: 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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2: Why is ammonia an efficient coolant?
Ammonia is able to absorb large amount of heat when it evaporates.
2: Why is ammonia an efficient coolant?
Ammonia is easy to pump.
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2: Why is ammonia an efficient coolant?
Ammonia is a natural coolant with zero ozone depletion.
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3: Which of the following isn’t one of the main benefits of the CM pump range?
Reliability
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3: Which of the following isn’t one of the main benefits of the CM pump range?
Global usage
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3: Which of the following isn’t one of the main benefits of the CM pump range?
External control
4: 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.
4: 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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4: 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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5: How high is the suction lift of the self-priming CM pump?
Up to 5 metres
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5: How high is the suction lift of the self-priming CM pump?
Up to 8 metres
5: How high is the suction lift of the self-priming CM pump?
Up to 10 metres
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6: How do you prevent pumps from malfunctioning when transporting hot water with a temperature of well above 120C°?
Equip the pump with external cooling.
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6: How do you prevent pumps from malfunctioning when transporting hot water with a temperature of well above 120C°?
Equip the pump with double-shaft seals or air-cooled top.
6: How do you prevent pumps from malfunctioning when transporting hot water with a temperature of well above 120C°?
Isolating the pump and install heat tracing.
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7: Which load profile will benefit the most from a demand driven control system?
Low flow rate with relatively few peak periods during the day.
7: Which load profile will benefit the most from a demand driven control system?
High flow rate with relatively few low flow periods during the day.
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7: Which load profile will benefit the most from a demand driven control system?
Varying flow rate with relatively often periods with full flow and no flow.
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8: Which component is often ‘the weakest link’ in centrifugal pumps?
Shaft seal
8: Which component is often ‘the weakest link’ in centrifugal pumps?
O-rings
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8: Which component is often ‘the weakest link’ in centrifugal pumps?
Flange
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