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

Question 2 of 8
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Which load profile will benefit the most from a demand driven control system?

Question 3 of 8
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How do you prevent pumps from malfunctioning when transporting hot water with a temperature of well above 120C°?

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Which temperature control systems hold the greatest potential for optimisation?

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

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Why does a cooling system that uses propylene glycol as coolant demand pumps with oversized motors?

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

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Why is ammonia an efficient coolant?

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1: Which component is often ‘the weakest link’ in centrifugal pumps?
Shaft seal
1: Which component is often ‘the weakest link’ in centrifugal pumps?
O-rings
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1: Which component is often ‘the weakest link’ in centrifugal pumps?
Flange
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2: Which load profile will benefit the most from a demand driven control system?
Low flow rate with relatively few peak periods during the day.
2: 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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2: 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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3: 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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3: 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.
3: 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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4: Which temperature control systems hold the greatest potential for optimisation?
Temperature controlled pump in single circulation systems.
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4: Which temperature control systems hold the greatest potential for optimisation?
Unregulated temperature control systems that do not adapt operation according to the load.
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4: Which temperature control systems hold the greatest potential for optimisation?
Three way valve Regulated temperature control systems that adapts operation according to the load.
5: What is the ratio between the capital investment and running costs of a temperature control system?
20:1
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5: What is the ratio between the capital investment and running costs of a temperature control system?
1:1
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5: What is the ratio between the capital investment and running costs of a temperature control system?
1:20
6: 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.
6: 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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6: 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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7: Which of the following isn’t one of the main benefits of the CM pump range?
Reliability
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7: Which of the following isn’t one of the main benefits of the CM pump range?
Global usage
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7: Which of the following isn’t one of the main benefits of the CM pump range?
External control
8: Why is ammonia an efficient coolant?
Ammonia is able to absorb large amount of heat when it evaporates.
8: Why is ammonia an efficient coolant?
Ammonia is easy to pump.
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8: Why is ammonia an efficient coolant?
Ammonia is a natural coolant with zero ozone depletion.
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