Hydraulic Pumps Quiz

What is that ?

• A local small booster Pump

• A filter

• A Pressure sensor

• A control valve

• A bird feeder

What is the flow direction ? (Everything is properly installed)

• Red

• Yellow

• Blue

• We cannot know

• Matlagito

What is (one of) the function of the Domestic Hot Water Recirculation Pumps

• heat the water directly

• boost the hot water pressure in the system

• Increase the cold domestic water pressure

• Provide instant hot water

• To decorate the technical room

What is the minimum static filling pressure required at the base of the system?

• 1,5 bars

• 5 bars

• It depends on the volume of water in the system

• 40 mWc

• 40 Shahbaz

In a closed system, with same pipe diameter - same pipe length - same flow Which building configuration will result in higher pressure losses

• The tall vertical building

• The long horizontal building

• Both will have the same head loss

• It depends on the pump

• It depends on Vaddy Venkatesh mood

In this closed chilled water system, what is the flow ?

• 15 m/s

• 50 m3/h

• 280 m3/h

• 250 m3/h

• 7 Prajapati/minutes

In this closed chilled water system with 1/2 pump running, we measured the flow=175m3/h. We now turn the second pump (The pumps are identic, and there is no VFD), with the 2 pumps running what is the new flow?

• 175 m3/h, only the head has changed

• 200 m3/h

• 300 m3/h

• 350 m3/h

• Do not turn ON Vaddy is sleeping

In this closed chilled water system, the flow was measured before the VFD installation ? What is the new flow at 30HZ

• 6 GPM

• 10 m3/h, Only the Head has changed

• 7,5 m3/h

• 5 m3/h

• Abdullah and Richard will install a flow meter, I will respond in 1-hour inch’Allah

In this closed chilled water system, after installing a VFD the head was divided by 4, what are the savings per hour if 1kWh=0,30 SAR

• 3 SAR/h

• No savings

• 30 SAR/h

• 21 SAR/h

• Enough to organize a lunch with the audit team

Why do we replace the 3 ways control valves with 2 ways when we install a VFD on pumps

• The 2 ways valves are less expensive

• The 3 ways valves are not available anymore in the market

• The Differential pressure in the system does not change with the 3 ways valve

• The VFD can damage the 3 ways valves

• To increase the CAPEX and obtain a bigger BONUS