3.13 Pump head calculations

Question 1 of 10

1

A pump is sitting at rest with its discharge valve open and the pressure gauge showing 210 kPa. The total static head of the pump in this situation is 11m. If the pump takes suction from a transfer tank located 4m above it, what is the current level in the transfer tank? The liquid is water at 42 deg C.

Select one of the following:

6.5m
7.2m
5.2m
6.42m

Explanation

Question 2 of 10

1

An open, cylindrical tank contains a liquid to a height of 10 metres. If the density of the liquid is 4.0 x 103 kg/m3. what is the pressure exherted by the liquid at the bottom of the tank in kpa

Select one of the following:

331
392
259
400

Explanation

Question 3 of 10

1

__________ happens when the pressure, at any point inside a centrifugal pump, drops below the vapour pressure of the liquid, vapour bubbles will form, creating cavities in the liquid flow.

Select one of the following:

cavitation
surging
priming
chirping

Explanation

Question 4 of 10

1

An open, cylindrical tank contains a liquid to a height of 7.5 metres, if the density of the liquid is 4.5 x 103 kg/m3 what is the pressure exerted by the liquid at the bottom of the tank in kPa?

Select one of the following:

331
352
250
400

Explanation

Question 5 of 10

1

A boiler feedwater pump is to supply water from a boiler at 110 deg C. according to the manufacturer, this pump must have a minimum suction pressure of 210 kPa to ensure the required NPSH is maintained. What value of NPSH has been specified by the manufacturer?

Select one of the following:

10m
8m
7.15m
6.25m

Explanation

Question 6 of 10

1

What is the velocity in the discharge of a centrifugal pump if the velocity head is 12 m?

Select one of the following:

7.34m
6.25m
8.1m
15.34m

Explanation

Question 7 of 10

1

A liquid with a vapour pressure of 110 kPa and density of 840 kg/m3 is moved by a pump that has a NPSH of 6m. How much pressure must exist at the pump suction?

Select one of the following:

134.45kPa
125.87kPa
145.23kPa
159.44kPa

Explanation

Question 8 of 10

1

The pressure at the discharge of a water pump is 150kPa and the temperature of the water is 80 deg C. Find the equivalent head in metres.

Select one of the following:

20.21
12.55
18
15.73

Explanation

Question 9 of 10

1

What is the dynamic suction head for a pump that has a static suction head = 8m, suction pressure head = 12m, suction friction head =2m, and suction velocity head =3m

Select one of the following:

15m
22m
17m
12m

Explanation

Question 10 of 10

1

If a column of mercury has an equivalent head of 50cm. calculate the pressure produced at the bottom of the column in kPa. Relative density of mercury is 13.6

Select one of the following:

66.7
73.4
81.24
55

	Created by TRAVIS CANNING about 8 years ago

Quiz on 3.13 Pump head calculations, created by TRAVIS CANNING on 29/01/2016.

3.13 Pump head calculations

Question 1 of 10

Select one of the following:

Explanation

Question 2 of 10

An open, cylindrical tank contains a liquid to a height of 10 metres. If the density of the liquid is 4.0 x 103 kg/m3. what is the pressure exherted by the liquid at the bottom of the tank in kpa

Select one of the following:

Explanation

Question 3 of 10

__________ happens when the pressure, at any point inside a centrifugal pump, drops below the vapour pressure of the liquid, vapour bubbles will form, creating cavities in the liquid flow.

Select one of the following:

Explanation

Question 4 of 10

An open, cylindrical tank contains a liquid to a height of 7.5 metres, if the density of the liquid is 4.5 x 103 kg/m3 what is the pressure exerted by the liquid at the bottom of the tank in kPa?

Select one of the following:

Explanation

Question 5 of 10

A boiler feedwater pump is to supply water from a boiler at 110 deg C. according to the manufacturer, this pump must have a minimum suction pressure of 210 kPa to ensure the required NPSH is maintained. What value of NPSH has been specified by the manufacturer?

Select one of the following:

Explanation

Question 6 of 10

What is the velocity in the discharge of a centrifugal pump if the velocity head is 12 m?

Select one of the following:

Explanation

Question 7 of 10

A liquid with a vapour pressure of 110 kPa and density of 840 kg/m3 is moved by a pump that has a NPSH of 6m. How much pressure must exist at the pump suction?

Select one of the following:

Explanation

Question 8 of 10

The pressure at the discharge of a water pump is 150kPa and the temperature of the water is 80 deg C. Find the equivalent head in metres.

Select one of the following:

Explanation

Question 9 of 10

What is the dynamic suction head for a pump that has a static suction head = 8m, suction pressure head = 12m, suction friction head =2m, and suction velocity head =3m

Select one of the following:

Explanation

Question 10 of 10

If a column of mercury has an equivalent head of 50cm. calculate the pressure produced at the bottom of the column in kPa. Relative density of mercury is 13.6

Select one of the following:

Explanation