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DFITBB > Pressure, Force, and Flow of Water > Flashcards

Pressure, Force, and Flow of Water Flashcards

1
Q

The pressure of a ______ object is in a downwards AND upwards direction

A

Liquid

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2
Q

If a liquid exerts a force on an object, what is the direction of the force?

A

Downwards and outwards

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3
Q

If the cistern holds 40 litres of water, you can work out the force of water leaving the tap.

A
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4
Q

What is acceleration?

A

The rate at which an object increases its velocity

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5
Q

What are the units for pressure

A

Pascal N/s²

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6
Q

If water is stationary, the type of pressure is ______.

A

Static

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7
Q

What are the units for flow rate

A

Litres per second l/s or Litres per minute l/m

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8
Q

How many kPa’s is atmospheric pressure?

A

101.3 kPa

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9
Q

How many metres of pipe is one elbow equivelant to?

A
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10
Q

What are the units for force

A

Newtons N

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11
Q

What can affect flow rate?

A

Flow rate can be affected by many factors:

  • Changes in direction,
  • Pipe size,
  • Pressure,
  • Length of pipe,
  • Frictional resistance,
  • Con
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12
Q

Increasing the pipe diamiter increases the ______ of water

A
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13
Q

What force in the picture pushes the water down the pipe and out of the tap, causing a flow of water.

A
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14
Q

What is flow rate?

A

The amount of fluid that flows through a pipe at a given time

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15
Q

If you reduce the diamiter of the pipe, does the presure and flow rate increase or decrease?

A

Both the pressure and flow rate decrease

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16
Q

What is velocity?

A

The rate at which an object changes its position, taking into account speed and direction

17
Q

How do you work out intensity of pressure?

A

Head height x 9.81 (gravity) = Intensity of Pressure N/m2

18
Q

If you reduce the diamiter of a pipe, does the speed of the water increase or decrease?

A
19
Q

What is the resistance for:

  • Elbow,
  • Tee,
  • Stop valve,
  • Check valve,
  • Pulled bend.
A
  • Elbow = 0.5m
  • Tee = 0.6m
  • Stop valve = 4.0m
  • Check valve = 2.5m,
  • Pulled bend =
20
Q

If a solid item exerts a force on an object, what is the direction of the force?

A

Downwards only

21
Q

If water is moving, the type of pressure is ______.

A

Dynamic

22
Q

What are the units for acceleration

A

Metres per second squared m/s²

23
Q

How many kilos is 5 litres of water

A
24
Q

Why does a change in direction affect the flow rate?

A

Changing the direction offers resistance to the flow of water

25
Q

What are the units for velocity

A

Metres per second m/s

26
Q

What is flow rate?

A

Flow rate is the amount of fluid that flows through a pipe at a given time.

27
Q

What is force?

A

An influence on an object that may cause it to move

28
Q

The pressure of a ______ object is in a downwards direction only

A

Solid

DFITBB (2 decks)

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