Free Printable Unit 3 Fluids and Density

1.

(a) decreases at 1"Hg per 1,000 ft increase in altitude.

Choose from the below words

Barometric Pressure

Density Altitude

True Altitude

Measured Pressure Altitude

2.

Viscosity is a fluid's resistance to (a)

Choose from the below words

flow

friction

light

heat

3.

What are the standard temperature and pressure values for sea level?

a)

0 Degrees C and 1013.2 millibars

b)

15 degrees C and 29.92" Hg

c)

59 degrees C and 1013.2 millibars

d)

59 degrees C and 29.92" Hg

4.

Knowing the pressure altitude is important to aircraft performance because it can be used as a tool to arrive at (a)

Choose from the below words

density altitude

humidity

air temperature

buoyancy

5.

Pressure altitude corrects for the difference between (a) and standard pressure.

6.

Which factor would tend to increase the density altitude at a given airport?

a)

decrease in ambient temperature

b)

increase in barometric pressure

c)

decrease in relative humidity

d)

increase in ambient temperature

7.

What is the Pressure Altitude if given

Local Barometric Pressure: 28.92" Hg

Local Elevation: 3500'

$PA\ =\ \left(29.92\ -\ Lp\right)\ x\ 1,000\ +\ Le$

You may work it out on paper, take a pic, and upload the image if you wish.

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8.

Pressure altitude is calculated from $\left(29.92\ -\ 28.92\right)\ x\ 1,000\ +3,500$ . What information do these numbers give?

a)

the barometric pressure is 29.92" Hg and the elevation is 1,000 ft.

b)

the barometric pressure is 28.92" Hg and the elevation is 1,000 ft.

c)

the barometric pressure is 29.92" Hg and the elevation is 3,500 ft.

d)

the barometric pressure is 28.92" Hg and the elevation is 3,500 ft.

9.

Which of the following are units of measure for atmospheric pressure? Select all that apply. (3.A.2)

a)

feet per second (ft/s)

b)

square centimeters $cm^2$

c)

millibars (mb)

d)

pounds per square inch (psi)

e)

inches of mercury (Hg)

10.

Which combination of atmospheric conditions will reduce takeoff and climb performance? (a) (b) (c)

Choose from the below words

high temperature

high relative humidity

high density altitude

low temperature

low relative humidity

low density altitude

11.

Which statement is true about an object moving through a fluid? (3.A.1)

a)

viscosity changes according to the size of the object

b)

the object moves faster if fluid is more viscous

c)

fluid friction increases as the object's velocity increases

d)

less viscosity means more fluid friction

12.

Which formula is used for calculating density altitude? (3.B.1)

a)

$mass\ \div\ volume$

b)

$PA\ +\left[120\left(OAT\ -\ ISA\right)\right]$

c)

$\left(29.92\ -\ L_{BP}\right)1000\ +\ L_E$

d)

$15\ -\ \left(\frac{2}{1000}\ \times PA\right)$

13.

Atmospheric pressure is _______ to air density. (3.A.2)

a)

equal to

b)

directly proportional

c)

inversely proportional

d)

unrelated

14.

The “standard day” serves as a universal baseline for measuring _______. (3.B.1)

a)

atmospheric pressure

b)

barometric pressure

c)

density altitude

d)

ground roll

15.

The Magnus Effect occurs because a spinning object drags the air around it. The air being dragged by the object interacts with the surrounding air to create regions of _______. (3.A.1)

a)

high friction

b)

warm and cool air

c)

high and low pressure

d)

high and low viscosity

16.

An airport has an elevation of 1,700 feet. A density altitude of 2,200 feet means that an aircraft will perform as if it is ________ above sea level. (3.B.1)

a)

3,900 ft

b)

500 ft

c)

1,700 ft

d)

2,200 ft

17.

The Coanda Effect is the tendency for a jet of fluid to _______. (3.A.1)

a)

force objects to move faster

b)

lift objects upward

c)

attach to a convex or bulging surface

d)

become more dense

18.

True or False. The primary reason for computing density altitude is to determine airplane performance. (3.B.1.)

a)

True

b)

False

19.

Objects with the same _______ but different masses have different densities. (3.A.2)

a)

temperature

b)

volume

c)

area

d)

viscosity

20.

In what way is the Coanda Effect similar to the Magnus Effect? (3.A.1)

a)

They both create air movement that influence the direction of an airborne object

b)

They both impact the direction of an object that has a convex or bulging surface

c)

They both involve spinning objects that create regions of low pressure.

d)

They both describe the movement of air molecules creating regions of high and low pressure.

21.

Explain how the chart would be used to determine the distance needed for an aircraft to take off. Explain why this is important. (3.B.1)

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22.

Explain how the Magnus Effect works and give a real-world example. (3.A.1)

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23.

Explain what limits an aircraft’s ability to perform and fly at extremely high altitudes. (3.A.2)

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24.

Explain why an aircraft will have diminished performance on a hot day at a high-altitude airport. (3.B.1)

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25.

What is the equation DA = PA + [120 (OAT ‒ ISA)] used for? Explain what DA, PA, OAT, and ISA represent in the equation. (3.B.1)

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26.

DA = $PA+[120(OAT‒ISA)]$

PA = $\left(29.92\ -\ L_{BP}\right)\times1000\ +\ L_E$

ISA = $15\ -\ \left(\frac{2}{1000}\times PA\right)$

Outside Air Temp: $8\degree$

Barometric Pressure: 30.53

Local Elevation: 12,408 ft

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27.

DA = $PA+[120(OAT‒ISA)]$

PA = $\left(29.92\ -\ L_{BP}\right)\times1000\ +\ L_E$

ISA = $15\ -\ \left(\frac{2}{1000}\times PA\right)$

Outside Air Temp: $37\degree$

Barometric Pressure: 29.83

Local Elevation: 27 ft

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Unit 3 Fluids and Density

Total questions: 27

Worksheet time: 35mins

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