MET Q4 - Density

Question 1

Density at the surface will be low when
(select one)

a.Pressure is low and temperature and humidity is high

b.Pressure is low and temperature and humidity is low.

c.Pressure is high and temperature and humidity is high.

d.Pressure is high and temperature and humidity is low

Answer 1

a.Pressure is low and temperature and humidity is high

Question 2

Which of the following has the greatest effect on density?
(select one)

1.Humidity

2.Temperature

3.Ozone

4.Pressure

Answer 2

4.Pressure

Question 3

As temperature increases density will
(select one)

1.decrease

2.be unaffected

3.increase

4.be constant

Answer 3

1.decrease

Question 4

What are the least favourable conditions for aircraft performance?
(select one)

a.High temperature, high pressure and low density

b.High temperature, low pressure and low density

c.Low temperature, low pressure and high density

d.Low temperature, high pressure and high density

Answer 4

b.High temperature, low pressure and low density

Question 5

What happens to temperature, pressure and density as height increases?

pressure ….
temperature …..
density ……

Answer 5

decreases
decreases
decreases

Question 6

Which of the below describes conditions where surface density will most likely be highest?
(select one)

1.pressure is high, temperature and humidity are low

2.pressure is low, temperature and humidity are high

3.pressure is low, temperature and humidity are low

4.pressure is high, temperature and humidity are high

Answer 6

1.pressure is high, temperature and humidity are low

Question 7

An aircraft departing an airport with an elevation of 3000ft and a surface air temperature of +30C may anticipate
(select one)

a. a density altitude greater than 1.225kg/m3

b. a shorter take off distance required

c. a longer take off distance required

d.a density altitude less than 1013 hpa

Answer 7

c. a longer take off distance required

Question 8

The approximate percentage of the density of the atmosphere at 40,000ft, compared to mean sea level is 75%.

(select one)

true

false

Answer 8

false

Question 9

At FL 180, the air temperature is -35°C.The air density at this level is
(select one)

a.Equal to the density of the ISA atmosphere at FL 180.

b.Less than the density of the ISA atmosphere at FL 180

c.Greater than the density of the ISA atmosphere at FL 180

d.Unable to be determined without knowing the QNH

Answer 9

c.Greater than the density of the ISA atmosphere at FL 180

Question 10

As an aircraft climbs away from the surface, atmospheric density will
(select one)

1.decrease at a decreasing rate
2.decrease at a uniform rate
3.increase at a uniform rate
4.decrease at an increasing rate

Answer 10

1.decrease at a decreasing rate