Chapter 3 - Density

Which of the following statement is correct (P.31)?

• Density is inversely proportional to pressure

• Density is directly proportional to pressure

• Density has nothing to do with pressure

• Density has a negative relationship with pressure

Which of the following statement is correct (P.31)?

• If temperature goes up, density goes down

• If temperature goes up, density goes up

• If temperature goes up, density goes up then down

• If temperature goes up, density stays constant

Which of the following statement is correct (P.31)?

• Density is directly proportional to humidity

• Density has nothing to do with humidity

• If humidity goes up, density goes up

• If humidity goes up, density goes down

Which of the following statement is correct (P.33)?

• An increase in density will reduce lift

• An increase in density will increase take-off run

• An increase in density will increase the maximum take-off weight

• An increase in density has no effect on lift

Above 26,000 feet (P.32):

• density reduces to zero with an increase in altitude

• density stays constant with an increase in altitude

• density increases with an increase in altitude

• density decreases with an increase in altitude

At mean sea level, the outside air temperature is +18°C. What is the approximate density (P.32)?

• 1.225 kg/m³

• 1237 g/m³

• 1213 g/m³

• 1225 g/m³

At mean sea level, the pressure is 1023 hPa. The approximate density is (P.32):

• 1213 g/m³

• 1237 g/m³

• 1225 g/m³

• 1123 g/m³

If the air temperature is high (P.33):

• take-off run will increase

• lift will increase

• maximum take-off weight will increase

• engine thrust will increase

If the air temperature and humidity are both low (P.33):

• lift will decrease

• rate of climb will improve

• take-off distance required will increase

• maximum take-off weight will decrease

On a hot and humid day (P.33):

• climb performance will be poor

• engine thrust will reduce

• take-off distance required will increase

• all the answers are correct