Basic Aerodynamics

1149. How many fundamental units in physics?

• a) 5
• b) 6
• c) 7

1150. The fundamental units used in aerodynamics are?

• a) Mass, length and Velocity.
• b) Mass, length, time, pressure and temperature.
• c) Mass, length, time and temperature.

1151. What is sea level pressure?

• a) 1012.3 mb.
• b) 1013.2 mb.
• c) 1032.2 mb.

1152. Acceleration is?

• a) The change in speed divided by the time during which the change takes place.
• b) The distance that a moving object covers in a unit of time.
• c) Denoted by v, which comes from the Latin word velocitas.

1153. A standard atmosphere was introduced by?

• a) ICAO
• b) CAAV
• c) Vietnam Airlines

1154. Static pressure acts?

• a) Only in the direction of the flow
• b) Equally in all directions
• c) Only in the direction of aircraft motion.

1155. The speed of sound is less at high altitudes because the temperature?

• a) Is constant.
• b) Is higher.
• c) Is lower.

1156. Temperature at altitude above 11km will?

• a) Increase exponentially.
• b) Decrease exponentially.
• c) Remain constant.

1157. With increasing altitude at altitude from 3 to 8 km, pressure decreases and?

• a) Temperature increases.
• b) Temperature decreases.
• c) Temperature remains constant.

1158. How do you understand about the tropopause?

• a) The tropopause has different heights around the earth.
• b) The tropopause has the heights less than 3 kilometers over the equator.
• c) The tropopause has the same heights around the earth.