PRESSURE ALTIMETER

#1. The diagram below shows a simple altimeter. The parts labelled A, B, C and D are:

• Apitot pressure inlet, linkage mechanism, bellows, quadrant.
• Bair inlet, temperature compensator, leaf spring, linkage mechanism.
• Cstatic pressure inlet, partially evacuated capsule, linkage mechanism, subscale setting device.
• Dstatic pressure inlet, partially evacuated capsule, leaf spring, linkage mechanism.

#2. In the International Standard Atmosphere, the mean sea level pressure is ......., the lapse rate of temperature ....... between MSL and ....... and is isothermal up to ........ The numbers missing are:

• A1225 mb; 2° per 1000 ft; 37 000 ft; 66 000 ft
• B1013.25 mb; 1.98°C per 1000 ft; 36 090 ft; 65 617 ft
• C1013.25 mb; 1.98°C per 1000 ft; 36 090 ft; 104 987 ft.
• D1225 mb; 1.98°C per 1000 ft; 36 090 ft; 104 987 ft

#3. An aircraft taking off from an airfield with QNH set on the altimeter has both static vents blocked by ice. As the aircraft climbs away the altimeter will:

• Aread the airfield elevation.
• Bindicate the aircraft height amsl.
• Cread the height of the aircraft above the airfield
• Dshow only a very small increase in height