MACHMETER

#1. The local speed of sound is equal to: (K = Constant)

• AK √ temperature (°F) knots
• BK √ temperature (°K) knots
• CK √ temperature (°C. knots
• DK √ temperature (°K) metres per second

#2. At FL 350 with a JSA deviation of -12, the true airspeed when flying at M 0.78 is

• A460 kt
• B436 kt
• C447 kt
• D490 kt

#3. Below is a schematic diagram of a Machmeter. Parts A, B, C and D are:

• Aratio arm, mach no pointer, static pressure inlet, ranging arm.
• Branging arm, limiting mach no index, static pressure inlet, ratio arm.
• Cmain shaft, TAS index, pitot pressure inlet, ranging arm.
• Dranging arm, limiting mach no index, pitot inlet, main shaft.