MACH

If temperature decreases when flying at constant CAS at FL 200, the mach meter Indication will...... and the true mach number will....?

• AIncrease increase.
• BDecrease decrease.
• CNot change not change.
• DNot change increase.

If OAT increases whilst maintaining constant CAS and flight level:

• ATAS decreases.
• BTAS remains constant.
• CMach number remains constant
• DMach number decreases.

If OAT decreases while maintaining constant CAS and flight level:

• AMach number increases.
• BTAS increases.
• CMach number remains constant.
• DTAS remains constant.