The Mach meter is used to report

Where is the fuel-air mixture ignited?

In a simple linear regression, the slope coefficient represents the expected change in the dependent variable for a one-unit increase in the independent variable.

Microswitches are used primarily as limit switches to

Leaning the mixture decreases fuel flow, which compensates for the increased air density at high altitude.

An aircraft with an AHRS means it has a

Which statement regarding an aircraft instrument vacuum system is true?

The green arc on an aircraft temperature gauge indicates

Radio altimeters work on the principle of  

We turn on the pitot heat before we enter the clouds because: