Question

The air turbine starter (ATS) is capable of dry motoring the engine up to _____ N2 RPM:

a) 28%
b) 50%
c) 70%
d) 100%

Answer 1

Typically, an air turbine starter can dry motor an engine to around 20-30% of N2 RPM, so the closest provided option would be the best estimate.

Step-by-step explanation:

The air turbine starter (ATS) is designed to spin the engine to a certain percentage of the N2 RPM for starting. Considering that the question specifically regards the air turbine starter's capabilities, we have to refer to general practices as there is no provided data to offer an exact figure. Typically, an air turbine starter is capable of dry motoring an engine to around 20-30% N2 RPM. In the context of this question, since this specific figure is not listed, a best estimate would be the closest provided option without overestimating the capability of the ATS.