All of the following statements are true with respect to engine mechanical testing except: Group of answer choices It helps to determine what major engine work is needed. It is an integral part of preventive maintenance. The tests start off broad and narrow down as each test is performed. Testing needs to be done before tune-up parts are replaced.

Afan that can provide air speeds up to 60 m/s is to be used in a low-speed wind tunnel with atmospheric air at 35 c. if one wishes to use the wind tunnel to study flat-plate boundary layer behavior up to reynolds numbes of re 10, what is the minimum plate length that should be used? at what distance from the leading edge would transition occur if the critical reynolds nurnber were rer,e = 5 × 105?