The strength-to-weight ratio of material is an important criterion when selecting material for aerospace applications. Calculate the average strength-to-weight ratio for the following materials:
a. aluminum alloy
b. titanium alloy
c. steel.
Note, the strength-to-weight ratios shown here were calculated based on lower specific weight and yield strength values.
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Technician A says that in a two-speed Ravigneaux gear train, one sun gear is driven whenever the turbine shaft turns. Technician B says that it will always be in neutral if there is no reaction member. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
The automotive ____ is supplied from the manufacturer to the customer through a large parts and service distribution system.
A. warehouse B. industrial account C. aftermarket D. fleet account
Technician A says that the number of threads per inch on a metric bolt is called pitch. Technician B says that metric bolt threads are designated by the distance between threads measured in millimeters. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
How does a power burner differ from an atmospheric burner?
A) A power burner uses air forced into the combustion area by a fan. B) Power burners are primarily for residential use. C) An atmospheric burner has a fan used to force air into combustion. D) Atmospheric burners are rarely used today.