Propulsion

Question 1

Minor pitting, but no cracks, detected not exceeding ___ inch in depth shall be removed using a rotary file,
wire brush, or similar hand tool or by machining.

Answer 1

1/16th inch in depth

Question 2

If the shaft is skim cut/ground, the shaft outside diameter
shall not be reduced more than ___ inch below the minimum design diameter specified on the applicable detail drawing.

Answer 2

1/8th inch below minimum design

Question 3

Cracks associated with _____ shall be completely removed and repaired by welding.

Answer 3

Pitting

Question 4

For Shaft Flanges and Flange Fillets. Minor pitting not exceeding 1/16 inch in depth shall be removed using a rotary file, wire brush or similar hand tool. Pitting greater than 1/16 inch in depth, and all cracks
detected, regardless of depth, shall be ____ repaired in accordance with MIL-STD-2191 and/or machining.

Answer 4

Weld

Question 5

METHODS FOR CHECKING SHAFT ALINEMENT

Answer 5

• Hydraulic Jack Method
• Strain Gage Method
• Gap and Sag Method
• Optical Method (The optical alinement method (boresighting) is used mostly for waterborne bearing alinement checks.)

Question 6

engines start most readily when the throttle (fuel injector rack) is slowly opened to the full fuel position during _______.

Answer 6

Cranking

Question 7

When testing for fuel dilution in oil, what is satisfactory?

Answer 7

less than 2% dilution

Question 8

What is the preferred method for cleaning small engine blocks?

Answer 8

Soaking in an alkiline solution