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Bending of a transmitting sound beam after it passes through one medium into another describes:

Which of the following changes will improve axial resolution?

PRF refers to the ______ of pulses occurring per second.

Which receiver function includes enveloping and rectification? 

Is the wall filter set too high, or too low in the following image?

As the Cold War intensified in the 1950s and 1960s the threat of _____  was a real possibility.

Which of the following will decrease volumetric efficiency in a reciprocating engine?   1. Full throttle operation.2. Low cylinder head temperatures.3. Improper valve timing.4. Sharp bends in the induction system.5. High carburetor air temperatures.

A _____________ propeller is a compromise between a climb and cruise propeller.

When a propeller produces thrust, _______ _______ occurs due to the aerodynamic and mechanical forces that are present.

What is the running valve clearance of a piston engine equipped with hydraulic lifters?