____ lubrication is the condition in which the friction between two surfaces that are in motion is determined by the properties of the surfaces and the properties of the lubrication that is being used, excluding viscosity.
A. Barrier
B. Boundary
C. Film
D. Residual
Answer: B
You might also like to view...
As a fully-submerged object is lifted through the water’s surface, the crane operator should expect the load weight to _____.
a. rapidly increase b. rapidly decrease c. remain unchanged d. gradually quadruple
The NEC® requires a minimum clearance of __________ feet above residential property and driveways where the voltage to ground does not exceed 300 volts.
a. 18 b. 10 c. 15 d. None of the above
Valve lifters are designed in which of these ways?
A) Cut at an angle B) Dome shaped to assist in rotation C) Ground on one side to compensate for cam offset D) Only replaced in complete sets
The typical start up sequence for a hot surface ignition system is:
A) Combustion blower prepurge, igniter energized after a delay, gas valve energized after a delay, flames sensed, indoor blower energized after time delay. B) Combustion blower, indoor blower, igniter, and gas valve all energized simultaneously. C) Gas valve and igniter energized, flames sensed, combustion blower and indoor blower energized after time delay. D) Combustion blower energized, igniter energized and gas valve energized, flames sensed, indoor blower energized after time delay.