The ability to resist change in viscosity as an oil heats up is called its ____________________.
Fill in the blank(s) with the appropriate word(s).
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6. Speed control of a DC motor is much smoother if two separate ____________________, which convert the AC voltage to DC voltage, are used to control the motor instead of resistors connected in series with the armature.
Fill in the blank(s) with the appropriate word(s).
The wire speed control dial can be advanced or slowed to control the burn weld size and ____.
A. flow rate B. cooling rate C. travel rate D. deposition rate
What is a secondary refrigerant?
A) A secondary refrigerant is used to replace an older CFC or HCFC B) A secondary refrigerant is used in the second stage of a staging system C) A secondary refrigerant absorbs heat through temperature change only D) A secondary refrigerant adds extra cooling capacity to the primary refrigerant
Vibrations in a boring operation can be:
A) Stopped by increasing the feed rate B) Caused by an unbalanced cutting tool C) Caused by a long boring bar D) All of the above