A 500 k? potentiometer is connected across a 5 V source. If the voltage from the wiper to the lower end of the potentiometer is 1.2 V, what is the resistance of that lower part?
A) 380 k? B) 0 ? C) 500 k? D) 120 k?
D
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____ are hardwood blocks with threaded rods through them.
a.Wood screws b.C clamps c.Spring clamps d.Quick clamps
When the insulation requirements call for a greater depth of loose-fill insulation than the height of the ceiling joists in an attic will allow, you can provide containment for the loose-fill insulation by _____.
a. using soffit baffles to hold the excess insulation in place b. tamping down the insulation and holding it in place with plywood sheathing nailed to the ceiling joists c. laying plastic sheeting over the loose-fill insulation to hold it in place d. installing strike-off boards over the joists
The effects of small carbon particles inside the refrigeration system include which of the following? You may select more than one
A) Making the compressor shell brittle B) Improving internal compressor lubrication C) Restricting metering devices D) Grounding hermetic compressor terminals
In an oscilloscope, the ____ provide(s) a sawtooth waveform as input to the horizontal deflection amplifier.
A. sweep generator B. vertical deflection amplifiers C. power supplies D. cathode-ray tube