The indoor fan on an oil furnace is controlled by
A) A centrifugal switch on the oil burner motor
B) Either a temperature sensing fan switch or the primary control
C) The primary control
D) A temperature sensing fan switch
B
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____ units are SI quantities obtained by combining base and supplementary units.
A. Referenced B. Factored C. Combined D. Derived
Which of the following is required by OSHA standards when a crane must operate within the prohibited zone around power lines?
a. An insulating link must be installed to isolate the load from the load line. b. Two dedicated spotters must be assigned to mointor the operation. c. All members of the lift team must wear insualting garments. d. The boom of the crane must be electrically isolated from the crane body.
A ________ drill press is designed to be used when several successive operations are to be performed on a workpiece
A) radial turret B) multispindle C) upright D) gang
In a confined hydraulic circuit, what must happen when there is flow through the circuit?
A. pressure rise B. pressure drop C. fluid leakage D. fluid pressure spikes