What is the purpose of the master thermostat in the basic zone control system?
What will be an ideal response?
The master thermostat determines the operational mode of the equipment. If the master is set to cool, a call for heat from one of the other thermostats will be ignored by the zone control.
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Technician A says reducing spark advance can cause spark knock. Technician B says excessive carbon deposits can cause spark knock. Who is correct?
A. Technician A B. Technician B C. Both A and B D. Neither A or B
The two dimensions an electrician must know when making a 90° stub bend are the _____.
a. conduit diameter and rise b. bend radius and conduit diameter c. desired rise and take-up distance d. take-up distance and conduit diam
The depth stop on a drill press is used for:
A) Alerting the operator by ringing a bell when the drilling tool is approaching the depth where it should stop B) Limiting its stroke and thus preventing the drill from drilling into the table C) Detecting when the drill has stopped cutting and then shutting off the machine D) Keeping the quill from falling out by stopping it at full depth
The LOW logic level for standard TTL input cannot exceed ________
A) 5V. B) 0.4V. C) 0.8V. D) 0.0V.