When troubleshooting a residential hydronic heating system, the technician notices that the burner keeps going out on high limit. What is the most likely cause?
A. defective high limit control
B. defective circulator motor
C. defective room thermostat
D. defective zone valve
Answer: B
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The first step in applying the building code to a project is to ______.
A) determine if the building is provided with an automatic sprinkler system. B) determine the number of exits from the building at the ground floor. C) determine the occupancy classification of the building. D) determine the width of open spaces around the building.
What is the origin of nectarines?
What will be an ideal response?
Stub Acme threads are used:
A) Where more strength is needed B) For short length screws C) On long screws for translating motion and power D) Where a shallow depth with a coarse pitch is required
An LVDT is a position measuring device whose operation is based on
A. transforming a dc signal to an ac signal B. magnetic coupling of primary and secondary coils C. counting of digital pulses D. using a linear capacitor to transform a voltage differential E. changes in resistance