Answer the following statement(s) true (T) or false (F)
1. Gypsum underlayment contains considerably more water than does an equal volume of concrete.
2. Suspended tube systems operate at relatively low water temperatures in comparison to other types of radiant panels.
3. Most radiant ceiling panels have low thermal mass allowing them to slowly warm up following a cold start.
4. In the case of floor heating, the average surface temperature of the floor should not exceed 85° F in rooms where prolonged foot contact with the floor is likely.
5. In most cases, the system piping method and control technique used are mutually dependent. One cannot be used without the other.
1. True
2. False
3. False
4. True
5. True
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Which of the following is a requirement for generator sets used in legally required standby systems?
a. A means of manual starting must be provided. b. The generator must carry at least 50% of the load. c. A means must be provided for automatic starting of the generator set(s). d. The standby system generator set must be started within 30 minutes after a power failure.
Water jet cutting is well suited to quickly cutting complex geometry that is difficult or impossible by regular machining methods
Indicate whether the statement is true or false
Explain the difference between a drill and a ream.
What will be an ideal response?
When troubleshooting a three-zone hydronic heating system, the technician observes that two zones are operating correctly while the third zone is not getting warm during a call for heat. What is the most likely problem?
A. defective zone valve B. defective circulator motor C. open high limit D. defective burner