Identify the axiom or postulate that applies to the following statement. If a = 7 cm and b = 7 cm, then a = b
Fill in the blank(s) with the appropriate word(s).
Quantities equal to the same quantities or to equal quantities are equal to each other
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Which of the following statements is true?
a. If an HVAC contractor detects an IAQ problem during routine maintenance, the contractor should immediately inform the customer about the problem in writing. b. HVAC contractors have no liability for system repairs that do not meet local code requirements if the code was changed before the repairs were completed. c. Occupants of a building who claim to suffer from sick-building syndrome may sue the owner of the building, but not the HVAC contractor, for damages. d. The International Building Code requires that HVAC contractors assume unlimited liability when retrofitting existing systems.
Hard starting may also occur in a low ambient condition, causing low head pressures.
Answer the following statement true (T) or false (F)
Left-hand threads are cut by:
A) Using a standard tool and setting the compound 29.5 degrees to the left of the operator B) Using a left hand threading die as these threads cannot be made on an ordinary lathe C) Turning the tool upside down, reversing the rotation of the spindle and moving the tool from left to right D) Making a right hand thread and turning it end for end
Explain the most obvious signs of leaks in a heater core.
What will be an ideal response?