What is the purpose of flux?
A) To remove light surface oxidation and prevent new oxidation
B) To promote surface tension in the solder
C) The flux makes it easier to assemble the fitting.
D) To prevent the solder from alloying with the pipe
A
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Bull Built, a design/build engineering company that has always given year-end bonuses in the amount of $4,000 to each of its engineers, is having cash flow problems. The president said that although Bull Built couldn’t give bonuses this year, next year’s bonus would be large enough to make up for this year’s omission. If the interest rate is 10% per year, what is the equivalent bonus that engineers should receive next year?
What will be an ideal response?
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.
DOT 5 brake fluid ________
A) May be mixed with DOT 3 and DOT 4 fluid B) Absorbs water easily C) Both A and B D) Neither A nor B
The efficiency of a capacitor-coupled class A amplifier is
A) the ratio of the power supplied to the load to the power delivered by the dc supply B) usually about 10% C) always less than 25% D) all of the above