Name three insulating materials foamed with HCFC gas and their acronyms.
What will be an ideal response?
Extruded polystyrene (XPS), polyisocyanurate (ISO), and polyurethane (PUR).
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Which of the following statements is true regarding frequencies of radio communications? Select all that apply.
A) US regulatory agencies are the NTIA of the Department of Commerce and the FCC. B) Use of specific frequencies is regulated, but general ranges of frequency usage are not. C) Frequencies allocated by other countries are generally well coordinated with the US.
How much force is generally used to check idler arms?
A) As much as possible B) 5 lbs. C) 150 lbs. D) 25 lbs.
What is the theoretical evaporation rate?
A) 1 percent of the water supplied for every 10°F of cooling B) 0.5 percent of the water supplied for every 1°F of cooling C) 5 percent of the water supplied for every 10°F of cooling D) 5 percent of the water supplied for every 15°F of cooling
Which of these is correct about emergency or evasive action?
a. In order to turn quickly you must have a firm grip on the steering wheel. b. You can stop more quickly than you can turn to miss obstacles. c. Stopping is always the safest thing to do in a traffic emergency.