List two common HC refrigerants.
What will be an ideal response?
methane, ethane
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When raising an extension ladder, pull the rope until the top section is in position and then _____.
a. tie the rope onto a rung to lock the desired length of the ladder b. use at least two clamps to lock the ladder into a stable position c. securely hook the locking mechanism over the desired rung d. use the locking key to securely lock the length of the ladder
When state governments require a certain testing or skill level before allowing specialized work to be performed, this is called ____________________.
Fill in the blank(s) with the appropriate word(s).
Animal urine contains potash and nitrogen in the form of urea
Indicate whether the statement is true or false.
Technician A says that the gears in a planetary gearset are in constant mesh. Technician B says that a planetary gearset has a ring gear and pinion gears. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B