A block and tackle has a 7:1 mechanical advantage. To lift a load of 600 lbs one foot,
an effort force of 104 lbs must be applieD. What is the percent efficiency?
A. 17%
B. 82%
C. 96%
D. 100%
B
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What factor makes fossil fuels less desirable as an energy source for boilers?
a. They contribute to air pollution. b. They are expensive. c. They are hard to find and difficult to process. d. They have relatively low thermal energy density.
Which grades of the following CCPA number groups are used for machining alloy steel?
A) C-1 to C-8 B) C-7, C-8 C) C-3, C-4 D) C-1 to C-4
A coach is not always necessary; the vision of a job can come from the team members themselves.
Answer the following statement true (T) or false (F)
Air entering a refrigerant system can eventually lead to compressor failure.
Answer the following statement true (T) or false (F)