The non-contacting type of seal is called the ________
A. mechanical seal
B. lip seal
C. stuffing box
D. labyrinth seal
D
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Photo-operated devices fall into one of three categories. What are the categories?
What will be an ideal response?
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A sudden loss of crane load may cause a _____.
a. whiplash effect b. power failure c. fire d. hydraulic problem
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When a fuel cell is functioning, it produces:
A. Electricity only B. Hydrogen only C. Electricity and water D. Electricity and oxygen
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A distribution duct has an area of 2.1 sq ft and an air speed of 340 ft/ min. A side duct of 1.0 sq ft splits off. The main duct reduces in size to 1.4 sq ft. What is the air flow in the main duct after the split?
Fill in the blank(s) with the appropriate word(s).
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