?Technician A says that a fan is not necessary at freeway speeds. Technician B says that the fan is supposed to push air through the radiator. Who is right?
A. ?Technician A only
B. ?Technician B only
C. ?Both A and B
D. ?Neither A nor B
Answer: A
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Which plastics material has the highest thermal expansion value??
A. ?phenol-formaldehyde B. ?silicones C. ?polyethylene D. ?epoxy
Exterior stairs made of wood or plastic composite deck boards are often used to provide access from decks to the finish grade.
Answer the following statement true (T) or false (F)
____ are taken up by the roots and distributed throughout the plant’s vascular system
a. Systemic insecticides c. Spray solutions b. Horticultural oils d. Systemic pesticides
A chemical engineer is considering two sizes of pipes for moving distillate from a refinery to the tank farm. A small pipeline will cost less to purchase (including valves and other appurtenances), but will have a high head loss and, therefore, a higher pumping cost. The small pipeline will cost $1.7 million installed and have an operating cost of $12,000 per month. A larger-diameter pipeline will cost $2.1 million installed, but its operating cost will be only $8000 per month. Which pipe size is more economical at an interest rate of 1% per month on the basis of an annual worth analysis? Assume the salvage value is 10% of the first cost for each pipeline at the end of the 10-year project.
What will be an ideal response?