Vitamin E and ____________________ both function as a part of a multicomponent antioxidant defense system.
Fill in the blank(s) with the appropriate word(s).
selenium
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An open-loop system is practical only if:
A) Local codes allow discharge of nontoxic antifreeze solutions into the water supply. B) A local stream or pond can be used as the water supply. C) The secondary refrigerant loop temperature can be closely monitored. D) There is an adequate supply of water and it is of good quality.
When lubricating universal joints, which of the following is best practice?
A. apply grease until you hear the first trunnion seal pop B. pump grease until it exits from all four trunnion seals C. apply two shots of grease per trunnion D. disassemble and hand pack each bearing cap
Three flip-flops are wired together as a binary counter and the input clock frequency is 600 Hz. What is the output frequency of the highest order Q output?
A) 120 Hz B) 100 Hz C) 50 Hz D) 60 Hz
When using a step ladder, never stand on the _____________________.
A. top step B. top cap C. horizontal bars on the back of the ladder D. a, b, and c