In order to increase fuel economy, the owner of a truck replaces the 3.73:1 rear differential with a 3.08:1 differential. If he wants to compensate for this change by replacing the 23-tooth speedometer gear, how many teeth should the new gear have?
What will be an ideal response?
19 teeth
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The bottom symbol in the accompanying figure is the ____ symbol.
A. detail B. section-view C. elevation reference D. material keynote
Because it fumes at room temperatures, hydrochloric acid creates a very corrosive work environment. A machine, working in that environment, is deteriorating fast and can be used for only 1 more year, at which time it will be scrapped with no salvage value. It was purchased 3 years ago for $88,000; its operating cost for the next year is expected to be $53,000. A more corrosion-resistant challenger will cost $226,000 with an operating cost of $48,000 per year. It is expected to have a $60,000 salvage value after its 10-year ESL. At an interest rate of 15% per year, what minimum replacement value would render the challenger attractive?
What will be an ideal response?
The ignition operating sequence and flame safety are controlled on an oil burner by:
A) The primary control. B) The thermostat and limit switch. C) The ignition transformer and oil burner. D) The combination oil valve and thermocouple.
As a safety precaution, electric duct heaters should be wired so that they will not operate unless
A) Other forms of heat are not operating B) Extra heat is needed C) The second stage of the thermostat is closed D) The fan is operating