The counter-emf controller is a commonly used method for the automatic ____ of a DC motor.
a. starting
b. deceleration
c. acceleration
d. stopping
c. acceleration
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Choose the statement that best reflects the effect of automation on pilot vigilance.
A. Pilots can mitigate their stress because they are automatically challenged during a flight irregularity B. Pilots tend not to be wary of information presented by automation. C. Pilots are not affected by the information presented by automation. D. Pilots tend to be wary of information presented by automation.
IDENTIFY TEST PROCESS SYMBOLS AND DIAGRAMS
The initial cost of a packed-bed degassing reactor for removing trihalomethanes from potable water is $84,000. The annual operating cost for power, site maintenance, etc. is $13,000. If the salvage value of the pumps, blowers, and control systems is expected to be $9000 at the end of 10 years, the AW of the packed-bed reactor, at an interest rate of 8% per year, is closest to:
(a) $?26,140 (b) $?25,518 (c) $?24,900 (d) $?13,140
Which metering device used on flooded evaporators opens when more refrigerant condenses,enabling the refrigerant to flow into the evaporator?
A) Low-side float B) Automatic expansion valve C) Electronic expansion valve D) High-side float