Which of the following is NOT a cause of steady state error?
A) System design fault
B) Disturbances or a change in the set point
C) Lack of precision in the control system components
D) Location of the sensing device too far away from the actual process
D
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It is important ____ to remove scabbed tissue, which is the way a cut flower naturally “heals” itself
The waxy substance produced by the stem in order to halt moisture loss is actually impervious to water.
a. to re-cut flower stems b. to put flowers into warm water c. to use special plant food d. to immediately immerse cut stems in very cold water
In the periodic function of Fig. 17.62,
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Technician Asays pedal free play is the first easy movement of the brake pedal before the braking action begins to engage. Technician B says pedal free play should only be about 1/16 to 3/16 on most cases. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
What is the purpose of the roll-out switches?
A) to shut the gas valve off if flames roll out of the combustion area B) to shut of the gas valve if the flames do not light within a few seconds C) to shut off the gas valve if the air leaving the furnace becomes too hot D) to coordinate the fan operation with the normal flame rollout on the furnace