Valve positioners are not used to ____.
A. overcome insufficient forces within the valve
B. shorten the response time in a closed-loop system
C. reduce the hysteresis effect of the diaphragm
D. provide linear positioning
E. none of the above
Answer: E
You might also like to view...
Which of the following could cause this condition?
A walk-in with TEV has the following conditions: ? Subcooling is 0° ? Superheat is 25° a. Dirty condenser b. Dirty or iced evaporator c. Overcharge d. Undercharge
Direct-expansion coils operating below the dew point of the entering airstream will:
A) Cool the water vapor (humidity) in the air and condense it as droplets on the coil. B) Expand the water vapor (humidity) in the air and condense it as droplets on the coil. C) Warm the water vapor (humidity) in the air and condense it as droplets on the coil. D) Cool the water vapor (humidity) in the air and expand it as droplets on the coil.
Which alignment angle is most likely to cause tire wear?
A) Camber B) Toe C) Caster D) SAI
Technician A says that 6 point socket is more likely than a 12 point socket to round off a fastener head. Technician B says that a 12 point socket is more likely than a 6 point socket to round off a fastener head. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B