E-PolyLearning

1. What is the main objective of process control?
a. to control physical parameters
b. to control mechanical parameters
c. to control optical parameters
d. to control electrical parameters
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Answer: (a).to control physical parameters

2. What is a process control system?
a. system to keep the parameters at zero value
b. system to maintain the parameters constant
c. system to keep the parameters at highest value
d. system to check the voltage
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Answer: (b).system to maintain the parameters constant

3. Physical parameters change due to ________
a. voltage
b. current
c. internal and external disturbances
d. power
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Answer: (c).internal and external disturbances

4. A process control system consists of ________
a. 10 elements
b. 6 elements
c. 2 elements
d. 4 elements
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Answer: (d).4 elements

5. For proper feedback in a process control element, it is required to ________
a. measure P
b. measure set point
c. measure error
d. measure comparator
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Answer: (a).measure P

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