BI_8B

Question 1

What is the purpose of a pilot valve operator on a float controller?

Answer 1

To remove the load of valve operation from the float mechanism, permitting freer movement of float and larger valves. Ref: p. 128

Question 2

Why are switches and mercury switches so popular in level control applications?

Answer 2

Such switches are either normally open or closed; they are on-off devices most often used for simple level control system applications. Ref: p. 134

Question 3

The property of an electrical component that contains a conductor separated by a nonconductor which permits the storage of energy is called a _______.

Answer 3

Capacitors ref: p. 135

Question 4

Multiple variable speed motors may be used and operated in parallel to perform what function?

Answer 4

Relieve the load on a pump system. Ref: p.140

Question 5

The three basic electrical attributes that form the basis for electronic level-measuring sensors are? a) capacitance b) resistance c) inductance d) all of the above

Answer 5

d) all of the above ref: p. 135

Question 6

Examples diaphragm instruments that use hydrostatic pressure to measure level: a) air-trap instruments b) air-bubble instruments c) differential pressure d) all of the above

Answer 6

d) all of the above ref: p. 140