Question 11 The recommended diameter of the inductive proximity sensor head is twice the width of the target. True b.

Question 11

The recommended diameter of the inductive proximity sensor head is twice the width of the target.

a.       True

b.       False

Question 12

The smaller the valve, the ____ the pressure drop develops across its restrictor.

a.       smaller

b.       greater

Question 13

One of the factors that determine the voltage amplitude of a Hall-effect device is its physical size.

a.       True

b.       False

Question 14

The advantage of a phototransistor over a photodiode detector is that _____.

a.       it operates at higher frequencies

b.       it has greater light sensitivity

c.       it is linear

d.       it has small temperature coefficients

Question 15

If the error is constant, there is ____ derivative action.

a.       large

b.       small

c.       no

Question 16

A(n) _____ operational amplifier is used to perform the reset control mode.

a.       differentiator

b.       integrator

c.       difference

Question 17

A diac is used to trigger _____.

a.       an SCR

b.       a UJT

c.       a triac

d.       op-Amp

Question 18

The lagging effect of the controlled variable behind the output state produced by the actuator is called _____.

a.       shadowing

b.       dragging

c.       hysterisis

d.       delaying

Question 19

A system that continues to oscillate is described as being _____.

a.       stable

b.       unstable

c.       overdamped

d.       critically damped

Question 20

The magnitude of the ____ output is proportional to the time duration that a deviation between set point and the controlled variable exists.

a.       on/off

b.       proportional

c.       integral

d.       derivative

e.       all of the above