Question 1

Match the proximity sensor parameter name with the correct parameter definition.
-Standard Correction Factor

Accepted Answer

A)  A value used to change sensor parameters when the detected object is not a standard object. 
B)  The maximum rate that a standard object can cause the output to change states. 
C)  The maximum sensing distance with a standard object for a sensor when the worst case conditions for supply voltage and ambient temperature are present

Question 2

Which of the following is not a characteristic of a triac?

Accepted Answer

A)  Either a positive or negative gate signal will turn it on 
B)  It can conduct current in either direction 
C)  It has an internal intrinsic standoff ratio 
D)  It is a three terminal device

Question 3

When you match a sensor output to a controller input you should

Accepted Answer

A)  have the opposite for the input that you used for the output. 
B)  have a current sourcing at both the input and output. 
C)  have a current sinking at both the input and output. 
D)  not worry about the type it does not make any difference.

Question 4

Capacitive proximity sensors generate eddy currents in the parts entering their electric field.

Accepted Answer

A) True 
 B)False

Question 5

Match the proximity sensor parameter name with the correct parameter definition.
-Frequency Response

Accepted Answer

A)  A value used to change sensor parameters when the detected object is not a standard object. 
B)  The maximum rate that a standard object can cause the output to change states. 
C)  The maximum sensing distance with a standard object for a sensor when the worst case conditions for supply voltage and ambient temperature are present

Question 6

Match the statement that describes a sensor type with the name of the sensor mode .
-Sensor mode sometimes called photo proximity

Accepted Answer

A)  Polarized retroreflective sensor type 
B)  Retroreflective photoelectric sensor type 
C)  Through-beam photoelectric sensor type 
D)  Diffuse photoelectric sensor type

Question 7

Two of the five types of proximity sensors offered by vendors are wand and rectangular.

Accepted Answer

A) True 
 B)False

Question 8

The PUT anode leakage current is the current that flows from the gate to the anode with the cathode shorted.

Accepted Answer

A) True 
 B)False

Question 9

In general unshielded sensors have a larger sensing distance and a wider sensing area.

Accepted Answer

A) True 
 B)False

Question 10

Before the triac, designers used two SCRs in series to accomplish the triac function.

Accepted Answer

A) True 
 B)False

Question 11

The structure of the diac is PNP material with a slice on N -material at both ends.

Accepted Answer

A) True 
 B)False

Question 12

Inductive sensors can only detect parts that have some magnetic material present.

Accepted Answer

A) True 
 B)False

Question 13

The SCS is like an SCR except the SCS has an added cathode gate.

Accepted Answer

A) True 
 B)False

Question 14

Match the statement that describes a sensor type with the name of the sensor mode .
-Most requently used sensing mode

Accepted Answer

A)  Polarized retroreflective sensor type 
B)  Retroreflective photoelectric sensor type 
C)  Through-beam photoelectric sensor type 
D)  Diffuse photoelectric sensor type

Question 15

If pill boxes are passing the sensor location at a 40 mm distance and the sensor can only be mounted on one side of the conveyor, then the best choice for a sensor would be

Accepted Answer

A)  Inductive proximity. 
B)  Capacitive proximity. 
C)  Transmitted -beam photoelectric. 
D)  Diffused -beam photoelectric. 
E)  None of the above

Question 16

Match the statement that describes a sensor type with the name of the sensor mode .
-Photoelectric sensor with light source and receiver packaged in separate housings.

Accepted Answer

A)  Polarized retroreflective sensor type 
B)  Retroreflective photoelectric sensor type 
C)  Through-beam photoelectric sensor type 
D)  Diffuse photoelectric sensor type

Question 17

‪ 
-This transistor model represents the_________.

Accepted Answer

A)  Bidirectional triode thyristor 
B)  Gate controlled switch 
C)  Silicon bilateral switch 
D)  Silicon controlled switch 
E)  None of the above

Question 18

Sensors are non -contact type devices, have electronics cirucits to generate the measurement, have numerous output circuit options, are always faster than switches , and require an external source of power.

Accepted Answer

A) True 
 B)False

Question 19

Match the device t o the schematic symbol.
-UJT

Accepted Answer

A)   
B)   
C)

Question 20

An inductive proximity sensor's output turns on when the internal oscilator starts oscillating but the capacitive proximity sensor operation is just the opposite.

Accepted Answer

A) True 
 B)False

Exam 3: SCRS, Triacs, Other Thryristors, Discrete Automation Sensors and Devices

Match the proximity sensor parameter name with the correct parameter definition. -Standard Correction Factor

Which of the following is not a characteristic of a triac?

When you match a sensor output to a controller input you should

Capacitive proximity sensors generate eddy currents in the parts entering their electric field.

Match the proximity sensor parameter name with the correct parameter definition. -Frequency Response

Match the statement that describes a sensor type with the name of the sensor mode . -Sensor mode sometimes called photo proximity

Two of the five types of proximity sensors offered by vendors are wand and rectangular.

The PUT anode leakage current is the current that flows from the gate to the anode with the cathode shorted.

In general unshielded sensors have a larger sensing distance and a wider sensing area.

Before the triac, designers used two SCRs in series to accomplish the triac function.

The structure of the diac is PNP material with a slice on N -material at both ends.

Inductive sensors can only detect parts that have some magnetic material present.

The SCS is like an SCR except the SCS has an added cathode gate.

Match the statement that describes a sensor type with the name of the sensor mode . -Most requently used sensing mode

If pill boxes are passing the sensor location at a 40 mm distance and the sensor can only be mounted on one side of the conveyor, then the best choice for a sensor would be

Match the statement that describes a sensor type with the name of the sensor mode . -Photoelectric sensor with light source and receiver packaged in separate housings.

‪ -This transistor model represents the_________.

Sensors are non -contact type devices, have electronics cirucits to generate the measurement, have numerous output circuit options, are always faster than switches , and require an external source of power.

Match the device t o the schematic symbol. -UJT

An inductive proximity sensor's output turns on when the internal oscilator starts oscillating but the capacitive proximity sensor operation is just the opposite.