Question 1

Thyristors are regenerative and cannot operate in the linear mode.

Accepted Answer

A) True 
 B)False

Question 2

If bottles of shampoo are passing the sensor location at a 100 mm distance and the sensor could be mounted on either side of the conveyor, then the best choice for a sensor would be

Accepted Answer

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

Question 3

The GCS is like an SCR except it can be turned off by applying a negative potential to its gate.

Accepted Answer

A) True 
 B)False

Question 4

The application calls for a sensor to detect the leading edge of plastic parts at a fixed distance about than 20 mm from the sensor location. Access from one side only is permitted. What is the best sensor to use?

Accepted Answer

A)  Diffused beam shart cutoff photoelectric 
B)  Diffused beam fixed focus photoelectric 
C)  Capacitive proximity 
D)  Diffused beam background suppression photoelectric 
E)  None of the above 
A)  Diffused beam shart cutoff photoelectric 
B)  Diffused beam fixed focus photoelectric 
C)  Capacitive proximity 
D)  Diffused beam background suppression photoelectric 
E)  None of the above

Question 5

Mutual interference is only a problem when proximity sensors from different vendors are used too close together.

Accepted Answer

A) True 
 B)False

Question 6

Match the device with its function.
-Shockley diode

Accepted Answer

A)  Breakover thyristor 
B)  Reverse blocking thyristor 
C)  Bidirectional thyristo 
A)  Breakover thyristor 
B)  Reverse blocking thyristor 
C)  Bidirectional thyristo

Question 7

Match the device with its function.
-Triac

Accepted Answer

A)  Breakover thyristor 
B)  Reverse blocking thyristor 
C)  Bidirectional thyristo 
A)  Breakover thyristor 
B)  Reverse blocking thyristor 
C)  Bidirectional thyristo

Question 8

Match the statement that describes a sensor type with the name of the sensor mode .
-Best not used when detected object has highly reflective surface.

Accepted Answer

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

Question 9

The diffused mode sensor used when high background light is present is

Accepted Answer

A)  Fixed focus diffused mode sensor. 
B)  Wide angle diffuse mode sensor. 
C)  Distance measurement diffused mode sensor. 
D)  Background suppression diffused mode sonsor. 
E)  None of the above 
A)  Fixed focus diffused mode sensor. 
B)  Wide angle diffuse mode sensor. 
C)  Distance measurement diffused mode sensor. 
D)  Background suppression diffused mode sonsor. 
E)  None of the above

Question 10

The six reasons sensors are used could be sumarized as: protect humans and machines from harm, for part identification and quality, for problem analysis, and to produce the fastest possible production.

Accepted Answer

A) True 
 B)False

Question 11

Both the SCR holding current and the gate trigger current parameters decrease with increasing junction temperature.

Accepted Answer

A) True 
 B)False

Question 12

Both inductive and capacitive proximity sensors can sense package contents through the packaging material.

Accepted Answer

A) True 
 B)False

Question 13

A current sinking output

Accepted Answer

A)  has current flowing into the output. 
B)  is associated with an NPN output transistor. 
C)  has current flowing out of the output. 
D)  Both A and B 
E)  Both A and C 
A)  has current flowing into the output. 
B)  is associated with an NPN output transistor. 
C)  has current flowing out of the output. 
D)  Both A and B 
E)  Both A and C

Question 14

Once a thyristor has been triggered, the trigger current can be removed.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following method is an accepted method of turning off an SCR?

Accepted Answer

A)  Increasing the leakage current 
B)  Exceeding the breakdown voltage 
C)  Removing the gate current 
D)  Exceeding the dv/dt rating 
E)  None of the above 
A)  Increasing the leakage current 
B)  Exceeding the breakdown voltage 
C)  Removing the gate current 
D)  Exceeding the dv/dt rating 
E)  None of the above

Question 16

Match the proximity sensor parameter name with the correct parameter definition.
-Sensing Distance

Accepted Answer

A)  The difference between the resetting distance and the sensing distance and is the system hysteresis. 
B)  A thin square metal plate which is used as the standard to measure proximity sensor parameters. 
C)  The point where the sensor changes from o n to off as the standard object is withdrawn from the sensor. 
D)  The distance from the sensor reference plane to the point where the standard object causes the sensor output to change from off to on. 
E)  A line perpendicular to the sensor face and in the center of the sensor surface extending directly away from the sensor 
A)  The difference between the resetting distance and the sensing distance and is the system hysteresis. 
B)  A thin square metal plate which is used as the standard to measure proximity sensor parameters. 
C)  The point where the sensor changes from o n to off as the standard object is withdrawn from the sensor. 
D)  The distance from the sensor reference plane to the point where the standard object causes the sensor output to change from off to on. 
E)  A line perpendicular to the sensor face and in the center of the sensor surface extending directly away from the sensor

Question 17

Thyristor(s) with an cathode gate is (are)

Accepted Answer

A)  SCR. 
B)  Triac. 
C)  PUT. 
D)  Diac. 
E)  A and B 
A)  SCR. 
B)  Triac. 
C)  PUT. 
D)  Diac. 
E)  A and B

Question 18

Match the device with its function.
-Diac

Accepted Answer

A)  Breakover thyristor 
B)  Reverse blocking thyristor 
C)  Bidirectional thyristo 
A)  Breakover thyristor 
B)  Reverse blocking thyristor 
C)  Bidirectional thyristo

Question 19

The sensor output that has 100 percent isolation between the sensor power and the power of the interfaced device.

Accepted Answer

A)  SCR recitifier output 
B)  Single pin current sinking output 
C)  NPN and PNP with switchable outputs 
D)  Field effect transistor output 
E)  None of the above 
A)  SCR recitifier output 
B)  Single pin current sinking output 
C)  NPN and PNP with switchable outputs 
D)  Field effect transistor output 
E)  None of the above

Question 20

The triac firing angle is equal to 180 degrees minus the conduction angle.

Accepted Answer

A) True 
 B)False

Thyristors are regenerative and cannot operate in the linear mode.

If bottles of shampoo are passing the sensor location at a 100 mm distance and the sensor could be mounted on either side of the conveyor, then the best choice for a sensor would be

The GCS is like an SCR except it can be turned off by applying a negative potential to its gate.

The application calls for a sensor to detect the leading edge of plastic parts at a fixed distance about than 20 mm from the sensor location. Access from one side only is permitted. What is the best sensor to use?

Mutual interference is only a problem when proximity sensors from different vendors are used too close together.

Match the device with its function. -Shockley diode

Match the device with its function. -Triac

Match the statement that describes a sensor type with the name of the sensor mode . -Best not used when detected object has highly reflective surface.

The diffused mode sensor used when high background light is present is

The six reasons sensors are used could be sumarized as: protect humans and machines from harm, for part identification and quality, for problem analysis, and to produce the fastest possible production.

Both the SCR holding current and the gate trigger current parameters decrease with increasing junction temperature.

Both inductive and capacitive proximity sensors can sense package contents through the packaging material.

A current sinking output

Once a thyristor has been triggered, the trigger current can be removed.

Which of the following method is an accepted method of turning off an SCR?

Match the proximity sensor parameter name with the correct parameter definition. -Sensing Distance

Thyristor(s) with an cathode gate is (are)

Match the device with its function. -Diac

The sensor output that has 100 percent isolation between the sensor power and the power of the interfaced device.

The triac firing angle is equal to 180 degrees minus the conduction angle.

Introduction to Industrial Control Systems, Discrete Control Input and Output Devices

Solidstate Devices in Industrial Applications, Operational Amplifiers and Linear ICS

Analog Processes Control Devices, Sensors and Safety

DC Motors, Control Circuits, AC Motors and Variable Speed Drives

Special Purpose Motor, Control Devices and Programmable Logic Controllers

Embedded Microcontrollers, Open and Closed Loop Process Control

Industrial Robots, Automation Systems and Data Communication Between Intelligent Machines

Filters

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

Thyristors are regenerative and cannot operate in the linear mode.

If bottles of shampoo are passing the sensor location at a 100 mm distance and the sensor could be mounted on either side of the conveyor, then the best choice for a sensor would be

The GCS is like an SCR except it can be turned off by applying a negative potential to its gate.

The application calls for a sensor to detect the leading edge of plastic parts at a fixed distance about than 20 mm from the sensor location. Access from one side only is permitted. What is the best sensor to use?

Mutual interference is only a problem when proximity sensors from different vendors are used too close together.

Match the device with its function. -Shockley diode

Match the device with its function. -Triac

Match the statement that describes a sensor type with the name of the sensor mode . -Best not used when detected object has highly reflective surface.

The diffused mode sensor used when high background light is present is

The six reasons sensors are used could be sumarized as: protect humans and machines from harm, for part identification and quality, for problem analysis, and to produce the fastest possible production.

Both the SCR holding current and the gate trigger current parameters decrease with increasing junction temperature.

Both inductive and capacitive proximity sensors can sense package contents through the packaging material.

A current sinking output

Once a thyristor has been triggered, the trigger current can be removed.

Which of the following method is an accepted method of turning off an SCR?

Match the proximity sensor parameter name with the correct parameter definition. -Sensing Distance

Thyristor(s) with an cathode gate is (are)

Match the device with its function. -Diac

The sensor output that has 100 percent isolation between the sensor power and the power of the interfaced device.

The triac firing angle is equal to 180 degrees minus the conduction angle.

Introduction to Industrial Control Systems, Discrete Control Input and Output Devices

Solidstate Devices in Industrial Applications, Operational Amplifiers and Linear ICS

Analog Processes Control Devices, Sensors and Safety

DC Motors, Control Circuits, AC Motors and Variable Speed Drives

Special Purpose Motor, Control Devices and Programmable Logic Controllers

Embedded Microcontrollers, Open and Closed Loop Process Control

Industrial Robots, Automation Systems and Data Communication Between Intelligent Machines

Filters