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APLC unit 1and 2

Total questions: 49

Worksheet time: 25mins

Name
Class
Date
1.

PLC works with which values?

a)

Octal

b)

Boolean

c)

Hexadecimal

d)

All of the above

2.

1 nibble =

a)

4 byte

b)

4 bits

c)

4 KB

d)

8 bits

3.

1 word =

a)

16 bytes

b)

16 KB

c)

8 bits

d)

16 bits

4.

Full form of ADC is

a)

Analog to Data Converter

b)

Analog to Digital Converter

c)

Amplitude to Digital Converter

d)

Analog to Discrete data

5.

1 byte =

a)

16 bytes

b)

16 KB

c)

8 bits

d)

16 bits

6.

A binary number with one digit is called a ____

a)

Bit

b)

byte

c)

Word

d)

Nibble

7.

Analog signal can be converted to Digital values using

a)

Resolution

b)

Sampling

c)

Memory

d)

Allocation

8.

The A/D converter samples the amplitude of the analog signal at

a)

Discrete intervals

b)

Discrete function

c)

maximum range

d)

None of the above

9.

Three types of analog signals in PLC programming___ ____ ____

a)

Voltage, Current & Resistance

b)

Voltage, Current & Transistor

c)

Resistor, Current & Transistor

d)

All

10.

The process of mapping continuous infinite values to a smaller set of discrete finite values is ______

a)

Resolution

b)

Quantization

c)

Sampling

d)

ADC

11.

The number of bits used to represent the analog input defines

a)

Resolution

b)

Range

c)

Sampling

d)

ADC

12.

PLC Value 27648 represents 10V analog signal. calculate the real resolution of our analog signal.

a)

361.7 μV

b)

367.7 μV

c)

369.7 μV

d)

360.7 μV

13.

In Siemens PLC, what is Overshoot Range?

a)

22.86 mA

b)

22.96 mA

c)

22.81 mA

d)

22.76 mA

14.

In Siemens PLC, what is Undershoot Range?

a)

1.815 mA

b)

1.885 mA

c)

1.15 mA

d)

1.185 mA

15.

In Siemens PLC, what is Overflow Range?

a)

22.86 mA

b)

22.96 mA

c)

22.81 mA

d)

22.76 mA

16.

Wiring of Analog signals is categorised into?

a)

Voltage and Resistance

b)

Voltage and Current

c)

Resistance and Current

d)

None of the above

17.

Which of the following is example for input analog sensors and transmitters.

a)

Submersible Level Transmitters

b)

Pressure Transmitter

c)

Temperature Sensor

d)

All

18.

Temperature transmitter with a 4-20 mA output. Connected to the transmitter is a temperature sensor.The transmitter is then calibrated to a range of 0-100 degrees. What this means is that when the temperature is 100 degrees the output of the transmitter will be _____

a)

4 mA

b)

12mA

c)

16mA

d)

20mA

19.

What is common between both voltage and current analog signal wiring?

a)

Temperature

b)

Resistance

c)

Reactance

d)

Current

20.

Analog voltage inputs has two terminals, what are those?

a)

AGND and AIP

b)

AIN and AG

c)

AIN and AGND

d)

None of the above

21.

All electrical wires (conductors) have resistance and hence creating a ____ drop.

a)

Current

b)

Resistance

c)

Voltage

d)

All

22.

PLC analog module terminal AIN is connected to______terminal of voltage source.

a)

Positive(+)

b)

Negative(-)

c)

Ground

d)

signal

23.

PLC analog module terminal AGND is connected to______terminal of voltage source.

a)

Positive(+)

b)

Negative(-)

c)

Ground

d)

signal

24.

Which terminal is used as reference for our analog signal?

a)

AIN

b)

AGND

c)

AIGND

d)

AGND

25.

How can we reduce the effect of Electromagnetic Interference?

a)

Sampling

b)

Shielding

c)

EMC

d)

Resistance

26.

The current in analog signals is usually measured in _____unit

a)

Resistance

b)

Voltage

c)

Amperes (A).

d)

milliamperes (mA).

27.

A resistor is put between positive (AI) and negative (AGND). This will converts our current signal to a

a)

Capacitor

b)

Closed loop

c)

Voltage drop

d)

Shunt Resistor

28.

What is the resistance of shunt resistor in Siemens analog input module.

a)

300 Ohm

b)

250 Ohm

c)

350 Ohm

d)

250 Kohm

29.

Which analog input Wiring method is separates the supply from the signal

a)

2-wire Analog Input

b)

3-wire Analog Input

c)

4-wire Analog Input

d)

All

30.

convert the raw value from the analog input to some sort of engineering value Is

a)

unscaling

b)

scaling

c)

both a and b

d)

none of these

31.

Example for engineering value is

a)

ampere

b)

volt

c)

resistence

d)

kg

32.

The block used for scaling in PLC is

a)

FC 107

b)

FC 106

c)

FC 105

d)

BC 105

33.

FC 105 has -------- inputs

a)

3

b)

2

c)

5

d)

4

34.

The range of Raw value in siemens plc is

a)

0-376

b)

500-27648

c)

0-2724

d)

0-10240

35.

Example for Analog outputs for PLC are

a)

motor

b)

sensor

c)

valve

d)

both a and c

36.

PLC Analog outputs need ------------

a)

Signal

b)

discrete signal

c)

pulse signal

d)

continuous

37.

Wiring of Voltage and Current IS

a)

same in PLC

b)

TRUE

c)

FALSE

d)

both a and b

38.

Wiring of Voltage and Current is depends on

a)

input

b)

sensor

c)

plc

d)

load

39.

Voltage Output consist of how many terminal

a)

2

b)

3

c)

4

d)

1

40.

opposition that a circuit presents to changes in current or voltage

a)

flux density

b)

line

c)

impedance

d)

current

41.

Two extra terminals are used in voltage analog output wiring for

a)

load

b)

for compensating

c)

for signal

d)

all of the above

42.

Minimum load impedance in Voltage wiring is

a)

500 Ohm

b)

1k ohm

c)

300 ohm

d)

500-1k ohm

43.

if we want to generate 8mA signal from plc what value should be given D to A converter

a)

761

b)

286

c)

1069

d)

1213

44.

The need of scaling function in PLC for

a)

processing

b)

to show the measurement on an HMI.

c)

It is convenient to work with the engineering

d)

both a and c

45.

The need of unscaling function in PLC module can convert to an output for processing

a)

to show the measurement on an HMI.

b)

none of these

c)

module can convert to an output

d)

for processing

46.

Two extra terminals are used in voltage analog output wiring for

a)

load

b)

for compensating

c)

for signal

d)

all of the above

47.

Minimum load impedance in Voltage wiring is

a)

500 Ohm

b)

1k ohm

c)

300 ohm

d)

500-1k ohm

48.

Current Output consist of how many terminal

a)

2

b)

3

c)

4

d)

1

49.

Temperature transmitter with a 4-20 mA output. Connected to the transmitter is a temperature sensor. The transmitter is then calibrated to a range of 0-100 degrees. What this means is that when the temperature is 0 degrees the output of the transmitter will be _____

a)

4 mA

b)

12mA

c)

16mA

d)

20mA

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