Sensors, Actuators and Microcontrollers important MCQs in English/Hindi | Nielit Notes | PDF
In this post, we cover all important Questions from the topic "Sensors, Actuators and Microcontrollers".
These MCQs will definitely help to pass IT and Computer students in any exam and interview that have Sensors, Actuators and Microcontrollers topic.
Sensors, Actuators and Microcontrollers chapter covers the following topics:
1. Sensor - Measuring physical quantities in digital world e.g. light sensor, moisture sensor, temperature sensor, etc.
2. Actuator – moving or controlling system e.g. DC motor, different type of actuators.
3. Controller – Role of microcontroller as gateway to interfacing sensors and actuators, microcontroller vs microprocessor, different type of microcontrollers in embedded ecosystem.
After completion of Sensors, Actuators and Microcontrollers unit, Students will be able to understand:
- The role of Sensors, transducers in measuring physical quantities
- Working and characteristics of actuators
- Role and use of microcontroller in building various electronic devices
Sensors, Actuators and Microcontrollers MCQs
Here are the 55 most important and frequently asked MCQs from the "Sensors, Actuators and Microcontrollers" topic.
1. A sensor is not a machine.
a.True
b.False
Ans.a.True
2. An electronic device which converts physical quantity or energy from one form to another is called ______
a) Sensor
b) Transistor
c) Transducer
d) Thyristor
Ans. c
3. IoT devices and systems include sensors that track and
measure activity in the world.
a.True
b.False
Ans.a.True
4. Sensors can be:
a. Temperature
b. Light
c. Motion
d. All of the above
Ans.d.
5. What is signal conditioning?
a) to analyse any signal
b) conversion or modification is referred to as conditioning
c) conversion from analog to digital is signal conditioning
d) conversion from digital to analog is signal conditioning
Ans. b
6. LM35 has how many pins?
a) 2
b) 1
c) 3
d) 4
Ans. c
7. Actuators can be:
a. Displays
b. Motors
c. Sound
d. All of the above
Ans.d.
8. Thermocouple is an electric temperature detector that uses thermoelectric resistance create by heat.
a.True
b.False
Ans.a.True
9. A transducer is any which converts one form of energy into
another.
a.True
b.False
Ans.a.True
10. Example of sensors are:
a. Gas sensor
b. Water quality sensor
c. Moisture sensor
d. All of these
Ans.d.
11. Different kinds of signals are:
a. Mechanical, thermal
b. Magnetic, Electric
c. Chemical, Radiation
d. All of the above
Ans.d.
12. The components that are present on typical Microcontroller IC are:
a. CPU
b. Memory
c. I/O ports and timers
d. All of these
Ans.d.
13. Add, Subtract, divide, multiply and Logic operations are performed by:
a. Registers
b. Control unit
c. ALU
d. None of the above
Ans.c. ALU
14. Logical operations in a computer are done by:
a. Registers
b. Control unit
c. ALU
d. None of the above
Ans.c. ALU
15. The clock speed of the microprocessor is quit high as
compared to the microcontroller.
a.True
b.False
Ans.a.True
16. The microcontroller has less registers for instruction
execution as compared to microprocessor.
a.True
b.False
Ans.b.False
17. A microprocessor works using digits(s):
a. 1
b.0
c. 0 and 1
d. All of the above
Ans.c. ALU
18. ______ sensors produce digital output that can be directly
interfaced with the digital controller
a. Digital
b. Analog
c. Both (a) and (b)
d. None of the above
Ans.a. Digital
19. ______ indicates maximum number of bits processed in a
single instruction.
a.Actuators
b.Transducer
c.Pneumatic
d.Bandwidth
Ans.d.Bandwidth
20. A silicon chip that contains a CPU is called ______.
a.Pneumatic
b.Electric
c.Embedded Controller
d.Microprocessor
Ans.d.Microprocessor
21. Application area of 8051 Microcontroller:
a. Medical Equipment
b. Aeronautical space
c. Defense System
d. All of the above
Ans.d.
22. A sensor may not be a transducer.
a.True
b.False
Ans.a.True
23. A________ converts thermal energy into electrical
energy.
a.Bandwidth
b.Microprocessor
c.Solar
d.Thermocouple
Ans.d.Thermocouple
24. The set of instructions that the microprocessor can
execute are called.
a.Instruction set
b.Transducer
c.Pneumatic
d.Electric
Ans.a.Instruction set
25. Sensor is input devices while the actuator is output devices.
a.True
b.False
Ans.a.True
26. Characteristics of RISC:
a. Pipelining
b. Hardwired control
c. instructions executes in one clock cycle
d. All of the above
Ans.d.
27. Characteristics(s) of microprocessor:
a. Instruction set
b. Clock speed
c. Word Length
d. All of the above
Ans.d.
28. Electrical switches are the choice of actuators for most of the on-off type control action.
a.True
b.False
Ans.a.True
29. A microcontroller :
a. Saves cost
b. Saves power consumption
c. Makes the circuit
d. All of the above
Ans.d.
30. Most electrical devices we use today have microcontroller in them of some form or another.
a.True
b.False
Ans.a.True
31. A microcontroller is designed for a very specific task to control a particular system.
a.True
b.False
Ans.a.True
32. The IC of a microcontroller has memory RAM integrated on it along with some other components like I/O devices and
timers.
a.True
b.False
Ans.b.False
33. Microcontrollers are used to handle real time task as they are single programmed, self sufficient and task oriented devices.
a.True
b.False
Ans.a.True
34. Microcontroller are used to do the same assigned task repeatedly.
a.True
b.False
Ans.a.True
35. A light bulb is a transducer for converts electrical energy into optical energy.
a.True
b.False
Ans.a.True
36. ______ act as primary devices to collect.
a.Microcontroller
b.Control unit
c.Analog
d.Sensors
Ans.d.Sensors
37. Sensors main purpose is to collect data from its surrounding and ______ give out data to its surrounding.
a.Actuators
b.Transducer
c.Pneumatic
d.Electric
Ans.a.Actuators
38. What steps have to be followed for interfacing a sensor to a microcontroller 8051?
a) make the appropriate connections with the controller, ADC conversion, analyse the results
b) interface sensor with ADC and ADC with 8051
c) interface sensor with the MAX232, send now to microcontroller, analyse the results
d) none of the mentioned
Ans. b
39. A thermistor is a __________
a) sensor
b) adc
c) transducer
d) micro controller
Ans. c
40. Why Vref is set of ADC0848 to 2.56 V if analog input is connected to the LM35?
a) to set the step size of the sampled input
b) to set the ground for the chip
c) to provide supply to the chip
d) all of the mentioned
Ans. a
41. What is the difference between LM 34 and LM 35 sensors?
a) one is a sensor and the other is a transducer
b) one’s output voltage corresponds to the Fahrenheit temperature and the other corresponds to the Celsius temperature
c) one is of low precision and the other is of higher precision
d) one requires external calibration and the other doesn’t require it
Ans. b
42. A_______ is a device which converts signals from one from to another.
a.Thermocouple
b.Transducer
c.Instruction set
d.Pneumatic
Ans.b.Transducer
43. Tagging Things:
a. RFID and NFC
b. Digital watermarking
c. QR codes
d. All of the above
Ans.d.
44. A microcontroller sometimes abbreviated as:
a. uC
b. uC
c. MCU
d. All of the above
Ans.a. uC
45. Actuators include:
a. Motors, gears
b. Pumps, pistons
c. Values, switches
d. All of the above
Ans.d.
46. ______ actuators use air under pressure that is most
suitable for low to medium force, Short stroke, and highspeed applications.
a.Electric
b.Embedded Controller
c.Microcontroller
d.Pneumatic
Ans.d.Pneumatic
47. _______ actuators are typically instated in engines, where
they open and close different valves.
a.Actuators
b.Transducer
c.Pneumatic
d.Electric
Ans.d.Electric
48. The first commercial microprocessor is 4-bit 4004
developed by Intel and was made available in______.
a.1967
b.1971
c.1977
d.1981
Ans.b.1971
49. A ______ cell converts light into electricity.
a.Solar
b.Actuators
c.Transducer
d.Pneumatic
Ans.a.Solar
50. Final results of processing, before releasing, to output unit
are held in_____ unit.
a.Electric
b.Embedded Controller
c.Microcontroller
d.Memory
Ans.d.Memory
51. ______ holds the circuitry that controls the process of
executing, decoding and fetching program instructions.
a.Control unit
b.Pneumatic
c.Electric
d.Embedded Controller
Ans.a.Control unit
52. _____ Sensors produce continues signals that are
proportional to the sensed parameter.
a.Sensors
b.Actuators
c.Transducer
d.Analog
Ans.d.Analog
53. Another name for a microcontroller is _____.
a.Embedded Controller
b.Thermocouple
c.Instruction set
d.Actuators
Ans.a.Embedded Controller
54. ______ is a highly integrated chip that contains all the
components comprising a controller.
a.Microcontroller
b.Memory
c.Control unit
d.Analog
Ans.a.Microcontroller
55. A microcontroller is a true device that fits the computer-on-achip idea.
a.True
b.False
Ans.a.True
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