MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Avr Microcontroller knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Do LM34 and LM35 based sensors have linear output? |
| A. | yes |
| B. | no |
| C. | depends on the conditions |
| D. | can’t say |
| Answer» B. no | |
| 2. |
In an external hardware, there are how many pins available for the LM35 and the LM34 based sensors? |
| A. | 2 |
| B. | 3 |
| C. | 10 |
| D. | 1 |
| Answer» C. 10 | |
| 3. |
IN_AN_EXTERNAL_HARDWARE,_THERE_ARE_HOW_MANY_PINS_AVAILABLE_FOR_THE_LM35_AND_THE_LM34_BASED_SENSORS??$ |
| A. | 2 |
| B. | 3 |
| C. | 10 |
| D. | 1 |
| Answer» C. 10 | |
| 4. |
Do_LM34_and_LM35_based_sensors_have_linear_output?$ |
| A. | yes |
| B. | no |
| C. | depends on the conditions |
| D. | can’t say |
| Answer» B. no | |
| 5. |
What is the temperature for LM35 sensor if the analog output is 0011 1001? |
| A. | 3 |
| B. | 9 |
| C. | 57 |
| D. | 41 |
| Answer» D. 41 | |
| 6. |
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 |
| Answer» B. to set the ground for the chip | |
| 7. |
Why for the 8 bit analog input we select Vref as the 2.56V? |
| A. | to obtain each degree count as the 2.56V |
| B. | to get 2.56V at the output |
| C. | to obtain each degree count as the 10mV |
| D. | to get 10mV as the output |
| Answer» D. to get 10mV as the output | |
| 8. |
LM35 has how many pins? |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 9. |
LM35 provides _______ V for each degree count? |
| A. | 1 |
| B. | 0.1 |
| C. | 0.001 |
| D. | 10 |
| Answer» D. 10 | |
| 10. |
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. | make connections of 8051 with an ADC to convert analog voltage to digital one, send this digital value to the controller, analyse the results |
| C. | interface sensor with the MAX232, send now to microcontroller, analyse the results |
| D. | none of the mentioned |
| Answer» C. interface sensor with the MAX232, send now to microcontroller, analyse the results | |
| 11. |
Every transducer must be connected with the signal conditioning circuit? |
| A. | true |
| B. | false |
| C. | can’t say |
| D. | depends on the conditions |
| Answer» B. false | |
| 12. |
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 |
| Answer» C. conversion from analog to digital is signal conditioning | |
| 13. |
What is the difference between the LM34 and the LM35 based sensors? |
| A. | one requires external calibration while other does not |
| B. | one has output voltage proportional to the Celsius scale while others have to the Fahrenheit scale |
| C. | one is fast other is slow |
| D. | all of the mentioned |
| Answer» C. one is fast other is slow | |
| 14. |
Transducers produce an output voltage in the form of? |
| A. | an analog voltage in the form of current |
| B. | an analog voltage in the form of voltage |
| C. | an analog voltage in the form of pressure |
| D. | all of the mentioned |
| Answer» E. | |
| 15. |
Which of the following is correct about LM35 based sensors? |
| A. | its output voltage is directly proportional to the Celsius scale |
| B. | its output voltage is directly proportional to the Fahrenheit scale |
| C. | none of the mentioned |
| D. | all of the mentioned |
| Answer» B. its output voltage is directly proportional to the Fahrenheit scale | |
| 16. |
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 |
| Answer» C. one is of low precision and the other is of higher precision | |
| 17. |
Why do we need to apply the concept of signal conditioning to a sensor? |
| A. | in order to convert it into a desirable form of energy |
| B. | for testing |
| C. | for sensing something |
| D. | all of the mentioned |
| Answer» B. for testing | |
| 18. |
Which of the following is correct about the word sensors? |
| A. | that senses something |
| B. | it is a type of a transducer that converts one form of energy to another |
| C. | it can produce output in the form of electrical pulses, current or voltage |
| D. | all of the mentioned |
| Answer» E. | |