NPTEL Sensors and Actuators Week 9 Assignment Answers 2025
1. Evaluate whether the below statement is true or false:
“Temperature and humidity are the controlling parameters in a cleanroom, which needs to be maintained and monitored.”
- True
- False
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2. Which of the following is the expression of Boyle’s Law?
- PV=nRT
- PV=const
- P/T= const
- V/T= const
Answer :-
3. Complete the following sentence:
“Cleanrooms are classified by the amount of _____________ size particles in one _____________ of air.”
- nano, cubic foot
- micron, cubic meter
- nano, cubic meter
- micron, cubic foot
Answer :-
4. Unipolar and Bipolar stepper motors come under which classification category?
- classification based on the type of rotor
- classification based on the kind of winding
- classification based on the kind of polarity
Answer :-
5. Evaluate whether the below statement is true or false:
“In VOC or gas sensors, we prefer a sensing layer made of nanostructure materials because they have higher sensitivity at lowered room temperature due to a lower surface-to-volume ratio than thin films.”
- True
- False
Answer :-
6. Mention the mandatory PPEs to be worn while working on a wet bench inside a cleanroom:
- Lab shoes
- Aprons
- Appropriate gloves
- All of the above
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7. Evaluate whether the following statement is True/False:
“ISO 6 clean rooms are much cleaner than ISO 8 clean rooms.”
- True
- False
Answer :-
8. Complete the following:
“The study of cells and their structures is known as …………..”
- Histology
- Immunology
- Cytology
Answer :-
9. A stepper motor has 240 poles. The step angle is given by:
- 1.8 degree
- 1.5 degree
- 1.2 degree
Answer :-
10. Which of the following statements regarding cleanroom protocol is not true?
- Do not enter the clean room wearing loose clothes.
- Removing gloves and face masks for any clean room garments is prohibited in the clean room and should only be removed in the gowning area of the cleanroom.
- The de-gowning process goes in reverse order compared to the gowning process.
- Applying makeup in a clean room is also prohibited, as makeup is a huge source of contamination.
- None of the above
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