NPTEL Sensors and Actuators Week 3 Assignment Answers 2025
1. With regards to cleanrooms, what does PPE stands for ?
- Personal protocol equipment
- Protective protocol equipment
- Personal protective equipment
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2. Complete the following sentence: “In the microfabrication facility, the desiccators are used for ———–”
- Substrate heating
- Storing substrates in vacuum
- Substrate cleaning
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3. Evaluate whether the below statement is true or false: “During the video demonstration, Impedance analyzer was performing two probe measurement which is more accurate than four probe measurement.”
- True
- False
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4. Which class of biosafety cabinet provides product, personnel, and environmental protection?
- Class 1
- Class 2
- Class 3
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5. Evaluate whether the below statement is true or false: “In photolithography, soft bake is performed at 50 degrees centigrade for 1 minute.”
- True
- False
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6. Which among the following materials can be used to fabricate microheaters?
- Diamond
- Silicon dioxide
- Nichrome
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7. Which amongst the following is used as a photoresist stripper?
- Ethanol
- Isopropyl alcohol
- Acetone
- BHF
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8. Complete the following:
“In ………… wet etching, the etch rate is dependent on crystallographic orientation of the substrate”
- Isotropic
- Anisotropic
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9. Evaluate whether the below statement is true or false:
“Deep reactive ion etching enables very low aspect ratio etches to be performed into the silicon substrates.”
- True
- False
Answer :-
10. Which amongst the following is used as the etchant of silicon dioxide?
- Ethanol
- Isopropyl alcohol
- BHF
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