Question

Special handling precautions should be taken when working with MOS devices. The statement which is not true is:
1. All test equipment should be grounded.
2. MOS devices should have their all leads shorted together during shipment and storage.
3. Never remove or insert MOS devices with the power on.
4. MOS devices do not require grounding straps used for CMOS.

Answer 1

Correct Answer - Option 4 : MOS devices do not require grounding straps used for CMOS.

Concept

Explanation:

MOSFET handling precautions:

1) Never insert or remove MOSFET from a circuit with the power ON.

2) Never apply input signal when the dc power supply is off.

3) wear a grounding strap on your wrist when handling the MOSFET device.

4) When storing MOSFET, keep the device Leeds in contact with the conductive Foam or connect a shorting ring around the tables.

5) All test equipment should be grounded.

Explanation:

So statements 1, 2, 3 are correct but statement 4 wrong because when storing MOSFET keep the leads shorted together to avoid the unnecessary flow of current to protect the MOS device.