How many modes are there for manual operation?

How many modes are there for manual operation?

• A. 2
• B. 3
• C. 4
• D. 5

Answer: (B)

Manual operation is usually supported in three distinct ways to cover different control needs. Local control lets you operate the equipment right at the device, giving immediate access and feedback. Remote control allows operation from a central panel or control room, which is handy when the device is in a hazardous area or needs coordinated control. Manual override (or direct override) provides a way to force a known state or operate the device when automatic control isn’t available, such as during testing or fault conditions. So there are three modes for manual operation. The other counts don’t fit because they don’t reflect these common control paths.

Manual operation is usually supported in three distinct ways to cover different control needs.

Local control lets you operate the equipment right at the device, giving immediate access and feedback. Remote control allows operation from a central panel or control room, which is handy when the device is in a hazardous area or needs coordinated control. Manual override (or direct override) provides a way to force a known state or operate the device when automatic control isn’t available, such as during testing or fault conditions.

So there are three modes for manual operation. The other counts don’t fit because they don’t reflect these common control paths.