A Normally Closed Push Button ____

question 10

Multiple Choice

A normally closed push button ____.

• A) is generally used to represent a start button
• B) has only one pole
• C) is generally used to represent a stop button
• D) is referred to as common

---

Definitions:

Observational Study

A research method involving the collection of data without interference with the subjects’ natural environment.

Case-control

A type of observational study that compares individuals with a specific condition (cases) to those without the condition (controls) to identify potential risk factors.

Retrospective

Looking back on or dealing with past events or situations.

Independent Risk Factor

A variable that on its own increases the likelihood of developing a disease or health condition, independent of other factors.