40 point- All About E Lights - Recorded Examination in TLE

Name this component used in power supply of emergency light.

• Inductor

• Transformer

• Filter

• Rectifier diode

Purpose of this component in emergency light.

• Converts Ac into dc

• Reduce voltage

• Filtering/energy storage

• Rectifies

Purpose of this component in emergency light.

• Converts Ac into dc

• Limit the flow of electric current & to discharged the capacitor

• Filtering

• Rectifies

Purpose of this component in power supply.

• Converts AC into DC

• Discharged the capacitor

• Filtering

• Reduce voltage

The white band of the rectifier diode denotes the ____.

• Anode : -

• Anode : +

• Cathode : -

• Cathode :+

The 2 terminals of rectifier diode.

• Anode + & Cathode -

• White + & Black -

• Left + and right -

• Top + & bottom -

For this component, what is the correct orientation of this diode?

• Negative - Anode : Positive - Cathode

• Positive- Anode: Negative - Cathode

• White band-Anode: No band marking- Cathode

• -+= diode

Emergency lights has no battery therefore the unit needs to be plug into the outlet for powering the lamps.

• True

• False

• Maybe

• All of the above

When testing an emergency light batteries make sure that positive terminal is connected to negative terminal.

• True

• False

• Maybe

• All of the above

What is the purpose of a transformer in an emergency light?

• Converts AC into DC

• Step up or step down the voltage

• Filtering

• Rectifies the current