Worksheets40 point- All About E Lights - Recorded Examination in TLE
Total questions: 40
Worksheet time: 20mins
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
Do emergency lights require a constant power source to operate?
True
False
Not specified
Depends on the model
What is the correct orientation of a diode in an emergency light circuit?
Negative - Anode : Positive - Cathode
Positive - Anode : Negative - Cathode
White band - Anode : No band marking - Cathode
-+= diode
What is the correct order of colors of this resistor in an emergency light circuit?
Color bands: Brown-Black-Red- Gold
Color bands: Black- Brown Red - Gold
Color bands: Gold -Black -Red -Brown
Color bands: Orange -Blue - Red - Gold
What is the purpose of a capacitor in an emergency light?
Store and release electrical energy
Convert AC into DC
Step up or step down the voltage
Filter the current
How does a fuse protect the circuit in an emergency light?
By breaking the circuit when current exceeds a safe level
By increasing the voltage in the circuit
By regulating the flow of current
By converting AC into DC
What is the unit of measurement for resistance?
Ampere
Ohm
Watt
Volt
Safety lighting can help to protect individuals within a building in the event of an emergency, lighting key areas and showing the best route out of the building.
True
False
Maybe
None of the above.
A resistor's first three color bands are brown, black, and orange. What is its value?
10 ohms
10k ohms
200 ohms
1000 ohms
Read the exact value of this smd resistor.
1 ohm
10 ohms
100 ohms
1000 ohms
Give the value of this ceramic disc capacitor.
1000 uF , 3000 Volts
10, 000 nF, 3 Kilovolts
10, 000 pF, 3 kilovolts
10, 000 uF, 3 kilovolts
Name of component : Exact value
Ceramic capacitor : 1000 uF, 50 volts
Electrolytic capacitor: 1000 uF, 50 volts
Non polarize capacitor: Jackson ,-40+105 degree celsius,
Battery: 50 Volts
What is part of emergency light that is label "A" in the picture?
Leds
Glass/mirror
Plated reflector
Protective shell
What is part of emergency light that is label "E" in the picture?
Test Function
Fuse
Push button switch for L/R led
Protective shell
What is part of emergency light that is label "B" in the picture?
Leds
Glass/mirror
Plated reflector
Protective shell
What is part of emergency light that is label "C" in the picture?
Left and right indicator switch
Led indicators for charging and drain
Indicators for left and right LED
Fault function indicator
What is part of emergency light that is label "D" in the picture?
Left and right indicator spst switch
Left and right led for SPST
Left and right spst switches for LED
Top and bottom spst switches for LED
Resistors can be found in __________ types of electronic equipment
a few
no
most
all
Which of these colors is NOT used in the resistor value color code?
white
black
violet
pink
Which digit does the color green denote on a resistor color band?
2
3
4
5
What are power resistors used for?
as general purpose resistor
vary a circuit's power rating
to obtain an exact value of resistance
control large amount of current
Identify the colors of this resistor.
Brown- Black-Blue-Gold
Gold-Green-Blue-Brown
Brown-Black-Green-Gold
Gold-Yellow Green-Pareng black -Dark brown
Name this type of switch.
Push switch
SPST switch
Tact switch
Slide switch
Name this switch used in an emergency light.
Tact switch
Spst switch
Slide switch
Push button switch
Name this component.
AA battery
Non polarize capacitor
Motor capacitor
Electrolytic capacitor
What type of switch is this?
Tact switch
Slide switch
Single pole single throw switch
Push button switch
Which of the following is the electronic symbol for resistor?
Which of the following is the electronic symbol for fuse?
Which of the following is the electronic symbol for rectifier diode?
Which of the following is the electronic symbol for zener diode?
