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WorksheetsThird year office equipment
Total questions: 55
Worksheet time: 28mins
1 -The name of Public Addressing System
unit on the right is:
Wireless mice
Speaker
Head phone
LED
The name of Public Addressing System unit on the right is:
Wireless mic
Amplifier
Head phone
LED
Component shown in figure-3 on the right is :
Wired Mic
Inductor
Audio distributor
Amplifier
The sound source , amplifier and speaker are the three components of:
Fire alarm system .
Public Address system
Security system
Fuel injection system
Select the correct statement .
Public Address System is used to protect the building.
The max. output power of amplifier must be more or equal the total power of connected speakers.
Speakers are connected in series to reduce the total value of impedance.
Microphone is used to increase the level of electrical signal.
6 – The total impedance of two speakers are :
4 Ω
16 Ω
2 Ω
None of above
7 – Select the correct statement .
Public Address System is used to protect the building.
The max. output power of amplifier must be more or equal the total power of connected speakers.
Speakers are connected in series to reduce the total value of impedance.
Microphone is used to increase the level of electrical signal.
8 – speakers shown in figure are connected in
Series.
parallel .
Parallel wiring of four speakers.
Series-Parallel wiring of four speakers.
The Public Address System component shown in figure is:
Amplifier.
Mixer.
Speaker.
Wireless microphone.
Total speaker input power is:-
48 W
38 KW
50 W
250 ohm
Advantages of high impedance speaker line system (100 volt system) is:
High loss on speaker line
All speakers are connected in Series
Volume control can be used without affecting other speakers
Easy maintenance
In Public Address system microphone is used to:
converts sound waves (vibrations) to electrical signal.
converts electrical signal to vibrations.
Increase low electrical signal to high electrical signal.
Amplifies the low frequency signal.
According to the figure which represent the main parts of dynamic phone answer the following questions:
The part ( 2 ) is:
Coil
Diaphragm.
Magnet
Battery
The part ( 3 ) is:
Coil
Diaphragm.
Magnet
Battery
The part ( 4 ) is:
Coil
Diaphragm.
Magnet.
Battery
In Public Address system speaker is used to:
converts sound waves (vibrations) to electrical signal.
converts electrical signal to vibrations.
Increase low electrical signal to high electrical signal.
Amplifies the low frequency signal.
In the shown figure The part ( 1 ) of speaker is:
Coil
Diaphragm.
Magnet
Battery
For the shown figure calculate amplifier output impedance:
12 Ω
48 Ω
128 Ω
107 K Ω
One of the following components is not sound source
Microphone
speaker
CD player
Telephone
the device shown in the figure is:
over head projector
Scanner
Video projector
amplifier
If we canceled the connection between smart board and computer what will happen?
No picture appear
The picture appear but no response between P.C and smart board
The video projector will switch off
The smart board will switch off
The following devices in fig are:
White board.
black board with video projector.
Smart board with video projector.
overhead projector.
Meaning of Warning Symbol shown in figure is:
Don’t use video projector near room heaters
Keep the projector stable
Avoid excess humidity environment
Don’t put external objects inside
Meaning of Warning Symbol shown in figure is:
Avoid excess humidity environment
Don’t put external objects inside
High voltage inside, open by
authorized
personnel only
No Power
All of the following are accessories for the projector except one:
Remote control unit
Manual – CD
pen tray
VGA connector cord
Write the aperture angle of the remote control in degrees.
Up 25° ,Down 25°, Left 60°and Right 60°
Up 15° ,Down 55°, Left 30°and Right 35°
Up 15° ,Down 15°, Left 30°and Right 30°
Up 25° ,Down 15°, Left 30°and Right 55°
When you use a projector with your SMART Board
Do not stare into the beam of light created by the projector
Don’t carry the projector
Don’t close the projector
Don’t change the power point program.
The cause for the following error condition in video projector shown in fig is:
High Temp Error
(Over Heating)
Fan Error
Sensor Error
Internal Error
Lamp Failure
The 4 colored used in smart board are:
Green, Brown, Blue, red.
Green, Yellow, Blue, red.
Green, Black, Blue, red.
Yellow, Brown, Blue, red
the warning symbol shown in figure , state that the installer should…..
Use the hammer to tap the anchors to the wall.
do not use the hammer to tap the anchors to the wall.
Hammer is useful in fixing anchors to the wall.
None of the above.
The cause for the following error condition in video projector shown in fig is:
High Temp Error
(Over Heating)
Fan Error
Sensor Error
Internal Error
Lamp Failure
The name of smart board accessory shown in figure is:
Pen tray.
Colored pen.
Eraser.
Guide manual.
The freeze button on the projector remote control is pressed……
Zooms in the image being projected on screen.
Frozen image continues project on screen.
Turns off the projector.
Display all possible operation of the projector
The menu button on the projector remote control is pressed……
Zooms in the image being projected on screen.
Stop the presentation
Turns off the projector.
Display all possible operation of the remote .
The source button on the projector remote control is pressed……
Zooms in the image being projected on screen.
Stop the presentation
searches for input signal.
Frozen image continues project on screen.
for wireless video door phone system the device shown in figure is :
Outdoor camera.
Indoor monitor .
Smart board.
None of the above.
For the device shown in figure The parts name (1) is:
Speaker.
Talk button.
Microphone.
Working indicator.
Refer the diagram of outdoor camera shown below :
The parts name (1) is:
Call button.
Camera lens.
Microphone
Charge indicator.
The parts name (8) is:
Infrared light.
Speaker.
Microphone.
Rain shield.
The parts name (7) is:
Infrared light.
Speaker.
Microphone.
Call button.
The parts name (2) is:
Call button.
Speaker.
Microphone.
Camera lens.
The one options of wireless video door phone shown in figure is:
Remote control.
Solar module charger .
Power bank.
None of the above.
In wireless video door phone no signal for indoor monitor one of reasons is:
Speaker not work.
The outdoor camera is far away from indoor monitor.
The talk volume is adjusted to be the least.
Microphone of indoor monitor not work.
In wireless video door phone image is flashing and noisy one of reasons is:
low battery.
indoor monitor is close to magnetic waves.
The talk volume is adjusted to be the least.
Microphone of indoor monitor not work.
choose the wrong features of wireless video door phone :
Rain shield for the outdoor camera.
16 chord melodies available
Date and time shown on the screen
one outdoor camera cannot supports more one indoor monitors.
The title of this system in fig is :
Public address system.
Fire alarm system.
Security system.
Wireless video door phone system
In figure-shown , the part (1) in the heat and smoke detector is:
Transistor.
Wiring tube.
Detector.
none of the above.
choose the wrong statement.
The speaker or bell provide sound dung fire.
Smoke detector activates when light passing through the sensor is obstructed.
fire alarm system helps the spread of fire in the school or in an establishment.
Fire alarm system will not activate if there is no sensor installed in the system.
In the F.A.S this device is
Fire Alarm Control Panel
manual call point.
heat detector.
Flame sensor.
The Fire Alarm Control Panel device shown in Figure is a
Heat detector
Shock detector
Gas detector
IR detector
In F. A . S the gas detector is
Input device.
Output device .
Input / output device.
None of the above
The circuit shown in fig is a
Fire alarm circuit
Home security circuit
Indoor circuit
Noise alarm circuit
The smoke sensor activates when
it detects the presence of heat
it detects the presence of flame
light received by the infrared receiver is obstructed by smoke
none of the above
The fire alarm control panel device shown in Figure is
Sounder & Strobe
Manual Call Point
IR detector
None of the above
FACP means
Fire Alarm Control Program
Fire Alarm Control Panel
Fire Alarm Control Process
Fire Alarm Control Point
