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WorksheetsExpert-Level MDS Quiz (Questions 11-20)
Total questions: 40
Worksheet time: 20mins
Which component manages wireless communication in mobile devices?
PMIC
RF transceiver
Digitizer
Battery
What does the Liquid Damage Indicator (LDI) detect?
Battery overheating
Water exposure
Screen damage
Charging faults
Which fault is most likely if a phone vibrates but shows no display?
Battery fault
Touch IC failure
Backlight circuit issue
Charging port damage
Which tool is used to detect short circuits on a mobile PCB?
Hot air gun
Multimeter in diode mode
Plastic pry tool
Screwdriver
Which motherboard section handles RF signal amplification?
Power section
Baseband section
RF section
Charging section
Which sensor detects phone orientation and rotation?
Accelerometer
Gyroscope
Ambient light sensor
Proximity sensor
What is the first step in diagnosing a phone that won’t power on?
Replace the screen
Check battery voltage
Clean the charging port
Test the power button
Which component is most likely faulty if the phone heats up rapidly during charging?
RF IC
PMIC
Battery
Speaker
Which repair tool is used for reballing BGA components?
Flux cleaner
Hot air rework station
Plastic pry tool
Multimeter
Why is ESD protection critical during motherboard servicing?
To prevent overheating
To avoid electric shock
To prevent component damage from static discharge
To improve soldering
What is the function of the digitizer in a smartphone?
Displays images
Detects touch input
Controls battery charging
Amplifies sound
Which component is responsible for managing battery charging and voltage regulation?
RF IC
PMIC
Touch Controller
Baseband Processor
Which tool is used to clean corrosion from water-damaged components?
Vinegar
IPA (Isopropyl Alcohol)
Petrol
Distilled water
What does proper documentation during disassembly help prevent?
A. Component misplacement
B. Water damage
C. Battery swelling
D. Software corruption
Which sensor turns off the screen during calls?
Gyroscope
Proximity sensor
Ambient light sensor
Accelerometer
What is the role of flux paste during reballing of BGA components?
Insulates the board
Improves solder adhesion
Cools the IC
Removes oxidation
Which fault is diagnosed by checking the microphone and receiver?
Audio fault
Display fault
Charging issue
Boot loop
Which section of the motherboard interconnects all hardware components?
Charging section
Motherboard
Display section
RF section
What is the purpose of a hot air rework station?
To test battery voltage
To remove and replace soldered components
To clean the screen
To measure resistance
Which mobile fault is caused by a loose or broken charging port?
Boot loop
Charging issue
Display fault
Audio fault
What is the main purpose of a multimeter in mobile servicing?
Soldering components
Measuring voltage, resistance, and continuity
Removing screens
Cleaning corrosion
Which display type is commonly glued to the frame in smartphones?
OLED
LCD + Digitizer
TFT
Plasma
What is the first step before performing cold testing on a mobile PCB?
Power on the device
Disconnect the battery
Apply flux
Heat the board
Which tool is used to safely remove moisture from water-damaged components?
Vinegar
IPA (Isopropyl Alcohol)
Petrol
WD-40
What does the term "boot loop" refer to in mobile servicing?
Battery overheating
Continuous restart cycle
Display flickering
Charging failure
56. Which safety tool prevents electrostatic damage during servicing?
Rubber gloves
Anti-static wrist strap
Metal tweezers
Cotton cloth
What does the GR test help determine?
Battery health
Component status: Good or Replace
Display brightness
Charging speed
Which component is responsible for managing mobile data and signal strength?
PMIC
RF transceiver
Digitizer
Speaker
What is the function of the proximity sensor?
Detects light intensity
Turns off screen during calls
Measures battery voltage
Controls vibration motor
Which issue is most likely if the phone doesn't vibrate during notifications?
Display fault
Vibration motor failure
Battery swelling
Charging port damage
What is the role of the gyroscope in smartphones?
Detects light
Measures battery voltage
Detects orientation and rotation
Controls audio output
Which tool is used to remove solder from a PCB?
Flux paste
Desoldering pump
Multimeter
Screwdriver
What is the purpose of step-by-step photo documentation during repair?
To advertise the repair
To avoid misplacing screws and parts
To clean the board
To test battery voltage
Which fault is diagnosed by checking the flashlight and mic?
Display fault
Audio fault
Peripheral fault
Charging fault
What does a Liquid Damage Indicator (LDI) look like when exposed to moisture?
White
Red or pink
Blue
Green
Which tool is used for precision soldering of small components?
Hot air gun
Soldering iron with fine tip
Screwdriver
Flux brush
What is the function of the receiver in a mobile phone?
Converts sound to signal
Outputs sound during calls
Detects touch
Charges the battery
Which fault is most likely if the phone doesn't respond to touch?
Battery fault
Digitizer failure
RF circuit issue
Speaker damage
What is the role of the PMIC in mobile devices?
Controls display
Manages power distribution
Amplifies sound
Detects orientation
Which section of the motherboard contains the RF amplifier and filters?
Charging section
RF section
Display section
Audio section
