New Curriculum Third Term Computer Hardware and GSM Repairs examination for SS 1

Class: SSS 1
Term: Third Term
Subject: Computer Hardware and GSM Repairs
Time: 1 hour 30 minutes
Total Marks: 70

SECTION A: OBJECTIVES (40 MARKS)
Instruction: Answer ALL 40 questions. Each carries 1 mark.

1. All of these support a reliable simple repair except ________. (a) documenting the repair and replaced part   (b) visual inspection of suspected damage   (c) replacing several unrelated components without identifying a fault   (d) functional tests before and after work
2. Which of these conclusions is NOT justified solely because a handset will not switch on? (a) That the battery has charge   (b) That its processor is permanently damaged   (c) That the charger is connected   (d) That the power button is functional
3. The main reason to disconnect the battery before replacing a screen connector is ________. (a) to update the camera software   (b) to reduce the risk of short-circuit damage during handling   (c) to increase the resolution of the new screen   (d) to clear the network bill
4. A multimeter was signed out for Job A but returned damaged. Which record most effectively establishes accountability? (a) An inventory list without borrower details   (b) A purchase order for new measuring equipment   (c) A tool register showing user, date, condition on issue and return   (d) A completed job invoice without tool issue data
5. The main advantage of detailed job cards in a repair enterprise is ________. (a) traceability of faults, authorisations, parts and charges   (b) elimination of every diagnostic mistake   (c) removal of all customer privacy responsibilities   (d) automatic creation of replacement parts
6. A screen shows visible vertical lines after a drop, while touch input remains functional. Which conclusion is most defensible? (a) The display path may be damaged although touch sensing still works   (b) All screen functions must share one intact connection   (c) A network unlock will restore the display   (d) The SIM card is necessarily damaged
7. The ________ is the appropriate component to investigate when voice notes contain silence but downloaded audio plays normally. (a) SIM tray cover   (b) earpiece output only   (c) microphone and its input path   (d) display backlight
8. A graduate wants to establish a small repair service. Which activity first converts technical competence into a viable business plan? (a) Ignoring customer records and warranties   (b) Buying every advertised tool without a budget   (c) Charging identical prices for every job without diagnosis   (d) Estimating likely demand, start-up cost and expected service income
9. Which of these is NOT a legitimate tool-usage record entry? (a) The tool identifier and job number   (b) The technician's personal entertainment preference   (c) The condition after use   (d) The time of issue and return
10. A repair shop repeatedly runs out of charging ports. Which inventory response addresses the underlying problem? (a) avoid recording the number of ports used   (b) purchase only after every customer has left   (c) maintain a usage-based stock record and sensible reorder point   (d) store incompatible parts together without labels
11. Which behaviour is NOT characteristic of a trustworthy repair entrepreneur? (a) Obtaining customer approval for replacement costs   (b) Using a customer's private files without permission   (c) Protecting devices from accidental damage   (d) Giving a clear service receipt
12. A customer wants a handset returned urgently, but a safety test is incomplete. The correct professional action is ________. (a) mark the repair certificate as passed   (b) explain the risk and finish necessary checks before release   (c) skip safety checks to improve customer satisfaction   (d) conceal the unfinished test
13. During reassembly, the main purpose of following a component and screw map is ________. (a) to discharge the battery more rapidly   (b) to change the phone's operating system   (c) to increase the mobile network signal   (d) to prevent misplaced fasteners and damaged connectors
14. A computer repeatedly restarts after displaying a memory-related diagnostic warning. Which investigation is most targeted? (a) the charging-adapter output alone   (b) the system SSD capacity alone   (c) the display cable resistance alone   (d) RAM seating, compatibility and basic memory tests
15. Two adjacent phone keys do not respond; the others work. Where should diagnosis begin? (a) the SIM contacts and network registration   (b) the keypad contact area and related connection   (c) the earpiece speaker path   (d) the charging controller and supply rail
16. Which record best connects the quantity of a spare part in stock with its cost? (a) A customer work order without quantities   (b) A repair invoice without stock receipts   (c) A vendor catalogue with no issue record   (d) A dated inventory ledger with receipts, issues and unit prices
17. A phone is submitted with intermittent charging. What must the technician do before opening the handset? (a) erase the customer's storage without consent   (b) remove every circuit component   (c) bridge charging contacts to create a spark   (d) document symptoms and isolate external power
18. The correct step when a consumable reaches its reorder point is ________. (a) conceal all outstanding issues   (b) buy an unrelated tool automatically   (c) verify recorded balance and initiate an approved replenishment request   (d) discard the stock register
19. A repair business has revenue of ₦180,000 and direct operating expenses of ₦135,000 for a month. Its operating surplus before any further costs is ________. (a) ₦315,000   (b) ₦135,000   (c) ₦45,000   (d) ₦55,000
20. A phone charges from one cable but not from another. What is the most economical initial diagnosis? (a) Replace the entire processor immediately   (b) Test the faulty cable and connector before opening the phone   (c) Replace the earpiece first   (d) Install unrelated firmware
21. After fitting a known-good speaker, distortion continues. The next rational step is to ________. (a) reinstall the network settings before testing audio   (b) replace the screen controller without diagnosis   (c) inspect the speaker contacts and related audio circuit   (d) replace the battery without checking its voltage
22. A technician used two units from a stock of eight; a delivery of five then arrived. The closing stock is ________. (a) 5 units   (b) 15 units   (c) 6 units   (d) 11 units
23. Why can quoting a fixed repair fee before diagnosing a device expose a small business to a loss? (a) all customers require identical repairs   (b) technicians are forbidden to charge for labour   (c) every device will always require no parts   (d) the actual labour and replacement-part costs may exceed the estimate
24. A technician notes that a PC has power indicators but no boot display. Which action follows structured fault-finding? (a) Replace the motherboard without testing   (b) Check display connection, power and hardware diagnostic indicators systematically   (c) Skip inspection and issue an invoice   (d) Install a random mobile application
25. An earpiece produces distorted speech but the loudspeaker plays music normally. Which repair target best matches the evidence? (a) The external speaker alone   (b) The charger cable   (c) The earpiece or its connection   (d) The phone's memory card
26. A customer disagrees with a repair diagnosis. Which response best demonstrates professional integrity? (a) Explain the evidence, alternatives and limits of the test without concealing uncertainty   (b) Discard the device without discussing it   (c) Promise a repair that has not been assessed   (d) Invent a fault to justify a larger bill
27. ________ provides a practical basis for earning repeat business in GSM repair services. (a) Unrecorded part substitutions   (b) Consistent diagnosis, transparent pricing and reliable workmanship   (c) Guaranteed repairs without any inspection   (d) Unapproved access to customer accounts
28. All of these belong in a basic repair-enterprise feasibility check except ________. (a) the owner's favourite screen wallpaper   (b) availability of compatible spare parts   (c) access to safe workspace and tools   (d) likely local customer demand
29. A replacement component is fitted but the phone will not start. Which check is most defensible before condemning the component? (a) Confirm that its connector is correctly seated and power is available   (b) Increase the charger voltage arbitrarily   (c) Assume the mainboard has failed without measurement   (d) Disable all device protections
30. The strongest reason for documenting an error code exactly is ________. (a) it guarantees the reported component is faulty   (b) it helps link symptoms to a reproducible diagnostic path   (c) it proves the customer's password   (d) it avoids the need for all physical inspection
31. A repairer purchased 10 connectors but issued 6 on recorded jobs. Excluding other movements, the closing quantity is ________. (a) 10 connectors   (b) 16 connectors   (c) 4 connectors   (d) 6 connectors
32. A charging indicator drops whenever the plug is moved, despite a good battery and charger. Which fault hypothesis fits? (a) a full phone contact list   (b) an incorrect clock date   (c) a loose or damaged charging port connection   (d) a permanently damaged camera sensor
33. Which of the following observations best distinguishes a ROM-related firmware issue from a simple display fault? (a) Firmware or boot diagnostics indicate corruption while the display hardware tests normally   (b) A wall socket is switched off   (c) The SIM network has weak coverage outdoors   (d) Only the screen glass has a visible scratch
34. A customer hears calls through a headset but not through the built-in earpiece. Which conclusion is best supported? (a) the audio path to the earpiece needs inspection   (b) all microphone functions have failed   (c) the charging circuit is open   (d) the SIM contains corrupted contact names
35. Three screen parts cost ₦7,500 each and four charging ports cost ₦1,250 each. The total purchase cost is ________. (a) ₦31,250   (b) ₦22,500   (c) ₦28,750   (d) ₦27,500
36. A technician receives a contract for twenty school computers. Which method best supports traceable service delivery? (a) record the condition, work and outcome for each device   (b) ignore the agreed service specification   (c) issue one unitemised receipt with no device identifiers   (d) repair only the easiest devices but bill for all
37. A technician discovers data unrelated to the repair task. The appropriate professional duty is to ________. (a) protect the customer's privacy and avoid accessing the files   (b) delete the files without agreement   (c) copy the files to attract more customers   (d) share the content with colleagues
38. While measuring a phone supply rail, the meter displays zero volts. Which additional step is essential before declaring the circuit defective? (a) Remove the phone's protection circuitry   (b) Use the current jack across the battery terminals   (c) Confirm the reference ground, range and expected operating state   (d) Assume every connected component has shorted
39. A phone plays sounds but the display glass is broken. Which plan best controls compatibility and assembly risks? (a) replacing the microphone regardless of symptoms   (b) rewriting the SIM identity   (c) connecting the battery backward to test the screen   (d) confirming display compatibility and testing the replacement before final sealing
40. A repair service receives repeated complaints that replaced screens fail quickly. Which business response is most justified? (a) Stop recording customer complaints   (b) Review parts sourcing, installation quality and post-repair testing   (c) Charge every customer for the same fault twice   (d) Advertise a lifetime warranty without investigation

SECTION B: THEORY (30 MARKS)
Instruction: Answer Question 1 and any other TWO questions. Each question carries 10 marks.

Question 1
(a) A dropped phone shows vertical lines on its display but continues to play notification sounds. Describe a fault-isolation plan before replacing the mainboard. (6 marks)
(b) Give two checks that prevent a reassembly fault. (4 marks)

Question 2
(a) An earpiece is silent but audio works through headphones. Identify two plausible causes and corresponding tests. (4 marks)
(b) Outline three safeguards when measuring phone voltage using a multimeter. (6 marks)

Question 3
(a) A workshop earned ₦180,000 from services and spent ₦135,000 in direct expenses. Calculate the provisional surplus. (3 marks)
(b) Explain why a repair entrepreneur needs accurate estimates, customer consent and traceable job cards. (7 marks)

Question 4
(a) A store has 12 charging ports. Four are used and six new ones arrive. Calculate the closing stock. (3 marks)
(b) Design a seven-mark spare-parts and tool-control system for a small repair business. (7 marks)

Objective Marking Scheme
Question 1 – ✅ (c) replacing several unrelated components without identifying a fault
Question 2 – ✅ (b) That its processor is permanently damaged
Question 3 – ✅ (b) to reduce the risk of short-circuit damage during handling
Question 4 – ✅ (c) A tool register showing user, date, condition on issue and return
Question 5 – ✅ (a) traceability of faults, authorisations, parts and charges
Question 6 – ✅ (a) The display path may be damaged although touch sensing still works
Question 7 – ✅ (c) microphone and its input path
Question 8 – ✅ (d) Estimating likely demand, start-up cost and expected service income
Question 9 – ✅ (b) The technician's personal entertainment preference
Question 10 – ✅ (c) maintain a usage-based stock record and sensible reorder point
Question 11 – ✅ (b) Using a customer's private files without permission
Question 12 – ✅ (b) explain the risk and finish necessary checks before release
Question 13 – ✅ (d) to prevent misplaced fasteners and damaged connectors
Question 14 – ✅ (d) RAM seating, compatibility and basic memory tests
Question 15 – ✅ (b) the keypad contact area and related connection
Question 16 – ✅ (d) A dated inventory ledger with receipts, issues and unit prices
Question 17 – ✅ (d) document symptoms and isolate external power
Question 18 – ✅ (c) verify recorded balance and initiate an approved replenishment request
Question 19 – ✅ (c) ₦45,000
Question 20 – ✅ (b) Test the faulty cable and connector before opening the phone
Question 21 – ✅ (c) inspect the speaker contacts and related audio circuit
Question 22 – ✅ (d) 11 units
Question 23 – ✅ (d) the actual labour and replacement-part costs may exceed the estimate
Question 24 – ✅ (b) Check display connection, power and hardware diagnostic indicators systematically
Question 25 – ✅ (c) The earpiece or its connection
Question 26 – ✅ (a) Explain the evidence, alternatives and limits of the test without concealing uncertainty
Question 27 – ✅ (b) Consistent diagnosis, transparent pricing and reliable workmanship
Question 28 – ✅ (a) the owner's favourite screen wallpaper
Question 29 – ✅ (a) Confirm that its connector is correctly seated and power is available
Question 30 – ✅ (b) it helps link symptoms to a reproducible diagnostic path
Question 31 – ✅ (c) 4 connectors
Question 32 – ✅ (c) a loose or damaged charging port connection
Question 33 – ✅ (a) Firmware or boot diagnostics indicate corruption while the display hardware tests normally
Question 34 – ✅ (a) the audio path to the earpiece needs inspection
Question 35 – ✅ (d) ₦27,500
Question 36 – ✅ (a) record the condition, work and outcome for each device
Question 37 – ✅ (a) protect the customer's privacy and avoid accessing the files
Question 38 – ✅ (c) Confirm the reference ground, range and expected operating state
Question 39 – ✅ (d) confirming display compatibility and testing the replacement before final sealing
Question 40 – ✅ (b) Review parts sourcing, installation quality and post-repair testing

Theory Marking Scheme
Question 1
(a) Document symptoms (1), assess display/touch independently (1), disconnect power safely (1), inspect connector/visible damage (1), compare with compatible known-good display or diagnostic (1), verify and record outcome (1). [6 marks]
(b) Correct connector seating (2); account for labelled screws and cable routing before closing (2). [4 marks]
Question 2
(a) Earpiece defect -> known-good earpiece test (2); loose/broken audio path -> inspect/measure contact/connection (2). [4 marks]
(b) Award 2 each: correct DC-voltage range/jacks, correct verified ground, avoid shorts with insulated probes, powered-state awareness, compare with manufacturer range, record readings. [6 marks]
Question 3
(a) ₦180,000 − ₦135,000 = ₦45,000 (3). [3 marks]
(b) Cost estimates protect margins and inform quote (2); consent protects customer authorisation and privacy (2); job cards trace fault, tests, parts, dates, work and outcomes (3). [7 marks]
Question 4
(a) 12 − 4 + 6 = 14 ports (3). [3 marks]
(b) Award 1 each: record item ID/description; opening balance; dated receipts; issues by job number; unit price; closing quantity/reorder point; tools sign-out/return condition. [7 marks]