Maintenance And Troubleshooting In Automobile — Part 1 MCQs with Explanations
Practice high-yield Automobile Engineering MCQs on Maintenance And Troubleshooting In Automobile — Part 1 with worked academic solutions for PPSC, FPSC, Transport Dept.
Questions
40
Difficulty Level
Exam-Level
Target Exams
PPSC, FPSC, Transport Dept
Estimated Time
48 mins
Exam-Level PPSC FPSC Transport Dept
Verified for Commission Syllabus • Oct 14, 2026
40
Verified Practice Questions
Interactive test mode with detailed academic worked solutions
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🎉 Set complete! All 40 questions answered.
Question 1 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Breakdown maintenance is done when
Correct Answer: Option A — After breakdown
Detailed Academic Explanation:
After breakdown is the correct answer to “Breakdown maintenance is done when”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 2 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Accident chance is minimized in
Correct Answer: Option A — Preventive maintenance
Detailed Academic Explanation:
Preventive maintenance is the correct answer to “Accident chance is minimized in”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 3 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Preventive maintenance is
Correct Answer: Option A — The overall lubrication and repair work carried out by the maintenance section in advance of the machine coming to breakdown
Detailed Academic Explanation:
The overall lubrication and repair work carried out by the maintenance section in advance of the machine coming to breakdown is the correct answer to “Preventive maintenance is”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 4 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The type of bearing most commonly used for main bearings and connecting rod bearings is
Correct Answer: Option B — Plain bearing
Detailed Academic Explanation:
Plain bearing is the correct answer to “The type of bearing most commonly used for main bearings and connecting rod bearings is”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 5 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The correct way to measure a camshaft's total runout dimension is to
Correct Answer: Option B — Support the journal at each end of the camshaft in a V-block, then rotate the camshaft and measure the total runout dimension using a dial indicator
Detailed Academic Explanation:
Support the journal at each end of the camshaft in a V-block, then rotate the camshaft and measure the total runout dimension using a dial indicator is the correct answer to “The correct way to measure a camshaft's total runout dimension is to”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 6 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Humming noise in the differential is due to improper tooth contact between
Correct Answer: Option A — Drive pinion and ring gear
Detailed Academic Explanation:
Drive pinion and ring gear is the correct answer to “Humming noise in the differential is due to improper tooth contact between”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 7 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which piston ring wears faster than the other ring?
Correct Answer: Option A — Top compression ring
Detailed Academic Explanation:
Top compression ring is the correct answer to “Which piston ring wears faster than the other ring”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 8 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which one of the following instruments should be used to measure the outside diameter of a rocker shaft?
Correct Answer: Option B — Micrometer
Detailed Academic Explanation:
Micrometer is the correct answer to “Which one of the following instruments should be used to measure the outside diameter of a rocker shaft”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 9 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Removing the glaze from cylinder walls before installing new piston rings helps avoid . . . . . . . .
Correct Answer: Option D — Slow seating of the piston rings
Detailed Academic Explanation:
Slow seating of the piston rings is the correct answer to “Removing the glaze from cylinder walls before installing new piston rings helps avoid . . . . . . . .”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 10 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Back-fire can take place
Correct Answer: Option A — In both the intake and exhaust manifolds
Detailed Academic Explanation:
In both the intake and exhaust manifolds is the correct answer to “Back-fire can take place”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 11 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Toremove cylinder liners from engine block, use
Correct Answer: Option A — Wooden hammer and chisel
Detailed Academic Explanation:
Wooden hammer and chisel is the correct answer to “Toremove cylinder liners from engine block, use”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 12 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
There is no effect on delivery time in . . . . . . . .
Correct Answer: Option B — Preventive maintenance
Detailed Academic Explanation:
Preventive maintenance is the correct answer to “There is no effect on delivery time in . . . . . . . .”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 13 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
A blocked air filter may cause
Correct Answer: Option B — The engine to run rich
Detailed Academic Explanation:
The engine to run rich is the correct answer to “A blocked air filter may cause”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 14 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which one of the following is possible cause of insufficient oil pressure?
Correct Answer: Option D — All are correct
Detailed Academic Explanation:
All are correct is the correct answer to “Which one of the following is possible cause of insufficient oil pressure”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 15 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Approximate values of crankshaft run out and wear limit of clutch plates, generally lie within:
Correct Answer: Option A — 0.03 mm, 0.3 mm
Detailed Academic Explanation:
0.03 mm, 0.3 mm is the correct answer to “Approximate values of crankshaft run out and wear limit of clutch plates, generally lie within:”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 16 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Worn-out piston rings cause 1. Excessive oil consumption 2. Loss of power 3. Loss of torque 4. Loss of compression
Correct Answer: Option C — All are correct
Detailed Academic Explanation:
All are correct is the correct answer to “Worn-out piston rings cause 1. Excessive oil consumption 2. Loss of power 3. Loss of torque 4. Loss of compression”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 17 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the possible cause when hom will not sound off?
Correct Answer: Option D — All are correct
Detailed Academic Explanation:
All are correct is the correct answer to “What is the possible cause when hom will not sound off”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 18 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
If the extent of out-of-roundness or taper exceeds the specified limit on only one crankshaft journal then,
Correct Answer: Option D — Replace crankshaft with a new one
Detailed Academic Explanation:
Replace crankshaft with a new one is the correct answer to “If the extent of out-of-roundness or taper exceeds the specified limit on only one crankshaft journal then,”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 19 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
When servicing an air cleaner, the filter element should be
Correct Answer: Option D — Replaced
Detailed Academic Explanation:
Replaced is the correct answer to “When servicing an air cleaner, the filter element should be”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 20 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
When the car is being lifted for servicing
Correct Answer: Option D — All of the above
Detailed Academic Explanation:
All of the above is the correct answer to “When the car is being lifted for servicing”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 21 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The type of problem suspected when a cylinder has an excessive degree of compression is
Correct Answer: Option B — Excess accumulation of carbon on the piston head or cylinder head
Detailed Academic Explanation:
Excess accumulation of carbon on the piston head or cylinder head is the correct answer to “The type of problem suspected when a cylinder has an excessive degree of compression is”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 22 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The cam angle for prestolite is
Correct Answer: Option A — 42°
Detailed Academic Explanation:
42° is the correct answer to “The cam angle for prestolite is”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 23 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Tar spots from a car body are removed by
Correct Answer: Option C — Special cleaning agents
Detailed Academic Explanation:
Special cleaning agents is the correct answer to “Tar spots from a car body are removed by”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 24 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The spark plugs gap for making MICO or KLG is-
Correct Answer: Option A — 0.76 mm
Detailed Academic Explanation:
0.76 mm is the correct answer to “The spark plugs gap for making MICO or KLG is-”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 25 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the possible cause of faulty meter iridication?
Correct Answer: Option D — All are correct
Detailed Academic Explanation:
All are correct is the correct answer to “What is the possible cause of faulty meter iridication”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 26 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
When a connecting rod's end play measurement exceeds the specified limit, the action that must be taken first is
Correct Answer: Option A — Replace the connecting rod with a new one
Detailed Academic Explanation:
Replace the connecting rod with a new one is the correct answer to “When a connecting rod's end play measurement exceeds the specified limit, the action that must be taken first is”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 27 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
When the crankshaft's end play measurement exceeds the specified limit, the action that must be taken first is
Correct Answer: Option C — Replace the thrust washer with a new one
Detailed Academic Explanation:
Replace the thrust washer with a new one is the correct answer to “When the crankshaft's end play measurement exceeds the specified limit, the action that must be taken first is”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 28 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Why are the pistons usually given a coating (e.g. tin coating)?
Correct Answer: Option D — To reduce possibility of scoring
Detailed Academic Explanation:
To reduce possibility of scoring is the correct answer to “Why are the pistons usually given a coating (e.g. tin coating)”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 29 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the possible cause of steering noise?
Correct Answer: Option D — All are correct
Detailed Academic Explanation:
All are correct is the correct answer to “What is the possible cause of steering noise”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 30 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Engine turns over slowly but does not start what is its possible cause?
Correct Answer: Option C — Both are correct
Detailed Academic Explanation:
Both are correct is the correct answer to “Engine turns over slowly but does not start what is its possible cause”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 31 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which of the following causes is for engine vibrations?
Correct Answer: Option D — All are correct
Detailed Academic Explanation:
All are correct is the correct answer to “Which of the following causes is for engine vibrations”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 32 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the possible cause when fuel meter gives no indication?
Correct Answer: Option C — Both
Detailed Academic Explanation:
Both is the correct answer to “What is the possible cause when fuel meter gives no indication”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 33 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
A reading of what specific gravity indicate a fully charged condition-
Correct Answer: Option B — 1.220 to 1.230
Detailed Academic Explanation:
1.220 to 1.230 is the correct answer to “A reading of what specific gravity indicate a fully charged condition-”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 34 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The first stage of preventive maintenance is
Correct Answer: Option A — Inspection
Detailed Academic Explanation:
Inspection is the correct answer to “The first stage of preventive maintenance is”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 35 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Painting cracks occur due to
Correct Answer: Option A — Thin layer of paint
Detailed Academic Explanation:
Thin layer of paint is the correct answer to “Painting cracks occur due to”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 36 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
When the oil clearance is out of specification,
Correct Answer: Option D — Select the appropriate new bearing
Detailed Academic Explanation:
Select the appropriate new bearing is the correct answer to “When the oil clearance is out of specification,”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 37 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
A warped pressure plate should be:
Correct Answer: Option C — Replaced
Detailed Academic Explanation:
Replaced is the correct answer to “A warped pressure plate should be:”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 38 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is the possible cause if the engine overheats?
Correct Answer: Option D — All are correct
Detailed Academic Explanation:
All are correct is the correct answer to “What is the possible cause if the engine overheats”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 39 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
When the vehicle's starter will not run then its possible cause is-
Correct Answer: Option D — All are correct
Detailed Academic Explanation:
All are correct is the correct answer to “When the vehicle's starter will not run then its possible cause is-”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
Question 40 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The violent sound pulsations within the cylinder of an I. C. Engine are due to
Correct Answer: Option A — Detonation
Detailed Academic Explanation:
Detonation is the correct answer to “The violent sound pulsations within the cylinder of an I. C. Engine are due to”. This question is standard in competitive examination syllabi for Maintenance And Troubleshooting In Automobile.
💡Key Conceptual Anchor:Maintenance And Troubleshooting In Automobile
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Air Pollution And Its Control In Automobile — Part 1
Master the next curriculum module with 40 exam-standard MCQs.
In competitive commission exams (FPSC, PPSC, KPPSC, SPSC, CSS, PMS), questions are frequently phrased with distractor options designed to catch rote learners. Whenever you answer an MCQ, read the Detailed Academic Explanation and Conceptual Anchor to understand why the remaining options are incorrect.