Maintenance Engineering MCQs 2026

Calibration maintenance of instruments ensures

1. A measurement accuracy for control and safety ✓
2. B only cosmetic dial glass clean ✓
3. C only increasing random error ✓
4. D only removing labels ✓

Maintenance engineering aims to

1. A maximize equipment availability and reliability at optimal cost ✓
2. B maximize breakdown frequency ✓
3. C eliminate all inspections ✓
4. D ignore spare parts ✓

Breakdown maintenance (corrective) is

1. A scheduled before any fault signs ✓
2. B repair after failure occurs ✓
3. C only predictive with sensors always ✓
4. D only redesign ✓

Preventive maintenance (PM) is performed

1. A only after catastrophic failure ✓
2. B on scheduled time or usage intervals ✓
3. C only when operator guesses ✓
4. D never documented ✓

Predictive maintenance (PdM) uses

1. A condition monitoring to predict failure before breakdown ✓
2. B only fixed calendar without measurement ✓
3. C only run-to-failure always ✓
4. D only painting equipment ✓

Reliability-centered maintenance (RCM) analyzes

1. A only aesthetic painting schedule ✓
2. B only office cleaning ✓
3. C failure modes and consequences to choose maintenance tasks ✓
4. D only marketing plan ✓

MTBF (Mean Time Between Failures) measures

1. A only repair duration ✓
2. B only calendar year length ✓
3. C only operator shift hours payroll ✓
4. D average operating time between failures for repairable items ✓

MTTR (Mean Time To Repair) measures

1. A time between failures ✓
2. B machine design life only ✓
3. C warranty period only ✓
4. D average time to restore equipment after failure ✓

Availability A = MTBF / (MTBF + MTTR) represents

1. A only quality defect rate ✓
2. B only inventory turns ✓
3. C proportion of time equipment is operable ✓
4. D only profit margin ✓

TPM (Total Productive Maintenance) involves

1. A operators and maintenance staff improving equipment effectiveness ✓
2. B only external contractors exclusively ✓
3. C only top management memos ✓
4. D only selling old machines ✓

OEE in maintenance context reflects

1. A only office attendance ✓
2. B equipment losses from availability, performance and quality ✓
3. C only fuel import cost ✓
4. D only river flow ✓

Vibration analysis detects

1. A only chemical pH of coolant ✓
2. B bearing defects, imbalance and misalignment early ✓
3. C only paint colour fading ✓
4. D only room humidity office ✓

Infrared thermography in PdM finds

1. A abnormal hot spots in electrical and mechanical equipment ✓
2. B only internal cracks without surface temperature change always ✓
3. C only sound frequency ✓
4. D only weight of part ✓

Oil analysis (wear debris, viscosity) indicates

1. A only external paint rust only ✓
2. B only operator skill ✓
3. C internal machine wear and contamination ✓
4. D only belt colour ✓

Ultrasonic testing in maintenance listens for

1. A only visible light colour ✓
2. B only DC voltage only ✓
3. C only room temperature only ✓
4. D high-frequency leaks and bearing defects ✓

Lubrication purpose in machinery is to

1. A increase friction deliberately always ✓
2. B only clean exterior paint ✓
3. C only increase electrical resistance ✓
4. D reduce friction, wear and heat between surfaces ✓

Grease versus oil lubrication: grease suits

1. A only high-speed turbine bearings always needing flow ✓
2. B only open gears needing bath always ✓
3. C sealed-for-life bearings and hard-to-reach points ✓
4. D only hydraulic systems ✓

Lubrication schedule too infrequent causes

1. A accelerated wear and overheating ✓
2. B infinite bearing life ✓
3. C lower temperature always beneficial ✓
4. D zero friction ✓

Alignment of coupled shafts prevents

1. A only improves paint adhesion ✓
2. B vibration, bearing wear and coupling failure ✓
3. C only electrical power factor ✓
4. D only water hardness ✓

Balancing rotating parts reduces

1. A only electrical harmonics without rotation ✓
2. B vibration forces on bearings and structure ✓
3. C only static weight of base ✓
4. D only oil viscosity ✓

Spare parts inventory ABC in maintenance prioritizes

1. A critical infrequent high-value parts differently than consumables ✓
2. B only alphabetical part numbers ✓
3. C only paint colours ✓
4. D only supplier logos ✓

Bills of materials for maintenance links

1. A only employee birthdays ✓
2. B only cricket scores ✓
3. C parts to equipment assemblies for planning ✓
4. D only weather forecast ✓

Work order in CMMS documents

1. A only sales invoice to customer ✓
2. B only university transcript ✓
3. C only passport application ✓
4. D maintenance task, labour, parts and completion status ✓

CMMS stands for

1. A Central Motor Monitoring Standard ✓
2. B Compressed Maintenance Manual Set ✓
3. C Chemical Material Management System ✓
4. D Computerized Maintenance Management System ✓

Root cause failure analysis (RCFA) in maintenance seeks

1. A only temporary patch without investigation ✓
2. B only blame operator without data ✓
3. C underlying cause of repeated failures ✓
4. D only increase spare cost ✓

Failure mode effects analysis (FMEA) ranks

1. A severity, occurrence and detection of failure modes ✓
2. B only paint gloss ✓
3. C only office carpet colour ✓
4. D only canteen menu ✓

Condition-based maintenance triggers work when

1. A only calendar date regardless of condition ✓
2. B monitored parameter exceeds threshold ✓
3. C only random choice ✓
4. D only machine colour changes ✓

Run-to-failure strategy acceptable for

1. A nuclear safety valve exclusively ✓
2. B low-cost non-critical redundant items ✓
3. C aircraft engine turbine blades ✓
4. D high-pressure boiler safety ✓

Overhaul versus repair: overhaul is

1. A comprehensive restoration to near-new condition ✓
2. B only tightening one bolt ✓
3. C only wiping exterior dust ✓
4. D only changing label ✓

Wear-out zone on bathtub failure curve shows

1. A decreasing failures always ✓
2. B constant zero failures ✓
3. C increasing failure rate at end of life ✓
4. D only infant mortality ✓

Infant mortality failures often due to

1. A only end-of-life wear ✓
2. B only random stable period always ✓
3. C only proper commissioning ✓
4. D installation errors, defects or burn-in needs ✓

Reliability block diagram models

1. A only financial accounting ledger ✓
2. B only soil chemistry ✓
3. C only textile weave pattern ✓
4. D system reliability from component reliabilities ✓

Weibull analysis in reliability uses

1. A only colour matching paint ✓
2. B only musical rhythm ✓
3. C failure time data to characterize distribution ✓
4. D only inventory ABC only ✓

Planning shutdown turnaround maintenance

1. A coordinates major inspection and overhaul during planned outage ✓
2. B only surprise breakdown always ✓
3. C only during peak production always ✓
4. D only without permits ✓

Permit-to-work system ensures

1. A anyone enters vessel freely ✓
2. B hazardous maintenance tasks controlled and authorized ✓
3. C no lockout needed ever ✓
4. D only verbal OK without record ✓

Lockout-tagout (LOTO) prevents

1. A only improves motor speed ✓
2. B accidental energization during maintenance ✓
3. C only lubricates bearings ✓
4. D only cleans filters ✓

Bearing failure modes include

1. A spalling, brinelling, fretting and lubrication failure ✓
2. B only improved roundness always ✓
3. C only lower temperature always beneficial unlimited ✓
4. D only magnetic levitation always ✓

Belt drive maintenance includes

1. A only increasing misalignment ✓
2. B only removing guards permanently ✓
3. C tension check and alignment inspection ✓
4. D only over-tension until snap ✓

Chain drive lubrication and tension prevent

1. A only electrical arcing ✓
2. B only water hammer ✓
3. C only boiler scale ✓
4. D premature elongation and sprocket wear ✓

Corrosion under insulation (CUI) is managed by

1. A only ignoring insulation exterior ✓
2. B only increasing moisture trapping ✓
3. C only removing all inspection ✓
4. D inspection ports, coatings and moisture barriers ✓

NDT during maintenance turnaround may include

1. A only visual from 100 m distance only ✓
2. B only weighing crane hook ✓
3. C UT, RT and MPI on critical welds ✓
4. D only colour survey ✓

Energy audit in maintenance context finds

1. A only cricket energy scores ✓
2. B waste in compressed air leaks and inefficient drives ✓
3. C only social media usage ✓
4. D only paper clip inventory ✓

Reliability KPI for plant may track

1. A only canteen meal count ✓
2. B number of unplanned shutdowns per year ✓
3. C only parking slots ✓
4. D only font size on reports ✓

Maintenance budget includes

1. A labour, spares, contractors and tools ✓
2. B only marketing advertising exclusively ✓
3. C only raw material purchase for production exclusively without MRO ✓
4. D only dividends to shareholders exclusively ✓

Skills matrix for maintenance team tracks

1. A only shoe sizes ✓
2. B only blood groups for medical only unrelated ✓
3. C competencies per trade and equipment type ✓
4. D only vehicle license plates ✓

Autonomous maintenance step in TPM has operators

1. A only external agency exclusively always ✓
2. B only discard all tools ✓
3. C only increase breakdowns ✓
4. D clean, inspect and lubricate their machines ✓

Five whys in maintenance investigation asks

1. A only one question always sufficient ✓
2. B only who to blame without analysis ✓
3. C only when to sell machine ✓
4. D successive why to reach root cause ✓

Pakistan industrial maintenance in textiles and cement faces challenges of

1. A unlimited automatic zero downtime always ✓
2. B no need for lubrication ever ✓
3. C skill shortage, spare lead time and energy cost ✓
4. D only manual typewriters ✓

Predictive maintenance adoption in Pakistan is growing with

1. A vibration sensors and CMMS in larger plants ✓
2. B zero technology use nationwide ✓
3. C only paper logs exclusively forever all plants ✓
4. D only outsourced foreign operators exclusively always ✓

Safety in maintenance work on Pakistani factory floor requires

1. A no helmets to save cost always ✓
2. B PPE, LOTO and compliance with labour safety regulations ✓
3. C ignore confined space rules ✓
4. D hot work without fire watch ✓