22 Maintenance Awareness Practice Questions & Answers
Every Maintenance Awareness practice question from the Production Technician Practice Test, with the correct answer and a short explanation.
Start practice test →1. Which activity is an example of predictive (condition-based) maintenance?
- A.Rebuilding a gearbox during the annual plant shutdown
- B.Replacing a motor only after it has failed in service
- C.Trending monthly vibration readings taken on a pump✓ Answer
- D.Greasing a conveyor bearing on a fixed hour-based schedule
Predictive maintenance measures an actual condition indicator — vibration, temperature, oil condition, ultrasound — and trends it so degradation is detected while the machine still runs. Fixed-interval greasing and shutdown rebuilds are preventive (time-based) work, and changing a motor after it fails is reactive.
Source: MSSC Production Standards, Maintenance Awareness — preventive versus predictive maintenance strategiesReport a problem with this question
2. Compared with running equipment until it breaks, what is the main advantage of a scheduled preventive maintenance program?
- A.It turns unplanned breakdowns into planned downtime✓ Answer
- B.It guarantees that no component will ever fail in service
- C.It removes the need for any spare-parts inventory
- D.It ends the need for operators to inspect machines daily
Preventive work is done before failure, so the stop is scheduled at a convenient time with parts, tools and labor already staged, which makes downtime shorter and prevents the secondary damage a breakdown causes. It does not abolish failures, spare parts or daily operator inspection.
Source: MSSC Production Standards, Maintenance Awareness — perform preventive maintenance and routine repairReport a problem with this question
3. In a total productive maintenance program, what does autonomous maintenance mean?
- A.Machines diagnose themselves and order their own spare parts
- B.The maintenance department alone performs all equipment care
- C.An outside contractor carries out all scheduled maintenance
- D.Operators do routine cleaning, inspection, lubrication and tightening✓ Answer
Autonomous maintenance transfers basic equipment care to the person who runs the machine, because that operator notices small changes first. Cleaning doubles as inspection — wiping a machine down is how leaks, loose fasteners and worn belts get found — while skilled technicians are freed for repairs beyond the operator's authority.
Source: MSSC Production Standards, Maintenance Awareness — Total Productive Maintenance principles, autonomous maintenanceReport a problem with this question
4. A preventive maintenance task on a press comes due, but the line is behind schedule. What should the technician do?
- A.Sign the checklist now and do the work when time allows
- B.Do only the steps possible while the press keeps running
- C.Tell the supervisor and planner to reschedule it✓ Answer
- D.Skip this cycle and do the task at the next interval
A PM is scheduled before failure, so quietly skipping it or signing for work not done trades a short planned stop for a long unplanned breakdown and corrupts the equipment record. Escalating through the supervisor and planner gets the task formally rescheduled and the deferral documented.
Source: MSSC Production Standards, Maintenance Awareness — monitor and follow the preventive maintenance scheduleReport a problem with this question
5. A technician finishes a lubrication PM. When is that PM considered complete?
- A.When the next due date is marked on the machine tag
- B.When the supervisor sees the machine running again
- C.When every lubrication point has been greased
- D.When the work has been entered in the maintenance record✓ Answer
The written record is the plant's only evidence that the task was performed and it is the raw data for failure-history analysis. An unrecorded PM cannot be verified, the next due date cannot be driven from it, and gaps in the record hide the repeating patterns that root-cause work depends on.
Source: MSSC Production Standards, Maintenance Awareness — document preventive maintenance in a timely mannerReport a problem with this question
6. Why does a plant keep a repair history for every machine?
- A.To satisfy the parts supplier's warranty paperwork
- B.To show which operator was running the machine that day
- C.To reveal repeat failures so a root cause is found✓ Answer
- D.To justify buying newer production equipment each year
One repair is an event; the same repair three times is a pattern, and only the written history makes that pattern visible. Trending the record shows which component keeps failing and points to the underlying cause — misalignment, contamination, overloading — so the fix can be permanent instead of repeated.
Source: MSSC Production Standards, Maintenance Awareness — document equipment repair historyReport a problem with this question
7. Three workers are locked out on the same conveyor. Under the federal energy-control rule, who may remove a particular padlock?
- A.Any authorized employee once the job is finished
- B.The maintenance lead who wrote the procedure
- C.The shift supervisor at the end of the shift
- D.The worker who applied that padlock✓ Answer
Each authorized worker applies a personal lock and keeps the only key, and only that person removes it. This one-lock-one-worker rule guarantees the machine cannot be re-energized while anyone is still exposed; removal by anyone else is allowed only through the employer's documented exception procedure after the worker's absence is verified.
Source: OSHA general industry standard on the control of hazardous energy (lockout/tagout) — removal of a personal lockReport a problem with this question
8. A press is de-energized and locked out, but its hydraulic accumulator is still charged. What must happen before work starts?
- A.Cycle the machine once to use up the trapped pressure
- B.Relieve the stored energy and verify zero pressure✓ Answer
- C.Tag the accumulator and work carefully around it
- D.Add a second lock to the electrical disconnect
Locking the disconnect controls only the energy source; energy already stored in accumulators, springs, capacitors, pressurized lines and raised parts can still drive the machine and injure the worker. The procedure requires that stored energy be relieved or physically blocked and that a zero-energy state then be verified at the machine.
Source: OSHA general industry standard on the control of hazardous energy — release and verification of stored energyReport a problem with this question
9. An operator notices a gearbox running hot, with a new whine and a burnt-oil smell. What is the correct action?
- A.Keep running to shift end, then report it
- B.Add oil to the gearbox and finish the run
- C.Stop the machine, tag it and submit a work request✓ Answer
- D.Aim a fan at the gearbox to bring the temperature down
Heat, new noise and a burnt smell appearing together are the classic senses-based signs of an advancing failure: the lubricant film has broken down and gears or bearings are being damaged. Running on risks seizure and secondary damage, so the operator-level action is to stop, tag the machine out of service and route it to maintenance through a work request.
Source: MSSC Production Standards, Maintenance Awareness — recognize maintenance issues and know when to inform maintenance personnelReport a problem with this question
10. What is the main purpose of the lubricant film in a rolling-element bearing?
- A.To add friction so the shaft turns at a steady speed
- B.To seal the housing so shaft vibration cannot escape
- C.To hold the bearing rings tightly against the housing bore
- D.To separate the rolling surfaces so metal does not touch metal✓ Answer
The lubricant forms a thin film that keeps the rolling elements and races apart, and it also carries heat away and flushes wear debris out of the contact zone. When that film is lost through the wrong viscosity, contamination or too little lubricant, metal-to-metal contact begins and the bearing heats and wears out quickly.
Source: MSSC Production Standards, Maintenance Awareness — lubrication concepts and standard bearing lubrication practiceReport a problem with this question
11. What is the likely result of pumping far more grease into a bearing than the lube chart calls for?
- A.The bearing then needs relubrication less often
- B.The grease hardens into a protective outer coating
- C.Seals can be pushed out and the bearing overheats✓ Answer
- D.The bearing runs cooler because heat is carried away
An over-packed bearing cannot push the excess grease out of the rolling path, so the rolling elements churn through it; that churning generates heat, the base oil bleeds and oxidizes, and the internal pressure can force the seals out and let dirt in. Over-lubrication damages bearings as surely as under-lubrication does, which is why the charted quantity governs.
Source: MSSC Production Standards, Maintenance Awareness — lubrication processes and standard grease-application practiceReport a problem with this question
12. Which statement best describes when grease is chosen instead of oil?
- A.Grease is used only where the lubricant must cool the part
- B.Grease is used in high-speed systems that circulate the oil
- C.Grease is used where the lubricant must be pumped steadily
- D.Grease is used where a sealed point must hold its lubricant in place✓ Answer
Grease is oil held in a thickener, so it stays where it is applied and helps seal the point against dirt and moisture, which suits sealed, slow or hard-to-reach locations. Oil flows, so it is used where a circulating system must carry heat and debris away from high-speed parts.
Source: MSSC Production Standards, Maintenance Awareness — grease and oil types and propertiesReport a problem with this question
13. A V-belt drive has a 48-inch span between the sheave centers. Using the common rule of 1/64 inch of deflection per inch of span, how far should the belt deflect at midspan under the recommended force?
- A.1/4 inch
- B.1 1/2 inches
- C.1/2 inch
- D.3/4 inch✓ Answer
48 inches of span divided by 64 gives 3/4 inch of deflection. The deflection check is how belt tension is set: too little tension lets the belt slip, overheat and glaze, while too much tension overloads the shafts and bearings, and the force applied comes from the drive maker's data.
Source: Standard V-belt drive tensioning practice — deflection of 1/64 inch per inch of belt spanReport a problem with this question
14. What happens when a V-belt is run too loose?
- A.It slips, overheats and glazes the belt sidewalls✓ Answer
- B.It rides deeper in the groove and locks the sheave
- C.It runs cooler because contact pressure is lower
- D.It overloads the shaft bearings and the sheave hub
A slack belt cannot grip the sheave groove, so it slips; the slipping friction generates heat that hardens and glazes the belt sidewalls, cuts the torque the drive can transmit and shortens belt life. Over-tightening is the opposite error and overloads the shafts, bearings and sheave hubs.
Source: MSSC Production Standards, Maintenance Awareness — belt drives: tension and alignmentReport a problem with this question
15. A roller chain that has 'stretched' beyond its allowable limit is actually showing:
- A.rollers that have swollen from the lubricant
- B.wear in the pins and bushings of each link✓ Answer
- C.metal that has drawn out and grown longer
- D.side plates that have bent under the load
Chain elongation is not the metal stretching; it is material worn away at each pin-and-bushing joint, which lets every pitch grow a little. A worn chain climbs higher on the sprocket teeth and wears them into a hooked shape, so worn sprockets are replaced together with the chain and new links are never spliced into a worn chain.
Source: MSSC Production Standards, Maintenance Awareness — chain drives and standard roller-chain wear practiceReport a problem with this question
16. Two coupled shaft centerlines run parallel to each other but are offset side to side. This condition is called:
- A.parallel misalignment✓ Answer
- B.angular misalignment
- C.coupling backlash
- D.excessive shaft end float
Parallel (offset) misalignment means the centerlines stay parallel but are displaced sideways, while angular misalignment means they meet at an angle; most real machines show a combination of both. A flexible coupling absorbs only small amounts, so the shafts must still be aligned with a straightedge, dial indicator or laser, or the bearings, seals and coupling fail early.
Source: MSSC Production Standards, Maintenance Awareness — bearings and couplings, shaft alignmentReport a problem with this question
17. Which is the most common cause of premature bearing failure in a plant?
- A.Contamination and improper lubrication✓ Answer
- B.Electrical current passing through the shaft
- C.Metal fatigue after reaching full design life
- D.Corrosion picked up in humid outdoor storage
Most bearings never survive long enough to reach their calculated fatigue life; they are killed early by dirt, moisture and wear particles entering the bearing and by lubricant that is wrong, missing or excessive, with misalignment and overloading close behind. The early warning the operator sees is rising heat, changed noise and increasing vibration.
Source: MSSC Production Standards, Maintenance Awareness — most common causes of equipment failureReport a problem with this question
18. A motor's overload relay has tripped three times during one shift. What should be done?
- A.Reset the relay again and watch it for the shift
- B.Stop the motor and have the cause investigated✓ Answer
- C.Jumper out the overload until maintenance arrives
- D.Fit an overload relay with a higher current rating
An overload relay trips because the motor is actually drawing sustained excess current — a jammed or overloaded machine, a failing bearing, low voltage or a lost phase. Repeatedly resetting it, upsizing it or bypassing it removes the protection while leaving the fault in place, and the motor windings burn out.
Source: MSSC Production Standards, Maintenance Awareness — motor starters and overload protectionReport a problem with this question
19. In a motor starter circuit, what does the overload relay protect against, compared with the fuse or breaker?
- A.It protects the motor from sustained overcurrent✓ Answer
- B.It protects the operator from an electrical shock
- C.It protects the wiring against a dead short circuit
- D.It protects the starter contacts from arc erosion
Fuses and circuit breakers are short-circuit and overcurrent protection for the conductors and act very fast at very high current. The overload relay is sized to the motor's full-load current and trips on a smaller but sustained overcurrent that would slowly cook the windings; a motor starter is the contactor plus that overload relay.
Source: MSSC Production Standards, Maintenance Awareness — circuit protection versus motor overload protectionReport a problem with this question
20. Which statement about a hydraulic system is correct?
- A.The directional valve limits maximum system pressure
- B.The pump creates flow, and pressure comes from resistance✓ Answer
- C.The pump creates pressure, and flow follows from it
- D.The relief valve sets the flow rate to the cylinder
A hydraulic pump displaces a volume of fluid per revolution, so what it produces is flow; pressure only rises when that flow meets resistance from a load or a restriction. The relief valve caps maximum pressure by opening a path back to tank, and the directional valve simply routes flow to one side of the actuator or the other.
Source: MSSC Production Standards, Maintenance Awareness — hydraulic power systemsReport a problem with this question
21. Water is collecting in the filter bowl of a machine's air preparation unit. What is the correct routine action?
- A.Drain the bowl on the schedule in the PM checklist✓ Answer
- B.Raise the regulator setting to push the water through
- C.Remove the filter element so the water can pass on
- D.Add oil at the lubricator to absorb the moisture
Compressed air carries water vapor that condenses in the filter bowl and in the receiver, so draining both on the scheduled interval is normal operator care. Water carried downstream washes lubricant out of valves and cylinders and causes rust and erratic operation; the regulator's job is to hold a constant set pressure, not to clear moisture.
Source: MSSC Production Standards, Maintenance Awareness — pneumatic power systems, filter-regulator-lubricatorReport a problem with this question
22. Hydraulic oil in the sight glass looks cloudy and milky. What does this most likely indicate?
- A.Air is being drawn in on the suction side
- B.The oil is contaminated with water✓ Answer
- C.The oil has overheated and oxidized
- D.The return filter has gone into bypass
Free and emulsified water turns hydraulic oil cloudy or milky, and it destroys the lubricating film, promotes rust and breaks down the additive package; the usual sources are a leaking cooler, a failed seal or condensation in the reservoir. Dark, burnt-smelling oil points instead to heat and oxidation, and foam with a chattering pump points to aeration.
Source: MSSC Production Standards, Maintenance Awareness — recognizing hydraulic fluid contaminationReport a problem with this question
Practice questions based on the MSSC Production Standards and the published content of the Certified Production Technician modules, together with federal OSHA general-industry requirements and standard manufacturing practice. MSSC and CPT are marks of the Manufacturing Skills Standards Council; this site is not affiliated with or endorsed by MSSC. Questions here never depend on recalling a regulatory limit, a citation number or a machine specification — always follow your own facility's written programs and the manufacturer's documentation for the equipment you run, and confirm current requirements before testing. About the CPT certification →