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MSSC CPT practice questions

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Question 1Safety

Which type of eye protection is designed to protect against flying particles from both the front and the sides?

  1. Contact lenses
  2. Safety glasses with side shields Correct answer.
  3. Sunglasses
  4. Reading glasses

Explanation

Safety glasses with side shields are impact-rated and block particles approaching from the front and side. Ordinary sunglasses and reading glasses are not safety-rated, and contact lenses provide no barrier protection.

Question 2Safety

After a fire alarm sounds and workers evacuate the building, where should they go?

  1. The parking lot next to their vehicle
  2. The designated assembly area Correct answer.
  3. The nearest street corner
  4. Back to their workstation

Explanation

Evacuation procedures require workers to report to a predetermined assembly area so supervisors can account for everyone. Going to vehicles, re-entering the building, or scattering to street corners prevents an accurate head count and can put people in danger.

Question 3Safety

Which technique is correct for manually lifting a heavy box?

  1. Bend at the waist and reach out for the load
  2. Bend the knees and keep the load close to the body Correct answer.
  3. Hold the load away from the body at arm's length
  4. Twist the torso while lifting the load

Explanation

Bending the knees and keeping the load close uses the leg muscles and reduces strain on the lower back. Reaching out, twisting, or holding the load away increases the force on the spine and the risk of injury.

Question 4Safety

A small oil spill creates a slip hazard on the floor. What should be done first?

  1. Wash it into a floor drain
  2. Cover it with cardboard
  3. Leave it for the end of the shift
  4. Block off the area and clean it up promptly Correct answer.

Explanation

Spills should be controlled immediately by isolating the area and cleaning them up so coworkers are not exposed to a slip hazard. Covering, delaying, or washing the spill into a drain does not remove the hazard and may create an environmental violation.

Question 5Safety

A chemical splashes into a worker's eye. What is the correct first action?

  1. Rub the eye vigorously
  2. Apply hand sanitizer
  3. Wait to see if irritation develops
  4. Flush the eye at an eyewash station for at least 15 minutes Correct answer.

Explanation

Chemical eye exposures require immediate flushing with clean water at an eyewash station, generally for at least 15 minutes. Rubbing, applying other products, or waiting allows the chemical to continue damaging tissue.

Question 6Safety

Before using a hammer, which condition should be checked?

  1. The weight compared with other hammers
  2. The brand name on the handle
  3. That the handle is secure and the head is not cracked Correct answer.
  4. The paint color of the head

Explanation

A hammer is unsafe if the head is cracked or the handle is loose, because the head can separate during a swing. Paint, weight, and brand do not indicate whether the tool is structurally safe to use.

Question 7Safety

You find a coworker unresponsive and not breathing. What should you do first?

  1. Wait for a supervisor to arrive
  2. Call emergency services and begin CPR or use an AED Correct answer.
  3. Give the person water
  4. Move the person to a break room

Explanation

An unresponsive person who is not breathing needs emergency medical help and immediate CPR or an AED. Giving water, moving the person unnecessarily, or waiting delays lifesaving care.

Question 8Safety

What is a near miss?

  1. An event that could have caused injury or damage but did not Correct answer.
  2. Damage to property only
  3. An injury that requires medical treatment
  4. A minor injury requiring first aid

Explanation

A near miss is an unplanned event that did not result in injury or damage but had the potential to do so. Reporting near misses allows hazards to be corrected before a real injury occurs.

Question 9Safety

Who is permitted to remove a lockout device from an energy-isolating device?

  1. The newest employee on the shift
  2. The maintenance manager
  3. Any supervisor in the area
  4. The authorized employee who applied it, following the employer's procedure Correct answer.

Explanation

Lockout devices are removed only by the authorized employee who applied them, using the employer's specific removal procedure. Supervisors, managers, and other workers cannot remove another employee's lock unless the formal exception procedure is followed.

Question 10Safety

Which section of a Safety Data Sheet contains first-aid measures?

  1. Section 4 Correct answer.
  2. Section 11
  3. Section 1
  4. Section 8

Explanation

Under the Hazard Communication Standard, Section 4 of the SDS provides first-aid measures for each route of exposure. Section 1 covers identification, Section 8 covers exposure controls, and Section 11 covers toxicological information.

Question 11Safety

Which class of fire extinguisher is intended for flammable liquid fires?

  1. Class C
  2. Class A
  3. Class D
  4. Class B Correct answer.

Explanation

Class B extinguishers are rated for flammable liquids such as gasoline, oil, and solvents. Class A is for ordinary combustibles, Class C is for electrical equipment, and Class D is for combustible metals.

Question 12Safety

What is the primary purpose of a machine guard?

  1. To reduce noise only
  2. To increase machine speed
  3. To prevent workers from contacting moving machine parts Correct answer.
  4. To hold tools during maintenance

Explanation

Machine guards physically prevent workers from reaching into pinch points, rotating parts, and other hazardous areas. They are not designed to improve speed, serve as tool holders, or only reduce noise.

Question 13Safety

A pedestrian is walking through an area where forklifts operate. What is the safest practice?

  1. Use marked walkways and make eye contact with operators Correct answer.
  2. Walk behind a forklift that is reversing
  3. Assume the operator has seen you
  4. Run across the aisle to save time

Explanation

Pedestrians should stay in marked walkways and make eye contact with forklift operators before crossing their path. Walking behind a reversing forklift, assuming the operator sees you, or running across an aisle puts you in a blind spot or unpredictable position.

Question 14Safety

Where should a personal fall arrest lanyard be attached to a full-body harness?

  1. To a wrist strap
  2. To the front chest strap
  3. To a side belt loop
  4. To the back D-ring between the shoulder blades Correct answer.

Explanation

The back D-ring between the shoulder blades is the approved attachment point for fall arrest because it keeps the body upright after a fall. Side loops, chest straps, and wrist straps are not designed to support fall arrest forces.

Question 15Safety

Which practice helps prevent exposure to bloodborne pathogens?

  1. Wearing gloves and following universal precautions Correct answer.
  2. Washing disposable gloves and reusing them
  3. Recapping used needles by hand
  4. Using bare hands if the task is quick

Explanation

Universal precautions treat all blood and body fluids as potentially infectious, so gloves and other barriers are used every time. Recapping needles, working bare-handed, or reusing disposable gloves all increase the risk of exposure.

Question 16Safety

What hazard does a ground-fault circuit interrupter (GFCI) primarily protect against?

  1. Static electricity buildup
  2. Electric shock from a ground fault Correct answer.
  3. Voltage spikes
  4. Circuit overload only

Explanation

A GFCI senses small differences in current flowing to and from a device and quickly shuts off power when a ground fault occurs. This protects workers from electric shock; overload protection and voltage spike protection are different functions.

Question 17Safety

What must a worker do before each use of a tight-fitting respirator?

  1. Nothing if the respirator is new
  2. Test it by smelling a strong chemical
  3. Shave off all facial hair
  4. Perform a user seal check Correct answer.

Explanation

A user seal check confirms that the respirator seals against the face before entering a hazardous atmosphere. Facial hair can interfere with a seal, but shaving is not the required pre-use step, and a new respirator still needs a seal check.

Question 18Safety

How should compressed gas cylinders be stored?

  1. Upright and secured with valve protection caps in place Correct answer.
  2. Lying on their sides
  3. Unsecured so they can be moved quickly
  4. Near a heater to prevent freezing

Explanation

Compressed gas cylinders should be stored upright, secured against tipping, and fitted with valve protection caps when not in use. Lying them down, placing them near heat, or leaving them unsecured creates valve damage, fire, or impact hazards.

Question 19Safety

Which practice best prevents slips and trips in a work area?

  1. Run between workstations
  2. Apply wax to walking surfaces
  3. Keep aisles clear and clean up spills immediately Correct answer.
  4. Dim the lighting to reduce glare

Explanation

Clear aisles and prompt spill cleanup remove the two most common causes of slips and trips. Waxing surfaces, running, and dimming lights all increase the likelihood of a fall.

Question 20Safety

A chemical is transferred from a labeled drum into a smaller container. What must the smaller container have?

  1. The manufacturer's phone number only
  2. The expiration date only
  3. The batch number only
  4. A label with the product identifier and hazard information Correct answer.

Explanation

Under the Hazard Communication Standard, secondary containers must be labeled with the product identifier and hazard information unless they are used immediately by the person who transferred the chemical. A phone number, date, or batch number alone does not communicate the hazard.

Question 21Safety

At what 8-hour time-weighted average noise exposure must an employer implement a hearing conservation program?

  1. 80 dBA
  2. 90 dBA
  3. 85 dBA Correct answer.
  4. 100 dBA

Explanation

OSHA sets the hearing conservation action level at 85 dBA as an 8-hour time-weighted average. At this level, employers must provide monitoring, hearing tests, and hearing protection.

Question 22Safety

What is required before entering a permit-required confined space?

  1. Testing the atmosphere, ventilating if needed, and obtaining an entry permit Correct answer.
  2. Sending one worker in alone to check
  3. Wearing only a dust mask
  4. Simply opening the hatch for light

Explanation

A permit-required confined space entry requires atmospheric testing, ventilation or other controls, an entry permit, and an attendant outside the space. Opening the hatch, entering alone, or wearing only a dust mask does not address the hazards.

Question 23Safety

Welding must be done near combustible materials. What control is required?

  1. A verbal approval from a coworker
  2. A hot work permit and a fire watch Correct answer.
  3. Wetting the floor around the area
  4. Opening a window for ventilation

Explanation

Hot work near combustibles requires a written hot work permit and a fire watch to control ignition sources and respond to fires. Verbal approval, wetting the floor, or ventilation alone does not provide the required fire prevention controls.

Question 24Safety

After lockout/tagout is applied, how should a worker verify that stored energy has been isolated?

  1. Trust the tag on the disconnect
  2. Ask a coworker to confirm
  3. Try to start the equipment or test with a meter Correct answer.
  4. Wait five minutes and begin work

Explanation

Verification requires attempting to start the equipment or testing with a meter to confirm that no energy remains. A tag, a coworker's word, or a waiting period does not prove that the equipment is de-energized.

Question 25Safety

What is the primary purpose of a job safety analysis (JSA)?

  1. To schedule overtime
  2. To set pay rates for each task
  3. To discipline workers who break rules
  4. To identify hazards and controls for each step of a task Correct answer.

Explanation

A JSA breaks a task into steps and identifies the hazards and controls for each step before work begins. It is a planning tool, not a disciplinary, pay-setting, or scheduling document.

Question 26Safety

In the hazard communication color system used on signs and labels, what does red indicate?

  1. The location of emergency equipment such as eyewash stations
  2. A caution condition that may cause only minor injury
  3. An area where personal protective equipment is required
  4. An immediate hazard that could cause serious injury or death Correct answer.

Explanation

Red is reserved for danger, meaning an immediate hazard that could cause serious injury or death. Yellow marks caution for potential but less severe hazards, blue marks mandatory PPE or safety information, and green marks emergency equipment and first aid.

Question 27Safety

What is the correct technique for lifting a heavy box from the floor?

  1. Twist at the waist while lifting to turn toward the destination
  2. Bend the knees, keep the load close, and lift with the legs Correct answer.
  3. Keep the legs straight and bend at the waist
  4. Hold the load out away from the body for better balance

Explanation

Bending the knees and keeping the load close uses the strong leg muscles and shortens the lever arm on the lower back. Twisting while lifting and holding the load away from the body both increase spinal loading and the risk of injury.

Question 28Safety

A hard hat has just absorbed a heavy impact from a falling object. What should be done with it?

  1. Remove it from service and replace it Correct answer.
  2. Keep using it as long as no cracks are visible
  3. Keep using it until the next scheduled replacement date
  4. Paint over any scuff marks and continue using it

Explanation

A hard hat that takes a significant impact may have hidden damage that reduces its protective capacity, even without visible cracks. Impact-damaged head protection must be removed from service and replaced immediately.

Question 29Safety

What is the correct way to insert a foam earplug?

  1. Moisten it with saliva and press it in with the fingertip
  2. Push it in with a twisting motion while the ear canal is left alone
  3. Insert it only partly so warning signals remain audible
  4. Roll it thin, pull the ear outward, and hold it until it expands Correct answer.

Explanation

A foam plug must be rolled into a thin cylinder, the ear pulled outward to straighten the canal, and the plug held in place while it expands to seal. A full seal is what produces the rated noise reduction while still allowing warning signals to be heard.

Question 30Safety

You find a power cord on a portable grinder with exposed inner wires. What should you do?

  1. Take the tool out of service and tag it for repair Correct answer.
  2. Use it only for short jobs until the end of the shift
  3. Plug it into a GFCI so the damaged cord no longer matters
  4. Wrap the damaged area with electrical tape and keep using it

Explanation

Damaged cord insulation removes the barrier between the worker and energized conductors, so the equipment must be de-energized and tagged until repaired. Tape wraps and short-term workarounds leave the hazard in place.

Question 31Safety

When there is a risk of flying chips, what eye protection is the minimum required?

  1. Safety glasses with side shields Correct answer.
  2. Sunglasses with tinted lenses
  3. A hairnet worn with safety shoes
  4. Ordinary prescription eyeglasses

Explanation

Safety glasses are designed and tested to resist impact, and side shields protect the eyes from chips coming from the side. Ordinary eyeglasses and sunglasses are not impact-rated and leave the sides of the eyes exposed.

Question 32Safety

After evacuating a building during a fire alarm, what should workers do?

  1. Go back inside once the alarm stops sounding
  2. Wait in the parking lot until a supervisor calls their name
  3. Wait near the entrance to watch for the fire department
  4. Go to the assembly area and stay until accounted for Correct answer.

Explanation

Evacuation plans require workers to proceed to a designated assembly area so a head count can confirm everyone is out. Re-entering before the all-clear or wandering away from the assembly point defeats the accountability check.

Question 33Safety

What is the best way to lower the risk of heat stress while working in a hot area?

  1. Wear extra layers to block radiant heat
  2. Drink water often and take rest breaks in a cool area Correct answer.
  3. Skip breaks so the shift is finished sooner
  4. Drink only coffee or soda to stay alert

Explanation

Heat stress is controlled by replacing fluids, cooling down during breaks, and gradually acclimating to hot work. Caffeine and alcohol promote fluid loss, and skipping breaks allows core temperature to keep rising.

Question 34Safety

When must lockout/tagout be applied to a machine?

  1. Only when the repair is expected to last more than one shift
  2. Only when the machine is driven by an electric motor
  3. Whenever servicing could release hazardous energy and injure a worker Correct answer.
  4. Only after the machine has run for a complete shift

Explanation

Lockout/tagout applies whenever servicing or maintenance could result in unexpected energization, startup, or release of stored energy that could harm a worker. It covers all energy types, including pneumatic, hydraulic, and gravity, and applies regardless of how long the task takes.

Question 35Safety

Under the hazard communication standard, what must appear on a workplace container label for a hazardous chemical?

  1. The expiration date, the supplier's phone number, and the batch code
  2. The product identifier and hazard pictograms or signal words Correct answer.
  3. The weight of the container and the storage location
  4. The name of the worker who last used the product

Explanation

Workplace labels must identify the product and convey the hazard, typically through pictograms, a signal word, and hazard statements. Secondary containers must carry this information unless the material is used immediately by the person who transferred it.

Question 36Safety

What does the capacity plate on a powered industrial truck tell the operator?

  1. The top speed the truck can reach on a level floor
  2. The turning radius of the truck when fully loaded
  3. The maximum height to which the forks may be raised
  4. The maximum safe load at the stated load center Correct answer.

Explanation

The data plate states the load the truck can handle with the load center at the specified distance from the fork face. Moving the load center farther out reduces the allowable weight, so the plate value cannot be exceeded.

Question 37Safety

What is the main duty of an attendant stationed outside a permit-required confined space?

  1. To keep the entry permit paperwork filed
  2. To enter the space and help the entrants with the work
  3. To track entrants and summon help if conditions change Correct answer.
  4. To perform the atmospheric testing inside the space

Explanation

The attendant stays outside, keeps an accurate count of who is inside, monitors conditions, and calls for rescue without entering. Entering to help would leave the space unattended and add another victim to the emergency.

Question 38Safety

A portable ladder must reach a work point 20 feet above the ground. Applying the 4-to-1 rule, how far should the base be set from the wall?

  1. 20 feet
  2. 2 feet
  3. 10 feet
  4. 5 feet Correct answer.

Explanation

The 4-to-1 rule sets the base 1 foot out from the wall for every 4 feet of working height. For a 20-foot reach, 20 divided by 4 gives a base distance of 5 feet.

Question 39Safety

In general industry, at what height above a lower level must employees be protected from falling?

  1. 2 feet
  2. 10 feet
  3. 4 feet Correct answer.
  4. 15 feet

Explanation

General industry rules require fall protection at 4 feet above a lower level for surfaces such as walking-working surfaces. Construction work uses a 6-foot trigger, so the threshold depends on the industry standard that applies.

Question 40Safety

When is it appropriate for a worker to use a portable fire extinguisher on a fire?

  1. When the fire is spreading quickly and the worker has a clear escape route
  2. When the worker has never been trained but the fire appears small
  3. When the fire is small, the worker is trained, and an exit is available Correct answer.
  4. When the fire involves an unknown chemical and is confined to one drum

Explanation

Workers should fight a fire only if it is small, they are trained in extinguisher use, and they have a clear escape path behind them. Any other condition calls for evacuation and alarm activation rather than firefighting.

Question 41Safety

How should a compressed gas cylinder be prepared before it is moved on a hand truck?

  1. The cylinder is laid horizontally on the truck
  2. The cylinder valve is cracked open to relieve pressure
  3. The regulator is left attached and the valve left open
  4. The valve protection cap is in place and the cylinder is secured Correct answer.

Explanation

Cylinders must be moved with the valve protection cap installed and restrained so they cannot fall or roll. Regulators should be removed and valves closed during transport to protect the valve from breaking off.

Question 42Safety

A worker believes an assigned task poses an imminent risk of death or serious injury. What action is consistent with OSHA protections?

  1. Refuse the task only after coworkers agree in writing
  2. Continue the task and file a complaint after the shift ends
  3. Refuse the task and report the concern to the employer Correct answer.
  4. Walk off the job permanently without notifying anyone

Explanation

A worker may refuse a task when a genuine imminent danger exists and there is no time to remove it through normal channels, but the concern must be reported to the employer. The protection is not a general right to refuse any disliked assignment.

Question 43Safety

Why should loose sleeves and jewelry be removed before working near a rotating shaft?

  1. They reduce the worker's grip strength
  2. They can be caught and pull the worker into the machine Correct answer.
  3. They can damage the finish on the shaft
  4. They interfere with the machine's lubrication

Explanation

Rotating parts grab loose material and reel the wearer in before the worker can react. Removing loose clothing and jewelry eliminates the snag point that causes entanglement injuries.

Question 44Safety

A drum of solvent tips over and begins spreading across the floor. What should a worker do first?

  1. Use paper towels to soak it up quickly
  2. Wash it into the floor drain with water
  3. Cover it with sawdust and continue working
  4. Alert others, leave the area, and notify the supervisor Correct answer.

Explanation

Untrained workers should not attempt cleanup of a chemical release; they should warn others, move away from vapors, and report it so trained responders can act. Draining a chemical to a floor drain can create a fire, vapor, or environmental hazard.

Question 45Safety

A worker receives a small thermal burn on the hand. What is appropriate first aid?

  1. Apply butter or grease to the burn
  2. Rub ice directly against the burned skin
  3. Cool the burn with clean, cool running water Correct answer.
  4. Open any blisters that have formed

Explanation

Cool running water removes heat from the tissue and limits the depth of the injury. Home remedies and ice can trap heat, damage tissue further, or introduce infection.

Question 46Safety

Before an air-purifying respirator may be used, which condition must be met?

  1. The oxygen concentration is below 16 percent
  2. The work is performed inside a permit-required confined space
  3. The atmosphere is immediately dangerous to life or health
  4. Oxygen is adequate and the contaminant is below IDLH Correct answer.

Explanation

Air-purifying respirators filter contaminants from the air, so they require sufficient oxygen and contaminant levels below immediately dangerous to life or health conditions. IDLH or oxygen-deficient atmospheres require atmosphere-supplying respirators.

Question 47Safety

According to ANSI Z358.1, an eyewash station must be reachable from the chemical hazard within how much travel time?

  1. 60 seconds
  2. 5 seconds
  3. 30 seconds
  4. 10 seconds Correct answer.

Explanation

The standard requires the eyewash to be within about 10 seconds of unobstructed travel on the same level as the hazard. That short interval limits contact time so chemical damage to the eyes is minimized.

Question 48Safety

A floor opening is protected by a rigid cover. How must that cover be handled?

  1. Painted the same color as the floor so it does not look unsightly
  2. Marked as a hole or cover and secured against accidental movement Correct answer.
  3. Used only when the opening is smaller than 12 inches across
  4. Laid over the opening without fasteners so it can be removed quickly

Explanation

Hole covers must be secured to prevent displacement and marked to warn workers that an opening exists beneath them. A cover that can shift or that blends into the floor fails to protect anyone.

Question 49Safety

Why is a layer of fine combustible dust on beams and equipment a serious hazard?

  1. It hides damaged wiring from inspectors
  2. It makes the floor too slippery for forklifts
  3. It attracts moisture that corrodes machine parts
  4. A disturbance can suspend it in air and create an explosive cloud Correct answer.

Explanation

Accumulated combustible dust can be lofted into a cloud by a bump, a draft, or a primary explosion, and the suspended cloud can then ignite with devastating force. Regular housekeeping keeps accumulations below hazardous depths.

Question 50Safety

A personal fall arrest system stops a worker's fall and the worker is rescued without injury. What must happen to the harness and lanyard?

  1. They must be removed from service and inspected or replaced Correct answer.
  2. They may be reused after the shock absorber is re-stitched
  3. They may be reused if the webbing looks clean
  4. They may be reused if the fall was less than 4 feet

Explanation

Any component that has arrested a fall has been subjected to forces near its design limit and must be taken out of service for inspection or destruction. Shock-absorbing lanyards and harnesses are not field-repairable.