Complete your confined space entry training with these practice questions and answers. This guide covers permit-required confined spaces, atmospheric testing, entry procedures, and rescue requirements.
Q: 1. Which of the following is included but not limited to confided spaces?A) VesselsB) TanksC) VaultsD) TrenchesE) All the Above
Answer: E) All the above
Q: How many times per year are rescue exercises conducted?
Answer: At least once
Q: Many workers are injured and killed each year while working in confined spaces. An estimated ______ of the fatalities have been among the would-be rescuers.
Answer: 60%
Q: Studies reveal that every year approximately ______ preventable deaths occur in confined spaces.
Answer: 67
Q: A space that meets the definition of a confined space and contains other recognized serious safety and health hazards is what?A) a confined spaceB) a permit-required confined spaceC) a non-permit-required confined spaceD) not a confined space
Answer: B) a permit-required confined space
Q: Entering a permit space can prove fatal for an employee when the O2 level is below ______ and above _______
Answer: Below 19.5% and Above 23.5%
Q: T/F: If oxygen level is above 23.5% by volume the environment becomes unstable and prone to flash fires or explosion
Answer: True
Q: T/F: If oxygen level is below 16% by volume the environment becomes unstable and prone to flash fires or explosion
Answer: True
Q: What is the correct order of atmospheric testing?A) flammables, toxics, oxygen, otherB) toxics, oxygen, flammables, otherC) oxygen, toxics, flammables, otherD) oxygen, flammables, toxics, other
Answer: D) oxygen, flammables, toxics, other
Q: Atmospheres that contain a flammable component above ______ % of its Lower Explosive Limit are considered hazardous for confined space entry?A) 5%B) 10%C) 20%D) 30%
Answer: B) 10%
Q: Which cause of death claims the highest percentage in confined spaces?A) EngulfmentB) Heat stress/exposureC) Hazardous atmospheresD) Struck by falling objects
Answer: C) Hazardous atmospheres
Q: Cause of death % from hazardous atmospheres
Answer: 65%
Q: Cause of death % from engulfment
Answer: 13%
Q: Cause of death % from struck by falling objects
Answer: 7%
Q: Cause of death % from heat stress/exposure
Answer: 6%
Q: Cause of death % from other
Answer: 4%
Q: T/F: Confined spaces are large enough and so configured that an employee can bodily enter and perform assigned work
Answer: True
Q: T/F: Confined spaces have limited or restricted means for entry or exit
Answer: True
Q: T/F: Confined spaces are designed for continuous employee occupancy
Answer: False- not designed for continuous employee occupancy
Q: T/F: Permit required confined spaces contain or have the potential to contain a hazardous atmosphere
Answer: True
Q: T/F: Permit required confined spaces contain a material that has the potential for engulfing an entrant
Answer: True
Q: T/F: Permit required confined spaces have an internal configuration such that an entrant could be trapped or asphyxiated by inwardly converging walls, or a floor which slopes and tapers to a smaller cross section
Answer: True
Q: T/F: Permit required confined spaces contain any other recognized serious safety or health hazard
Answer: True
Q: What are the six groups of confined space hazards?
Answer: 1. Atmospheric hazards2. Physical hazards3. Engulfment hazards4. Corrosive hazards5. Biological hazards6. Other hazards
Q: Federal OSHA
Answer: nation wide, code of federal regulations
Q: CAL OSHA
Answer: CA only, code of California regulations
Q: How many deaths were attributed to engulfment between 1980-1989?
Answer: 227
Q: Suffocation, Asphyxiation, Poisoning are what kind of hazards?
Answer: Atmospheric
Q: Explosions, Fire, Entrapment, Crushing, Electrocution are what kind of hazards?
Answer: Physical
Q: Anxiety, Phobia, Panic are what kind of hazards?
Answer: Psychological
Q: Three most common naturally occurring gases found in confined spaces
Answer: Methane, CO2 and Hydrogen Sulfide
Q: Most effective means of controlling atmospheric hazards?
Answer: Ventilation
Q: What gas is colorless, odorless, non-toxic, asphyxiant [displaces O2], lighter than air, explosive range 5%-15%
Answer: Methane
Q: What gas is colorless, odorless, toxic, asphyxiant [displaces O2], vapor density = to air, explosive range 12%-74.2%
Answer: Carbon Monoxide
Q: What gas is colorless, smells like rotten eggs, toxic, vapor density is 1.19, explosive range 4%-44%, common in sewage facilities, diminishes your sensitivity to smell
Answer: Hydrogen sulfide
Q: What gas is pungent, irritating, 1-10 ppm exposure causes respiratory and pulse rate increase and decrease in depth of respiration, vapor density is 2.26, non-flammable
Answer: Sulfur dioxide
Q: Colorless, odorless, non-combustible gas, toxic, exposure symptoms, headache, dizziness, restlessness
Answer: Carbon dioxide
Q: What kind of materials are involved in engulfment incidents?
Answer: Grains, sand, gravel, cement, clay, sawdust, liquids
Q: According to CAL-OSHA, entry into a confined space hasoccurred whena. you don your respiratory protection.b. any part of the entrants body breaks the plane of an opening into the confined space.c. the Entry Supervisor declares you the entrant.d. a hazardous atmosphere has been determined to exist by use of atmospheric monitoring.
Answer: b. any part of the entrants body breaks the plane of an opening into the confined space.
Q: Employers in California, with employees entering permit required spaces need to be concerned with complying with the following standardsa. A.N.S.I. guidelinesb. N.I.0.S.H. guidelinesc. CAL-OSHA guidelinesd. All of the above
Answer: d. All of the above
Q: N.1.0.S.H. and other studies reveal that rescuers constitute as many as ___ % of thedeaths in confined spaces.a. 10%b. 30%c. 40%d. 60%
Answer: d. 60%
Q: What is the leading cause of fatalities in confined spaces?a. Engulfmentb. Hazardous atmospheresc. Heat stressd. Struck by falling objects
Answer: b. Hazardous atmospheres
Q: Which one of the following is one of the two groups of confined spaces?a. Below grade confined spacesb. Above grade confined spacesc. Mobile confined spacesd. Permit required confined spaces
Answer: d. Permit required confined spaces
Q: Which one of the following is not a characteristic of a permit required confined space?a. Oxygen level at 21 %b. Contains material that can engulf the entrantc. Has the potential to contain a hazardous atmosphered. Contains any recognized serious health or safety hazard
Answer: a. Oxygen level at 21 %
Q: Which one of the following is not a potential effect of hazardous atmospheres in confinedspaces?a. Suffocationb. Hearing deficitc. Poisoningd. Explosion / fire
Answer: b. Hearing deficit
Q: All but one are the most common gases found in confined spacesa. carbon monoxideb. oxygenc. hydrogen sulfided. chlorine
Answer: d. chlorine
Q: Which one of the following statements regarding gases is incorrect?a. Methane is colorless and odorlessb. Carbon monoxide is nearly equal to air in vapor densityc. Methane is heavier than aird. Hydrogen sulfide is heavier than air
Answer: c. Methane is heavier than air
Q: 9. When performing pre-entry atmosphere monitoring, the first thing monitored for should bea. potential dustsb. flammable gases·c. potential toxic concentrationsd. oxygen content
Answer: d. oxygen content
Q: Acceptable accuracy of monitor readings is assured bya. using multiple monitorsb. replacing monitors regularlyc. calibrating regularlyd. nothing, there is no way to insure accuracy
Answer: c. calibrating regularly
Q: Physical hazards can include all of the following excepta. toxic gasesb. grinding equipmentc. mulching equipmentd. falling objects
Answer: a. toxic gases
Q: N.1.0.S.H. studies reveal that during a iO year period as many as __ people died frommechanical asphyxiation.a. 90b. 105c. 227d. 600
Answer: c. 227
Q: Common materials involved in engulfment accidents include all of the following excepta. grainb. sandc. graveld. steam
Answer: d. steam
Q: A common cause of engulfment accidents is when unstable material collapses under theentrant creating a void. This is referred to asa. breakawayb. bridgingc. hidden collapsed. sinking floor
Answer: b. bridging
Q: Target industries for physical and engulfment hazards in confined spaces would include allof the following excepta. grain processingb. industries with mechanized assembly equipmentc. industries that have spaces with top load applicationsd. electronics repair facilities
Answer: d. electronics repair facilities
Q: A lock-out/tag-out program provides a means for isolating which one of the followinga. electricityb. gravity flow of productc. steamd. all of the above
Answer: d. all of the above
Q: Lock-out/Tag-out procedures are to be performed bya. entrants onlyb. entry supervisors onlyc. authorized employeesd. any employee
Answer: c. authorized employees
Q: Which one of the following is not an example of lock-out/tag-out procedures?a. Electrical switch turned offb. Drive mechanisms disconnectedc. Hydraulic lines blocked & bledd. Liquid valves chained & locked
Answer: a. Electrical switch turned off
Q: Entry permits must be approved and cancelled by thea. entrantb. employerc. attendantd. entry supervisor
Answer: d. entry supervisor
Q: Entry permits must be filed and retained for a minimum ofa. 1 yearsb. 2 yearc. 5 yearsd. 6 months
Answer: a. 1 years
Q: Which one of the following is considered to be equipment used to perform ventilationprocedures in confined spaces?a. Industrial fans/ ventilatorsb. Smoke ejector fansc. Duct workd. All of the above
Answer: d. All of the above
Q: Ventilation procedures shoulda. begin following removal of the victimb. begin prior to atmosphere monitoringc. begin prior to entry and continue throughout the operationd. be pertormed using natural ventilation
Answer: c. begin prior to entry and continue throughout the operation
Q: Common ventilation plan(s) include forceda. supplyb. exhaustc. supply & exhaustd. all of the above
Answer: d. all of the above
Q: Which one of the following considerations will impact the level at which you will attempt toexhaust gases from a confined space.a. Wind directionb. Number of openingsc. Vapor density of suspected vaporsd. All of the above
Answer: d. All of the above
Q: One of the biggest concerns when ventilating an atmosphere that is above the UEL (upperexplosive limit) of a vapor isa. opening locationsb. changing a non explosive atmosphere into an explosive atmospherec. monitoring intervalsd. vessel type
Answer: b. changing a non explosive atmosphere into an explosive atmosphere
Q: Self contained breathing apparatus (SCBA) has limited application in confined spaceoperations due toa. cylinder sizeb. air qualityc. duration of air supplyd. a and c
Answer: d. a and c
Q: The respiratory protection system commonly considered best suited for confined spacerescue isa. combination / dual purpose self contained breathing apparatusb. air purifying respiratorsc. self contained breathing apparatusd. supplied air respirator with escape cylinder
Answer: d. supplied air respirator with escape cylinder
Q: The respiratory protection type not recommended unless conditions are known and can bemaintained isa. air purifying respiratorb. self contained breathing apparatusc. dual purpose SCBAd. supplied air respirator
Answer: a. air purifying respirator
Q: The biggest disadvantage to supplied air respiratory systems isa. air line limitation of 300’b. continuous supply of airc. umbilical air lined. a and c
Answer: d. a and c
Q: Supplied air respiratory systems must be equipped witha. quick fill attachmentsb. escape cylindersc. high pressure Aux. cylindersd. demand valve capability
Answer: b. escape cylinders
Q: When performing confined space operations it is critical to have reliable communicationsbetween thea. attendant and entrantb. entrant and entry supervisorc. attendant and industrial Hygienistd. attendant and back-up entrants
Answer: a. attendant and entrant
Q: In normal confined space operations communications equipmenta. is optionalb. can consist of rope signalsc. can consist of hard wire systemsd. band c
Answer: d. alI of the above
Q: Part of your communications plan should includea. back-up plansb. the type of communications to be usedc. how additional help will be summonedd. alI of the above
Answer: c. they allow the entrant to move freely & don’t require use of hands
Q: Battery operated, voice activated communications systems are frequently used becausea. they’re fail safeb. they are the most simple systemc. they allow the entrant to move freely & don’t require use of handsd. they are the clearest communication available
Answer: d. all of the above
Q: Hardwire communications systems cana. provide clear communicationsb. be cumbersome due to tag lines includedc. be good because they are not affected by poor receptiond. all of the above
Answer: b. 5
Q: O.S.H.A. requires retrieval lines and fall restraint when vertical entries of __ feet or moreare made.a. 3b. 5c. 8d. 10
Answer: d. never used because resistance cannot be felt
Q: Entrants are required to stay “on line” when making vertical entries unlessa. this would increase entrant risk of injury or is impossibleb. you need to remove the line to raise the victim mc. you don’t have enough lined. none of the above
Answer: b. the entrant presents the smallest possible profile
Q: When lifting or raising entrants, powered equipment isa. used to decrease lift timeb. more efficientc. capable of ralsing equipment and personnel at onced. never used because resistance cannot be felt
Answer: a. wristlet
Q: Chest or full body harnesses with a connection point high on the back is commonly usedfor entrants becausea. the entrant cannot disconnect the line themselvesb. the entrant presents the smallest possible profilec. the retrieval line will not be in the entrants faced. other equipment must be attached in the front
Answer: d. attendant
Q: In extremely tight openings, and with unresponsive victimssometimes used.a. wristletb. helmetc. pelvicd. improvised
Answer: b. The entry Supervisor
Q: An exact count and identities of all entrants in the confined space must be maintained bythea. entry supervisorb. employee representativec. back-up entrantsd. attendant
Answer: d. b and c
Q: Who is responsibf e for approving and cancelling all entry permits?a. The entrantb. The entry Supervisorc. The attendantd. The employee representative
Answer: d. entry supervisor
Q: The person(s) charged with removing or dealing with unauthorized persons around the sitea. the entrantb. the entry supervisorc. the attendantd. band c
Answer: c. entry supervisor, entrant, attendant