Book 3 Chapter 11: Confined Space Entry

Question 1

Relative to confined spaces, the minimum O2 level should not be below ________%
A) 10
B) 12
C) 20
D) 2

Answer 1

C) 20

Question 2

An example of a confined space would be:
A) A residential basement room
B) A trench
C) An engine room
D) All of the above

Answer 2

D) All of the above

Question 3

When a worker requires a safety harness and enters a vessel from the top, the harness shall:
A) Be attached to a winch
B) Keep the worker in a prone position
C) Be constructed of hemp material
D) Maintain the worker in a vertical position during rescue

Answer 3

D) Maintain the worker in a vertical position during rescue

Question 4

The “buddy” of a confined space worker:
A) Must be able to summon help without leaving his station
B) Must leave his station if the worker requests it
C) Should be able to perform a rescue without assistance
D) Need not have knowledge of confined space hazards

Answer 4

A) Must be able to summon help without leaving his station

Question 5

Confined space entry rules that apply where the work in progress may cause:
A) An accident
B) The worker to refuse to perform his/her job
C) Too much noise to withstand
D) Moisture vapors to be released in the atmosphere
E) Equipment being used to become a hazard

Answer 5

E) Equipment being used to become a hazard

Question 6

In a confined space, the O2 by volume level should not go below:
A) 30%
B) 20%
C) 35%
D) 25%
E) 40%

Answer 6

B) 20%

Question 7

A person attending to a worker in a confined space may leave their station:
A) For ten minutes every hour
B) To summon hepatitis if the worker becomes unconscious
C) Only long enough to go to the washroom
D) To retrieve tools/equipment for the worker
E) Only when properly relieved by another qualified person

Answer 7

E) Only when properly relieved by another qualified person

Question 8

When tests indicate harmful gases are present in a confined space where a worker must enter, he/she must:
A) Wait until the gases dissipate
B) Make sure a worker is stationed outside to assist him/her in case of emergency
C) Wear a safety belt and line
D) Receive special permission from OH&S before entering
E) Wear approved respiratory equipment

Answer 8

E) Wear approved respiratory equipment

Question 9

Before entering a confined space, the final step would be to:
A) Check the O2 volume level
B) Test the area for toxic gases
C) Have a safety person at the entrance
D) Issue a safe work agreement
E) Check the structure for safety

Answer 9

D) Issue a safe work agreement

Question 10

Before entering any confined space, it is good practice to:
A) Plan the entry using a confined entry check list
B) Wear light clothing due to extreme temperatures in enclosed areas
C) Verify the operator’s isolation points through the plant safety committee
D) Estimate how long you will be there
E) Inform the plant manager of your whereabouts

Answer 10

A) Plan the entry using a confined entry check list

Question 11

Requirements for entry into confined spaces are governed by the:
A) Boiler and Pressure Vessels Regulations
B) Confined Space Entry Regulation
C) Occupational Health and Safety Regulation
D) Workers Compensation Act
E) Provincial Fireman’s Regulations

Answer 11

C) Occupational Health and Safety Regulation

Question 12

Confined space means any enclosed or partially enclosed space having:
A) Restricted entry and exit
B) Limited room for tools and equipment
C) Elevated air temperatures
D) No way out
E) Harmful gases, vapors, mists, or dusts

Answer 12

A) Restricted entry and exit

Question 13

When a worker requires a safety harness and enters a vessel from the top, the harness shall:
A) Keep the worker in a prone position
B) Be constructed of hemp material
C) Be made of a synthetic material;
D) Be attached to a winch
E) Maintain the worker in a vertical position

Answer 13

E) Maintain the worker in a vertical position

Question 14

In preparation for a confined space entry the emergency preparation procedure provides for all of the following except:
A) Worker trained in artificial respiration
B) Unit evacuation and assembly point
C) Training the observer to remove a worker
D) Adequate fresh air breathing equipment
E) Aerosol emergency horn

Answer 14

C) Training the observer to remove a worker

Question 15

Confined space entry presents all of the following potential hazards except:
A) The use of improper equipment creates potentially dangerous conditions
B) Moving vehicular traffic
C) Harmful substances and/or creatures may be present
D) The environment, or work in progress, may cause equipment being used to become a hazard
E) Improper lighting makes it difficult to see or identify hazards

Answer 15

B) Moving vehicular traffic

Question 16

Some important questions to consider when planning to enter a confined space include all of the following except:
A) Is the temperature within the space within tolerable working limits?
B) Has the space been made secure from outside contamination?
C) Is the confined space structurally safe to enter?
D) If mechanical ventilation is provided no oxygen level measurements is required
E) Has the area been tested for the presence of explosive or toxic gases?

Answer 16

D) If mechanical ventilation is provided no oxygen level measurements is required

Question 17

Confined space include, but are not limited to all of the following except:
A) Tanks
B) Washrooms
C) Silos
D) Sewers
E) Trenches

Answer 17

B) Washrooms

Question 18

A Confined Space is defined as:
A) Any enclosed or partially enclosed space having restricted access which due to its nature may form a trap or become a life threatening environment
B) Any partially enclosed space having restricted access and egress and which due to its nature may form a trap or become a life threatening environment
C) Any enclosed or partially enclosed space having restricted access and egress and which due to its nature may form a trap or become a life threatening environment
D) Any enclosed or partially enclosed space having access and egress and which due to its nature may form a trap or become a life threatening environment
E) Any enclosed space having restricted access and egress and which due to its nature may form a trap or become a life threatening environment

Answer 18

C) Any enclosed or partially enclosed space having restricted access and egress an which due to its nature may form a trap or become a life threatening environment

Question 19

Typical Occupational Health and Safety (OH&S) Regulations state that no worker shall be required or permitted to enter a confined space unless all of the following conditions are satisfied except:
A) Appropriate tests have been made immediately prior to entry to confirm the absence of any harmful gases
B) A ventilation system is being used
C) A deficiency of oxygen has not developed
D) The worker has been provided with and is wearing approved respiratory protective equipment
E) All sources or potential sources of ignition have been controlled or eliminated when flammable or explosive gases are present

Answer 19

B) A ventilation system is being used

Question 20

A worker inside a confined space that is being ventilated and in which a harmful atmosphere must not develop shall be:
A) Attended by at least two other workers at all times
B) Attended by another worker only if the ventilation source is shut off
C) In possession of a fully charged emergency air horn
D) Allowed to send the safety watch person to fetch tools
E) Be in continuous, direct sight for a fellow worker

Answer 20

D) Allowed to send the safety watch person to fetch tools

Question 21

In preparation for a confined space entry the procedure lists the material hazards ‘unique’ to this entry including all of the following except:
A) Flammable gases
B) Pyrophoric materials
C) Toxic chemicals
D) Oxygen
E) Toxic gases, i.e H2S and chlorine

Answer 21

D) Oxygen

Question 22

Relative to confined spaces, the minimum O2 level should not be below:
A) 2%
B) 10%
C) 12%
D) 20%
E) 18%

Answer 22

D) 20%