CONFINE SPACE EXAM 3 QUESTIONS
WITH 100% CORRECT ANSWERS.
What is lockout/tagout?
Isolating and disconnecting utilities and mechanical equipment serving the space, in preparation
for entry into the confined space.
OSHA allows employers to exempt some confined spaces from complete permit entry
programs if the space contains only _______________ hazards which can be controlled by
ventilation alone.
ATMOSPHERIC
Confined spaces and permit required confined spaces are the same thing.
False
Rescuers constitute approximately 60% of confined space fatalities.
True
The Entry Supervisor has the responsibility for actually going in and making a rescue in a
confined space.
False
The three main positions identified by OSHA for permit required confined space
operations are attendant, entrant and perimeter control officer.
False
Air Purifying Respirators (APR) are designed to be used in an oxygen deficient
environment.
False
The Entry Supervisor approves and cancels the confined space entry permit.
True
,The SCBA cylinder size can have an impact on rescuer mobility within a confined space.
True
When retrieving victims and rescuers from a confined space, powered equipment such as a
bumper winch is never used because resistance cannot be felt.
True
On a confined space entry, it is critical that the Entry Supervisor have constant
communications with the Entrant.
False
The attendant is responsible for knowing the count and exact names of entrants who have
entered the permit required confined space.
True
When the confined space contains a gas which is above its Upper Flammable Limit, be
prepared as the gas is imminently going to explode.
False
Of all the engulfment hazards, Steam is the most lethal to rescuers.
False
To facilitate ventilation of a confined space, use any fans available on site or at local
appliance stores.
False
An example of a lock-out, tag-out procedure is shutting a switch off at a circuit panel.
False
"Bridging" in confined spaces is a method of using ladders horizontally to get from one
confined space to another
False
, Atmospheric monitoring in confined spaces is always done in the following order: Oxygen
content, Flammable Gasses (LEL) and then potential toxins.
True
Suffocation, poisoning, explosion / fire are all potential effects of hazardous atmospheres in
confined spaces.
True
One indicator of a permit required confined space is oxygen levels of 21%.
False
The Entrant is ultimately responsible for approving and cancelling the entry permit.
False
True or False. It should be assumed that every confined space has an unknown, hazardous
atmosphere.
True
What is the lowest percentage that when combustible vapors are mixed with air and a
source ignition is present, an explosion can occur?
LOWER EXPLOSIVE LIMIT (LEL)
What is the highest percentage that when combustible vapors are mixed with air and a
source ignition is present, an explosion can occur?
UPPER EXPLOSIVE LIMIT (UEL)
Most combustible instruments display gas concentrations in percent of the _______.
LEL
What type of gas monitor:
1. Measures atmospheric concentrations of oxygen;
2. Concentrations are generally measured over a range of 0 to 25 percent (%) oxygen in air.
3. Readings are displayed on either an electronic readout or an analog meter.
WITH 100% CORRECT ANSWERS.
What is lockout/tagout?
Isolating and disconnecting utilities and mechanical equipment serving the space, in preparation
for entry into the confined space.
OSHA allows employers to exempt some confined spaces from complete permit entry
programs if the space contains only _______________ hazards which can be controlled by
ventilation alone.
ATMOSPHERIC
Confined spaces and permit required confined spaces are the same thing.
False
Rescuers constitute approximately 60% of confined space fatalities.
True
The Entry Supervisor has the responsibility for actually going in and making a rescue in a
confined space.
False
The three main positions identified by OSHA for permit required confined space
operations are attendant, entrant and perimeter control officer.
False
Air Purifying Respirators (APR) are designed to be used in an oxygen deficient
environment.
False
The Entry Supervisor approves and cancels the confined space entry permit.
True
,The SCBA cylinder size can have an impact on rescuer mobility within a confined space.
True
When retrieving victims and rescuers from a confined space, powered equipment such as a
bumper winch is never used because resistance cannot be felt.
True
On a confined space entry, it is critical that the Entry Supervisor have constant
communications with the Entrant.
False
The attendant is responsible for knowing the count and exact names of entrants who have
entered the permit required confined space.
True
When the confined space contains a gas which is above its Upper Flammable Limit, be
prepared as the gas is imminently going to explode.
False
Of all the engulfment hazards, Steam is the most lethal to rescuers.
False
To facilitate ventilation of a confined space, use any fans available on site or at local
appliance stores.
False
An example of a lock-out, tag-out procedure is shutting a switch off at a circuit panel.
False
"Bridging" in confined spaces is a method of using ladders horizontally to get from one
confined space to another
False
, Atmospheric monitoring in confined spaces is always done in the following order: Oxygen
content, Flammable Gasses (LEL) and then potential toxins.
True
Suffocation, poisoning, explosion / fire are all potential effects of hazardous atmospheres in
confined spaces.
True
One indicator of a permit required confined space is oxygen levels of 21%.
False
The Entrant is ultimately responsible for approving and cancelling the entry permit.
False
True or False. It should be assumed that every confined space has an unknown, hazardous
atmosphere.
True
What is the lowest percentage that when combustible vapors are mixed with air and a
source ignition is present, an explosion can occur?
LOWER EXPLOSIVE LIMIT (LEL)
What is the highest percentage that when combustible vapors are mixed with air and a
source ignition is present, an explosion can occur?
UPPER EXPLOSIVE LIMIT (UEL)
Most combustible instruments display gas concentrations in percent of the _______.
LEL
What type of gas monitor:
1. Measures atmospheric concentrations of oxygen;
2. Concentrations are generally measured over a range of 0 to 25 percent (%) oxygen in air.
3. Readings are displayed on either an electronic readout or an analog meter.
