RIIWHS202E Isolation and Lockout/Tagout Procedures 3

Question 1

After applying all isolation measures, what must be done to verify the isolation is effective before workers enter a confined space?

Accepted Answer

Attempt to operate the equipment to confirm it does not respond to controls

Answer

Review the equipment logbook to confirm the last maintenance date

Answer

Trust the operator's verbal assurance that the system is off

Answer

Check that the danger tag is filled in with the correct date

Question 2

What is meant by the term 'de-energisation' in the context of confined space isolation?

Accepted Answer

The process of removing, restraining or dissipating all forms of hazardous energy

Answer

Removing all workers from the confined space at the end of the shift

Answer

Switching off atmospheric monitoring equipment before exit

Answer

Reducing the ventilation flow rate after entry is complete

Question 3

If work on a confined space spans multiple shifts, what must happen to the isolation arrangements at each shift changeover?

Accepted Answer

Isolation must be re-verified, and workers from the new shift apply their own locks before entry

Answer

The isolation remains in place without review since it was applied correctly at the start

Answer

The outgoing shift supervisor verbally informs the incoming supervisor that isolation is in place

Answer

The entry permit is automatically extended and no further action is required

Question 4

Under the RIIWHS202E standard, when must the confined space entry permit be cancelled and isolation re-assessed?

Accepted Answer

When there is a change in conditions, work scope, or hazards not covered by the original permit

Answer

At the end of each calendar month regardless of work status

Answer

Only when a worker is injured inside the confined space

Answer

When the atmospheric monitor battery falls below 50% charge

Question 5

Which of the following scenarios represents a failure of isolation procedure for a confined space entry?

Accepted Answer

A standby person is stationed at the entry point without a personal lock applied

Answer

A worker applies their personal lock after the supervisor has already applied theirs

Answer

The team verifies isolation by attempting to start the equipment before entry

Answer

Blank flanges are installed in all inlet and outlet pipework before the permit is signed

Question 6

When planning isolation for a confined space that receives product via an overhead conveyor system, which hazard must specifically be controlled?

Accepted Answer

Gravitational energy — the conveyor must be stopped, blocked and unable to move or discharge material

Answer

Electrical shock from static charge on conveyor belts only

Answer

Noise generated by the conveyor motor during entry

Answer

Thermal energy from conveyor belt friction only

Question 7

What documentation must be completed after isolation has been removed and a confined space entry task is finished?

Accepted Answer

The entry permit must be closed out, isolation removal recorded, and the permit retained as per site records requirements

Answer

Only an incident report if something went wrong during entry

Answer

A new entry permit for the next scheduled entry must be pre-filled

Answer

The isolation record is discarded as it is no longer relevant once work is complete