The thoroughness of Dreamworld's training procedures has been questioned on the eighth day of an inquest into the October 2016 tragedy at the Gold Coast theme park.
The inquest at the Southport Coroners Court is looking into the deaths of Cindy Low, Kate Goodchild, her brother Luke Dorsett and his partner Roozi Araghi following a malfunction of the Thunder River Rapids Ride.
Training and compliance officer Amy Crisp instructed junior ride operator Courtney Williams on the day of the tragedy.
Ms Williams was working her first shift as a load operator on the 30-year-old ride when the tragedy occurred.
She told the inquest last week she wasn't aware what an emergency stop button near the unload area did and hadn't pushed it during the tragedy because she believed she needed authority from the senior ride attendant.
On Wednesday Ms Crisp said Ms Williams had "nodded in acknowledgement" when she had explained the function and when to use the emergency stop button that morning.
She did not press the button to show Ms Williams how it operated and said at no point in her time at the park had she herself had to push the button.
"Touching of that button was not encouraged?" counsel assisting the coroner Ken Fleming QC asked Ms Crisp.
"In an emergency it was," Ms Crisp replied.
Mr Fleming also queried how water levels were monitored on the ride, with a "scum line" the only indicator of whether they had dropped or not.
"The water stain on the wall, that was the only measure you had to determine the water level?," Mr Fleming asked.
Ms Crisp replied it was but agreed it would have been easy for a maintenance staff member to paint a depth indicator on the wall if it had been deemed necessary.
On Tuesday video of a walk-through with police involving Ms Crisp days after the tragedy was played to the inquest.
Ms Crisp defends her training of Ms Williams in the video.
"I know that I showed her everything ... not once did I question my training," Ms Crisp tells detectives.
The inquest continues.