Presidential hopeful Mitt Romney may be a former financial whiz, but after his latest unfortunate comments, it appears engineering and basic chemistry are not among his strong points.

The gaffe-prone Republican nominee has once again put his foot in it after he was recorded questioning why jet aircraft don’t have windows that can be opened by passengers from the inside.

Romney reportedly made the comment during a $6 million fundraiser in California last Saturday, as he spoke about how his wife Ann’s jet was forced to make an emergency landing.

“I appreciate the fact that she is on the ground, safe and sound. And I don’t think she knows just how worried some of us were,” Romney said, according to the L.A. Times.

“When you have a fire in an aircraft, there’s no place to go, exactly, there’s no — and you can’t find any oxygen from outside the aircraft to get in the aircraft, because the windows don’t open. I don’t know why they don’t do that. It’s a real problem.”

“So it’s very dangerous. And she was choking and rubbing her eyes. Fortunately, there was enough oxygen for the pilot and copilot to make a safe landing in Denver. But she’s safe and sound.”

Ann Romney’s flight from Omaha, Neb., to Santa Monica, Calif., had to make an emergency landing in Denver on Friday after an electrical problem caused the cabin to fill with smoke.

Opening a window at a high altitude would not only provide oxygen to fuel any fire, but it would also cause a dangerous loss of cabin pressure.

The latest gaffe follows the release of a secretly recorded video that captured Romney saying: “There are 47 percent of the people who will vote for the president no matter what.”

"There are 47 percent who are with him, who are dependent on government, who believe that, that they are victims, who believe that government has the responsibility to care for them. Who believe that they are entitled to health care, to food, to housing."

In addition, Romney joked at the event that he would be more successful in his White House bid if his father were actually Latino, rather than having been born in Mexico to non-Latino missionary parents who emigrated from the United States.