Building Trade

An Englishman, an Irishman and a Scotsman applied for a job on a building site but The foreman was not anxious to employ them.
'Lift this two-ton boulder,' he said to The Englishman. The Englishman couldn't so he didn't get The job.
'Empty this thousand gallon tank with a teaspoon,' he said to The Scotsman. The Scotsman couldn't, so he didn't get The job either.
'Wheel a barrow of smoke across The site for me,' he said to The Irishman.
'Certainly,' said The Irishman, 'just fill it up for me.'