lung function tests. Lung function tests, also called pulmonary function tests, measure the size of a person's lungs, how much air can be breathed in and out, how fast air can be breathed out, and how well the person's lungs deliver oxygen to the blood.
Weekly Limit. The maximum number of hours most employees can be required to work in a week is 48 hours. The weekly maximum can be exceeded only if there is a written agreement between the employee and employer and the employer has received the approval of the Director of Employment Standards.
For most adult workers, there are no limits on daily work hours. Theoretically, employers may schedule employees to work seven days a week, 24 hours per day, so long as minimum wage and overtime laws are observed. Manufacturing employees are limited to 13 hours of work in a 24-hour period. There are also daily and weekly limitations on the hours minors (employees under 18) can work.