If an employee takes a class per employer during his regular scheduled work hours is he required for his time. (Example if an employee in HVAC field takes a class on his normal schedule day, loosing on call time, should he be paid for those hours, an

If an employee takes a class per employer during his regular scheduled work hours is he required for his time. (Example if an employee in HVAC field takes a class on his normal schedule day, loosing on call time, should he be paid for those hours, and or travel time. If an employee is required to be available during a regular scheduled day, but has no service calls to go to, is the employer responsibable to pay for any compentation. (Example HVAC tech is required to be available but no calls come in during his regular scheduled time. Does the employer have to pay something to the employee to remain available. If the employee is not being paid anything, can he advise his employer he will not be available, and take work at another job?)