Which of the following explains why truck drivers are required to take a rest period after a certain period of driving? Drivers get cash bonuses for resting at eight-hour intervals.
Rest periods cut down on the number of gas emissions in the atmosphere.
Their trucks need sufficient time between rides to cool down and not overheat.
Rest periods prevent accidents caused by lack of sleep.

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

What is a monomer? how do they form a ploymer from the view point of chemical bonding?

The air in an automobile tire with a volume of 0.015 m3 is at 32°c and 140 kpa gage. determine the amount of air that must be added to raise the pressure to the recommended value of 206 kpa gage. assume the atmospheric pressure to be 128 kpa and the temperature and the volume to remain constant.[r-0.287 kj/kgk]