Question

multiple choice 1 point
the most common cause of back strain is
bending and twisting while lifting.
lifting more than 30 pounds.
lifting while keeping the back straight.
pushing heavy equipment on wheels.
multiple choice 1 point
which of the following statements does not apply to the rules of body mechanics?
use a wide base of support.
keep your load out beyond the front of your body.
bend your knees when you lift heavy objects.
avoid pulling or lifting heavy objects.

Explanation:

For question 8, bending and twisting while lifting puts extra stress on the back muscles and ligaments, making it a common cause of back - strain. For question 9, keeping the load out beyond the front of the body is not a rule of body mechanics as it can increase the risk of losing balance and straining the back. The rules include using a wide base of support, bending knees when lifting, and avoiding pulling or lifting heavy objects when possible.

Answer:

1. bending and twisting while lifting.
2. Keep your load out beyond the front of your body.