4. In washing machines, what keeps us from touching its fast spinning dryer?
a. It starts spinning only when the cover is in place.
b. It has proximity sensors that switch it off when a person is near.
c. There is a big warning saying: Do not touch while still running.
d. You can safely touch it even while it moves.
5. Why is it more important to avoid slippery spots on ramps than on a level pavement?
a. Just hold on to the handrails and you'll be alright.
b. Slipping on a ramp will hurt more than slipping on a level pavement.
c.No such slippery spots on ramps because water runs down, while it forms puddles on a level pavement. .
d. You'll need friction just to stand upright on a ramp, while on a level pavement, you can a stand even if it is slippery. ​