The term rubber refers to any of the natural or synthetic polymers having two main properties: deformation under strain and elastic recovery after vulcanization. What are these polymers called?

Which of the following is an abnormal finding of the pupils?

A) Constriction when focusing on a near object B) Both pupils constricting when a penlight is shone in one eye C) Slow but equal reaction to light D) Less than 2 mm difference in size with normal reaction to light

What causes concrete to spall when exposed to freezing or fire conditions?

A. The rapid expansions/contraction of the concrete B. The presence of excess moisture in the concrete C. The presence of excessive air pockets in the concrete D. The improper amount of aggregate used in the concrete.