28. Powdered glass test is performed to examine leaching potential of ....
a. Exterior structure of glass
b. Plastic containers
c. Interior structure of glass
d. Intact surface of glass

29. Which one of the following is not the principle problem area exist in plastic
containers.
a. Leaching
b. Permeation
c. Hardness
d. Sorption

30. Sulphur is used as a........
a. Surface coating material of glass
b. vulcanizing (curring) agent for rubber
c. In manufacturing of leaching proof plastic
d. None of the above

31. Which one of the test is not performed for rubbers?
a. Sterility
b. Humidity
c. Self sealability
d. Fragmentation

32. The efficiency of HEPA filter is:
a. Removes 97.99% particles of size 0.3 micron
b. Removes 99.97 % particles of size 0.3 micron
c. Removes 97.99% particles of size 0.5 micron
d. Removes 99.99% particles of size 0.3 micron