Q.1:
All of the following statements about the differences between self-polymerizing acrylic resins and heat-cured resins are true EXCEPT______________?
A.
The former have a lower molecular weight(
B.
The former have higher residual monomer content/
C.
The former are more porous
D.The former have greater transverse strength+
Q.2:
If curing occurs at temperature more than 100C porosity results in which area of denture______________?i
A.1.Hard thick central area
B.
2.Thin Palatal area
C.
3.Thin area of flanges
D.
4.Porosity is uniformly distributed#
Q.3:
Use of dimethyl-P-toluidine is indicated for_______________?<
A.
Thermal polymerization of acrylic!
B.Chemical polymerization
C.
Retarding the polymerization reaction%
D.
To inhibit the action of benzoyl peroxide)
Q.4:
Acrylic (cold cure)______________?"
A.
Melts at 100C
B.
Softens at 100C
C.
Still requires heat for polymerization&
D.Produces heat during polymerization#
Q.5:
Radio opacity to composite resins is rendered by_______________?@
A.
Silica glass
B.
Organic matrix
C.Barium glass and strontium glasses"
D.
Fluoride particles
Q.6:
The most important disadvantage of acrylic denture base is_______________?J
A.
porosity
B.Shrinkage
C.
Tooth breakage
D.
Water absorption
Q.7:
Which of the following constituents is common in occlusal sealants, bonding agents, composite resins ?f
A.BIS GMA
B.
Polymethyl methacrylate
C.
Benzoin methyl ether
D.
Silica filter
Q.8:
The function of the coupling agent in a restorative resin is to allow______________?T
A.
Adhesion of resin particles
B.
Bonding between filler crystals
C.
Bonding between filler and resin
D.Bonding between tooth and resin
Q.9:
No trail closure is necessary with which one of the technique during denture fabrication_____________?f