1091. For an accurate impression the thickness of rubber base impression material should be :
A. At least 3 mm
B. More than 4 mm
C. About 2 mm *
D. Maximum in the area of operation
1092. To minimize distortion the die should be poured :
A. Within 24 hours
B. Within 2 hours
C. Within 30 Minutes *
D. After 1 Hour
1093. Inlay waxes used for the direct waxing procedure possess :
A. Minimum flow below 37 Degree *
B. Greater flow below 37 Degree
C. Minimum flow above 37 Degree
D. Greater flow above 37 Degree
1094. An ideal location to attach a sprue pin in a posterior restoration is :
A. Central fossa
B. Cusp tips
C. Marginal Ridge *
D. Contact point
1095. The most commonly used type of gold is :
A. Type I
B. Type II *
C. Type III
D. Type I and IV
1096. The alloys have a melting range of :
A. 1700- 1900 Degree F *
B. 1500- 1600 Degree F
C. 2300- 2380 Degree F
D. 4000 -5000 Degree F
1097. Removal of surface oxides from the casting is accomplished by :
A. Tempering
B. Pickling *
C. Annealing
D. Degassing
1098. In groove and post design of an anterior inlay the groove is placed on :
A. Incisal edge
B. Gingival wall
C. Axial wall *
D. Gingivo -axial line angle
1099. The incisal step for class IV inlay is indicated :
A. To arrest attritional wear *
B. When less than 1/4 of incisal lenght is involved
C. Both A and B
D. None of the above
1100. After Amalgam is polished the metal surface is fllatened This layer is called :
A. Deilby’s layer
B. Beelby’s layer *
C. Teelby’s layer
D. Whitby’s layer