A. ¼ inch
B. ½ inch
C. 3/8 inch
D. one inch
Related Mcqs:
- Asbestos liner is used in a casting ring to________________?
A. Facilitate venting of the mold
B. Retard the heating of the investment
C. Permit expansion of the world
D. All of the above - Wax pattern is ideally invested immediately to decrease the dimensional changes caused by_______________?
A. Decrease flow
B. Continuous expansion
C. Relaxation of the internal stresses
D. Water loss - The sprue in wax pattern should be placed________________?
A. At right angle
B. At 45°C angle
C. At obtuse angle
D. It depend upon type of wax pattern - The tonsillar ring or Waldeyer’s ring consists of which of the following ________________?
A. The adenoid
B. The lingual tonsil
C. The tonsil
D. All of the above - The time gap between appearance of Koplik’s spot and cutaneous rash in measles is________________?
A. 24 Hrs
B. 3-4 days
C. 2 weeks
D. 10 days - Crucible indicated for casting base metal alloys is______________?
A. Carbon crucible
B. Clay crucible
C. Quartz crucible
D. High melting plastic crucible - Fins and spines on the casting is seen due to_______________?
A. Prolonged heating:
B. Rapid heating me
C. Water film contamination
D. Too high pressure during casting - Suck back porosity in the casting can be eliminated by________________?
A. Increasing the mould metal temperature difference
B. Increasing the flow of molten metal
C. Flaring the point of the sprue attachment
D. All of the above - Impurities in casting is removed by________________?
A. Annealing
B. Degassing
C. Pickling
D. Conditioning - The gold alloys used for casting contain at least…. percent of precious metal according to ADA specification number 5________________?
A. 55
B. 65
C. 75
D. 85
