Impression materials( Dental materials ) is of liquid or semi-solid nature when first mixed and placed in the mouth. It then sets to become an elastic solid (usually takes a few minutes depending upon the material), leaving an imprint of a person’s dentition and surrounding structures of the oral cavity. Academictask provides 2000+ basic and advanced level of dental materials MCQs with answers. In this section, we focus on all areas of MCQs on dental materials subject and cover all important topics of impression material like Amalgams, Dental Cements, Direct Filling Gold, Gypsum Products Mcqs, Impression Materials, Metallurgy, Physical Properties, Dental Ceramics & Miscellaneous, Restorative Resins – and much more. All these topics are chosen from trusted and best reference books on dental and impression materials. These dental materials MCQs are also helpful for the preparation of interviews, entrance examinations, other competitive examinations, and certifications for all Experienced, Freshers and Students. Also, check MCQs on Pathology here.
201. The term ordered hardening heat treatment used in which of the following dental alloys ?
A. Gold-Copper
B. Nickel-Chromium
C. Nickel-Titanium
D. Silver-Palladium
202. Linear coefficient of thermal expansion of metal used for metal caramic restoration range from________________?
A. 11.5-12.5×10-6/°C
B. 10.5-11.5×10-6/°C
C. 13.5-14.5×10-6/°C
D. 16.5-17.5×10-6/°C
203. Quartz is added to gypsum bonded investment to______________?
A. Increase the strength
B. Counter balance contraction of gypsum during heating
C. aid in hygroscopic expansion
D. Increase the shelf life of investment
204. Annealing is also known as_______________?
A. Soft hardening treatment
B. Hard hardening treatment
C. Precipitating heat treatment
D. Stress relieving heat treatment
205. The best fuel gas when used with oxygen is______________?
A. Hydrogen
B. Natural gas
C. Propane
D. Acetylene
206. Which of the following fuel gases is the best choice of heat source to carry out soldering process ?
A. Propane
B. Acetylene
C. Natural gas
D. Hydrogen
207. Solder and flux used for joining Elgiloy wires are_____________?
A. Gold solder and borax flux
B. Gold solder and fluoride flux
C. Silver Solder and borax flux
D. Silver solder and fluoride flux
208. 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
209. The castability of chromium-cobait base metal alloys when compared to gold based noble metal alloys is_______________?
A. More
B. Less
C. Equal
D. Depends on the alloy type
210. In Base metal alloys, Corrosion resistance occurs due to___________________?
A. Passivity
B. High Fusion Temperature
C. High Molecular Weight
D. Co-efficient of Thermal Expansion