- A. Methyl and ethyl mercury
- B. Mercury vapour
- C. Inorganic mercury forms
- D. Mercury sulphide
Dental Materials (MCQs)
-
The most toxic form of mercury is_____
-
For porcelain fused to metal crown, the porcelain should have ______
- A. High fusion expansion
- B. High fusion temperature
- C. Linear coefficient of thermal expansion less than that of metal
- D. Linear coefficient of thermal expansion more than that of metal
-
Crocus cloth is____
- A. Emery
- B. Garnet
- C. Pumice
- D. Rouge
-
The ideal temperature of water bath for softening fluid wax is about_______
- A. 51 to 54 degree F
- B. 51 to 54 degree C
- C. 70 to 75 degree F
- D. 70 to 75 degree C
-
Super abrasive is______
- A. Sand
- B. Silicon arbide
- C. Diamond
- D. Aluminum oxide
-
Dispersion of crystalline phase to strengthen ceramics results in______
- A. dispersed porcelain
- B. Glazed porcelain
- C. aluminium porcelain
- D. All of the above
-
The preferred material for repair of fractured denture base is____
- A. Chemically cure resin
- B. Heat curve resin
- C. Light cure resin
- D. Vinyl resin
-
The maximum shrinkage during firing proces in ceramic occurs in_______
- A. High Bisque stage
- B. Low Bisque stage
- C. Medium Bisque stage
- D. Fusion stage
-
Coefficient of thermal expansion of metal-ceramic alloys is_____
- A. Same as porcelain
- B. More than porcelain
- C. Less than porcelain
- D. More than or equal to porcelain but not less
-
Stage recognized in the firing of dental porcelain given below. Which of state is not correct ?
- A. Cold stage bisque
- B. Low bisque
- C. Medium bisque
- D. High bisque