Dental Materials Quiz 7
1 / 50
Wash or corrective impression is done by______________?
2 / 50
Most commonly used retarder in gypsum_____________?
3 / 50
Which of the following is common to both zinc eugenol cement and polycarboxylate cement?
4 / 50
The wetting of an adherent surface by an adhesive is related to________________?
5 / 50
KHN value of Amalgam is_________________?
6 / 50
Trisodium phosphate in alginate acts are_______________?
7 / 50
Cold cure acrylic expand in water by___________?
8 / 50
Which of the following is NOT true of polymethyl methacrylate ?
9 / 50
Flux is used during casting to________________?
10 / 50
Trisodium phosphate added to alginate contributes towards_______________?
11 / 50
The gold alloys used for casting contain at least?. percent of precious metal according to ADA specification number 5________________?
12 / 50
Cavo surface angle for amalgam resoration is butt joint as____________?
13 / 50
Thermal conductivity of which material is close to dentin____________?
14 / 50
Deformation that is recovered upon removal of an externally applied force or pressure is known as_____________?
15 / 50
The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?
16 / 50
In measuring Vickers hardness no. Which of the following is used________________?
17 / 50
High copper amalgam can be produced_____________?
18 / 50
Plaster mix____________?
19 / 50
Compressive stress is computed by dividing the external force by the_______________?
20 / 50
Component of inlay wax which makes it flake resistant is_____________?
21 / 50
Frozen slab technique of mixing zinc phosphate is used for_______________?
22 / 50
The castability of chromium-cobait base metal alloys when compared to gold based noble metal alloys is_______________?
23 / 50
The most commonly used accelerator in gypsum product is___________________?
24 / 50
Which of the following may result if an excessive amount of monomer is incorporated into an acrylic resin mixture ?
25 / 50
Back pressure porosity can be avoided by________________?
26 / 50
Which cement base has the highest modulus of elasticity ?
27 / 50
In amalgam alloy which acts as oxygen scavenger_____________?
28 / 50
The malleting force is directed______________?
29 / 50
Dentin bonding agents usually contain_____________?
30 / 50
Which one of the following dental cements does not contain water as part of the composition of the liquid component ?
31 / 50
Alginate impression material is________________?
32 / 50
The preferred material for repair of fractured denture base is______________?
33 / 50
The simplest alloy is a_______________?
34 / 50
Ultimate tensile strength refers to_________________?
35 / 50
Along with polymerisation shrinkage, one of the major disadvantages of polymethyl methacrylate as denture base resin are its poor_____________?
36 / 50
Which of the following is the main constituent of porcelain__________________?
37 / 50
Torsional force is_______________?
38 / 50
Dentin conditioner has the following function______________?
39 / 50
Discolouration of silver alloy is due to_____________?
40 / 50
The polymerization of self-curing resin takes faster in______________?
41 / 50
Sub surface porosity can be decreased by_______________?
42 / 50
To prevent porosity in dental porcelain it should be backed________________?
43 / 50
Which is not present in porcelain________________?
44 / 50
Agar impression materials differ from alginate impression materials in that the former sets by_______________?
45 / 50
Incomplete casting is the result of_____________?
46 / 50
The modulus of elasticity is defined as_______________?
47 / 50
Which one of the following categories of dental materials has the highest thermal conductivity_________________?
48 / 50
A crystal in metal substructure is_______________?
49 / 50
The most commonly used, most biocompatible and adhesive cement is______________?
50 / 50
When making a polysulphide impression for a caste crown, custom trays are usually preferred over stock trays for all of the following reasons except_______________?
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