Elastomers are_________________?

Related Mcqs:

1. Elastomers except: Polyether are_______________?

   A. Hydrophilic
   B. Hydrophobic
   C. Water loving impression materials
   D. Potassium alginates

2. The major intestinal pathogens which are non-lactose fermenters are_________________?

   A. Salmonella
   B. Klebsiella
   C. Escherichia
   D. Paracolons

3. Toxoids are_________________?

   A. antigenic and toxic
   B. antigenic and non-toxic
   C. non-antigenic and toxic
   D. non-antigenic and non-toxic

4. In Troisiers sign the lymph nodes involved are_________________?

   A. Right axillary nodes
   B. Left axillary nodes
   C. Right supraclavicular nodes
   D. Left supraclavicular nodes

5. Oncogenic viruses in human are_________________?

   A. HPV
   B. EBV
   C. Hepatitis -B virus
   D. All of the above

6. Hysteresis in a hydrocolloid gel is______________?

   A. Moisture absorption
   B. Temperature lag between gelation and liquefaction temperature
   C. Phenomenon of conversion of gel into sol
   D. All of the above

7. Impression compound has which of the following characteristic property ?

   A. Low thermal conductivity
   B. High flow property
   C. Degradation is presence of moisture
   D. Remain distortion free up to 72 hrs. pouring can be safely delayed

8. Impression compound is characterized by all of the following except_______________?

   A. Warps at room temperature
   B. Is a thermoset material
   C. Shows increased flow when kneaded with water
   D. Low coefficient of thermal conductivity

9. What is the minimum thickness of the elastomeric impression material for an accurate impression_______________?

   A. 2 mm
   B. 2-4 mm
   C. Greater than 3 mm
   D. Maximum in the area of operation

10. The best way to remove a hydrocolloid impression from the patient’s mouth is____________?

    A. Slight rocking of the impression to disengage it from the undercut
    B. Wetting the periphery of the impression with moist cotton to break the peripheral seal
    C. Sudden jerking of the impression to prevent tearing
    D. Supporting the impression along with the tray to prevent disengaging of the tray alone