Medical Mcqs Practice Test

Question 1

Which of the following fuel gases is the best choice of heat source to carry out soldering process ?

Accepted Answer

A.	Propane

Question 2

Solder and flux used for joining Elgiloy wires are_____________?

Accepted Answer

D.	Silver solder and fluoride flux

Question 3

Fins and spines on the casting is seen due to_______________?

Accepted Answer

B.	Rapid heating me

Question 4

The castability of chromium-cobait base metal alloys when compared to gold based noble metal alloys is_______________?

Accepted Answer

B.	Less

Question 5

In Base metal alloys, Corrosion resistance occurs due to___________________?

Accepted Answer

A.	Passivity

Question 6

The solvent flux used for base metal soldering is_______________?

Accepted Answer

A.	Borax

Question 7

During soldering, the solidus temperature of the filler material should be_____________?

Accepted Answer

B.	Lesser than the substrate material

Question 8

Which of the following increases castability of base metal alloys________________?

Accepted Answer

B.	Beryllium

Question 9

Which of the following fuel gases used for soldering, has the highest heat content______________?

Accepted Answer

D.	Propane

Question 10

Binder in phosphate bonded investment is______________?

Accepted Answer

C.	Magnesium oxide & Monoammonium phosphate

Question 11

Which one of the following elements is NOT added is small amount to be used as grain refiners ?

Accepted Answer

D.	Platinum

Question 12

Within an hour after cementation of cast gold onlay patient complains of shooting pain every time the teeth comes together Most probable explanation is ______________?

Accepted Answer

D.	Galvanic current caused by gold onlay occluding with a large restoration

Question 13

The rate of tarnish and corrosion of class II cast material having VHN 200 is_______________?

Accepted Answer

A.	0%

Question 14

Function of wetting agents used in casting procedure is_________________?

Accepted Answer

C.	To reduce contact angle of liquid with max surface

Question 15

The deoxidizing agent added to dental alloys is______________?

Accepted Answer

D.	Zinc

Question 16

Which of the following is function of fluoride flux in soldering process ?

Accepted Answer

B.	It prevents the formation of chromium oxide or dissolves chromic oxide layer

Question 17

Percentage of gold in high noble alloy is______________?

Accepted Answer

C.	>40%

Question 18

Gases dissolved in molten metals are liberated when cooled giving rise to________________?

Accepted Answer

B.	Gas inclusion porosity

Question 19

Casting flux is used to_______________?

Accepted Answer

C.	Flaring the point of the sprue attachment

Question 20

The main ingredient of inlay wax is__________________?

Accepted Answer

B.	Paraffin wax