Medical Mcqs Practice Test

Question 1

A rough / Chalky surface of the cast is due to_______________?

Accepted Answer

D.	All of the above

Question 2

The setting expansion of gypsum products can be reduced by________________?

Accepted Answer

B.	Adding potassium sulfate

Question 3

Most commonly used retarder in gypsum_____________?

Accepted Answer

C.	Citrales

Question 4

Gypsum product having least expansion_____________?

Accepted Answer

D.	Die stone

Question 5

Gillmore needle is used for_______________?

Accepted Answer

B.	Evaluating the setting time of plaster of pris

Question 6

Setting of POP is result of______________?

Accepted Answer

A.	Difference in solubility of CaSo4 ½ H2O + CaSO4+ 2H2O

Question 7

Type I gypsum product is also called_______________?

Accepted Answer

A.	Impression plaster

Question 8

Plaster of paris _____________?

Accepted Answer

B.	Has porous and irregular crystals

Question 9

As per DNA No. 25, minimum amount of setting expansion required for type V gypsum products_______________?

Accepted Answer

B.	0.10

Question 10

The main difference between dental stone and dental plaster is______________?

Accepted Answer

C.	Sharpe and size of particles

Question 11

Gypsum is used for________________?

Accepted Answer

D.	Casts and Dies

Question 12

The strength of the gypsum specimen when the water in excess of that required for the hydrate of the hemihydrate is left in the specimen is called____________?

Accepted Answer

B.	Green strength

Question 13

Balanced stone is dental stone_______________?

Accepted Answer

B.	In which accelerators or retarders have been added according to need

Question 14

Impression plaster containing potato starch is called______________?

Accepted Answer

B.	Soluble plaster

Question 15

Powders of dental plaster and dental stone differ mainly in____________?

Accepted Answer

D.	Particle porosity

Question 16

Beta hemihydrate particles absorb______________?

Accepted Answer

A.	More water

Question 17

Type III Dental gypsum is__________________?

Accepted Answer

C.	Class I stone or hydrocal

Question 18

The product, which is obtained by calcining gypsum under steam pressure at 120-130°C or by dehydrating gypsum in the presence of sodium succinate is_______________?

Accepted Answer

A.	Alpha – hemihydrates

Question 19

The strength of gypsum prouducts is generally expressed in terms of______________?

Accepted Answer

D.	compressive strength

Question 20

The function of 2% potassium sulphate in a gypsum product is_____________?

Accepted Answer

B.	Regulate setting time