Gypsum Product - Final

Gypsum Product - Final

Professional Development

20 Qs

quiz-placeholder

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Gypsum Product - Final

Gypsum Product - Final

Assessment

Quiz

Education

Professional Development

Hard

Created by

Abhishek Bhagat

Used 5+ times

FREE Resource

20 questions

Show all answers

1.

DRAG AND DROP QUESTION

1 min • 1 pt

Which gypsum product has the highest surface hardness?

(a)  
Type II
Type III
Type IV
Type V

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main purpose of adding potato starch to impression plaster?

Better dimensional stability

Easy separation of cast from the impression

More accurate impression

Prolong the working time

3.

DRAG AND DROP QUESTION

1 min • 1 pt

The α & β hemihydrates differ mainly in terms of thei

(a)  
Chemical composition
Particle shape & size
Shelf life
Solubility in water

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Setting of die stone is the result of

Difference in the solubility of CaSo4 . ½ H O & CaSO4.2H O

Nucleation & growth of CaSo4 . ½ H2O crystals

Precipitation of CaSo4 . ½ H2O crystals

Reaction between CaSO4 .2H2O and water

5.

DROPDOWN QUESTION

1 min • 1 pt

The strength of gypsum products is generally expressed in terms of

(a)  
Compressive strength
Flexural strength
Green strength
Tensile strength

6.

DRAG AND DROP QUESTION

1 min • 1 pt

Dental plaster

(a)  
Has porous and irregular crystals
Has water: powder ratio of 0.22
Is wet calcined hemihydrate
Is α-hemihydrate

7.

DRAG AND DROP QUESTION

1 min • 1 pt

The main reason why higher water: powder ratio should be avoided during manipulation of die stone is, because it

(a)  
Decreases setting expansion
Decreases strength
Decreases working time
Increases setting time

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