Gypsum Product III

Gypsum Product III

Professional Development

20 Qs

quiz-placeholder

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Gypsum Product III

Gypsum Product III

Assessment

Quiz

Education

Professional Development

Practice Problem

Hard

Created by

Abhishek Bhagat

Used 14+ times

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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Working time of gypsum products can be increased by

Using slurry water for mixing

Faster spatulation

Increasing the water: powder ratio

Increasing the time of mixing within practical limits

2.

DROPDOWN QUESTION

1 min • 1 pt

The length & Diameter of Vicat penetrometer are

(a)  

1cm, 1 mm
5cm, 1mm
1cm, 5mm
5cm, 5 mm

3.

DRAG AND DROP QUESTION

1 min • 1 pt

Accelerators and retarders are used with gypsum products mainly to control

(a)  

Mixing time
Setting time
Setting expansion
Strength of the set product

4.

DRAG AND DROP QUESTION

1 min • 1 pt

Which is the most commonly used accelerator in gypsum product?

(a)  

Aluminum sulfate
Potassium fluoride
Potassium sulfate
Sodium fluoride

5.

DRAG AND DROP QUESTION

1 min • 1 pt

A gypsum cast can be safely removed from the impression at the end of

(a)  

Final setting time
Initial setting time
Mixing time
Working time

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A retarder can slow down the setting reaction of dental stone by the following mechanism:

Enhancing the solubility of hemihydrate

Increasing the precipitation of dihydrate

Inhibiting the crystal growth

Providing greater number of nuclei of crystallization

7.

DRAG AND DROP QUESTION

1 min • 1 pt

The main purpose of adding modifiers to gypsum products is to modify their

(a)  

Rate of reaction
Setting expansion
Strength
Surface hardness

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