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Medical Mcqs

Modern dental noble metal casting alloys generally have equiaxed fine grain structures because of the incorporation of small amounts of______________?

July 31, 2021July 25, 2019 by admin
Modern dental noble metal casting alloys generally have equiaxed fine grain structures because of the incorporation of small amounts of______________?

A. Chromium
B. Indium
C. Irridium
D. Palladium

Categories Dental Materials, Medical Mcqs, Metallurgy

Nickel is added to wrought gold alloys as______________?

July 31, 2021July 25, 2019 by admin
Nickel is added to wrought gold alloys as______________?

A. Strengtherner
B. Hardener
C. Whitens the alloy
D. Scavenger

Categories Dental Materials, Medical Mcqs, Metallurgy

Stages of annealing in order_________________?

July 31, 2021July 25, 2019 by admin
Stages of annealing in order_________________?

A. Recovery recrystallization grain growth
B. Recrystallization recovery, grain growth
C. Grain Growth Recrystallization recovery
D. Melting point, grain growth, Recrystallization

Categories Dental Materials, Medical Mcqs, Metallurgy

The term ordered hardening heat treatment used in which of the following dental alloys ?

July 31, 2021July 25, 2019 by admin
The term ordered hardening heat treatment used in which of the following dental alloys ?

A. Gold-Copper
B. Nickel-Chromium
C. Nickel-Titanium
D. Silver-Palladium

Categories Dental Materials, Medical Mcqs, Metallurgy

Linear coefficient of thermal expansion of metal used for metal caramic restoration range from________________?

July 31, 2021July 25, 2019 by admin
Linear coefficient of thermal expansion of metal used for metal caramic restoration range from________________?

A. 11.5-12.5×10-6/°C
B. 10.5-11.5×10-6/°C
C. 13.5-14.5×10-6/°C
D. 16.5-17.5×10-6/°C

Categories Dental Materials, Medical Mcqs, Metallurgy

Quartz is added to gypsum bonded investment to______________?

July 31, 2021July 25, 2019 by admin
Quartz is added to gypsum bonded investment to______________?

A. Increase the strength
B. Counter balance contraction of gypsum during heating
C. aid in hygroscopic expansion
D. Increase the shelf life of investment

Categories Dental Materials, Medical Mcqs, Metallurgy

Annealing is also known as_______________?

July 31, 2021July 25, 2019 by admin
Annealing is also known as_______________?

A. Soft hardening treatment
B. Hard hardening treatment
C. Precipitating heat treatment
D. Stress relieving heat treatment

Categories Dental Materials, Medical Mcqs, Metallurgy

The best fuel gas when used with oxygen is______________?

July 31, 2021July 25, 2019 by admin
The best fuel gas when used with oxygen is______________?

A. Hydrogen
B. Natural gas
C. Propane
D. Acetylene

Categories Dental Materials, Medical Mcqs, Metallurgy

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

July 31, 2021July 25, 2019 by admin
Which of the following fuel gases is the best choice of heat source to carry out soldering process ?

A. Propane
B. Acetylene
C. Natural gas
D. Hydrogen

Categories Dental Materials, Medical Mcqs, Metallurgy

Solder and flux used for joining Elgiloy wires are_____________?

July 31, 2021July 25, 2019 by admin
Solder and flux used for joining Elgiloy wires are_____________?

A. Gold solder and borax flux
B. Gold solder and fluoride flux
C. Silver Solder and borax flux
D. Silver solder and fluoride flux

Categories Dental Materials, Medical Mcqs, Metallurgy
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