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Medical Mcqs

Compressive stress is computed by dividing the external force by the_______________?

July 31, 2021July 25, 2019 by admin
Compressive stress is computed by dividing the external force by the_______________?

A. Area of the test specimen upon which the weight rests
B. Elasticity of the test specimen in strain
C. Length of the test specimen beneath the force
D. Strain of the test specimen per unit length

Categories Dental Materials, Medical Mcqs, Physical Properties

The proportional limit is defined as______________?

July 31, 2021July 25, 2019 by admin
The proportional limit is defined as______________?

A. The maximum stress in a structure
B. The minimum force required to cause a structure to break
C. The maximum stress that can be induced without permanent deformation
D. The maximum elongation under tension that can be measured before failure

Categories Dental Materials, Medical Mcqs, Physical Properties

Stress in defined as_______________?

July 31, 2021July 25, 2019 by admin
Stress in defined as_______________?

A. An applied load or force
B. A deformation resulting from an applied load
C. An external force opposing an applied load
D. An internal force opposing an applied load

Categories Dental Materials, Medical Mcqs, Physical Properties

Setting expansion is advantageous in__________________?

July 31, 2021July 25, 2019 by admin
Setting expansion is advantageous in__________________?

A. Casts
B. Models
C. Investment
D. Dies

Categories Dental Materials, Medical Mcqs, Metallurgy

Back pressure porosity can be avoided by________________?

July 31, 2021July 25, 2019 by admin
Back pressure porosity can be avoided by________________?

A. Using asbestos linear
B. Placing the sprue at least one quarter inch away form the end of casting ring
C. Preventing rapid heating the investment in burnout oven
D. Using a short and wide sprue

Categories Dental Materials, Medical Mcqs, Metallurgy

Which of the following zones is used for melting alloy during casting______________?

July 31, 2021July 25, 2019 by admin
Which of the following zones is used for melting alloy during casting______________?

A. Reducing flame
B. Oxidizing flame
C. Green flame
D. All of the above

Categories Dental Materials, Medical Mcqs, Metallurgy

Cleaning of base metal alloy is done by______________?

July 31, 2021July 25, 2019 by admin
Cleaning of base metal alloy is done by______________?

A. Warm HCI
B. Cold HF
C. Cold H2SO4
D. Sand blasting with aluminium oxide

Categories Dental Materials, Medical Mcqs, Metallurgy

Which one of the following is most elastic ?

July 31, 2021July 25, 2019 by admin
Which one of the following is most elastic ?

A. a titanium
B. B titanium
C. Chrome-cobalt-nickel
D. Nickel-titanium

Categories Dental Materials, Medical Mcqs, Metallurgy

A thinner mix of a gypsum bonded investment will_______________?

July 31, 2021July 25, 2019 by admin
A thinner mix of a gypsum bonded investment will_______________?

A. Produce a smoother casting
B. Decrease setting expansion
C. Increase setting expansion
D. Increase thermal expansion

Categories Dental Materials, Medical Mcqs, Metallurgy

Stainless steel orthodontic wire can be hardened by________________?

July 31, 2021July 25, 2019 by admin
Stainless steel orthodontic wire can be hardened by________________?

A. Tempering
B. Work hardening
C. Age hardening
D. Precipitation hardening

Categories Dental Materials, Medical Mcqs, Metallurgy
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