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.Management Sciences
Category: Physical Properties
The simplest alloy is a_______________?
A. Solid solution
B. Eutectic alloy
C. Peritectic allowy
D. Ternary alloy
Which of the following hardness test is a micro hardness test ?
A. Brinnel
B. Knoop
C. Shore-A
D. Rockwell
Flow of a material refers to_______________?
A. Continued change of the material under a given load
B. The consistency of material when mixing
C. The homogencity of gypsum products
D. Dimensional change of the material during settings
In measuring Vickers hardness no. Which of the following is used________________?
A. Spherical indenter
B. Steel ball indentation
C. Rhomboid shaped indenter
D. 136-degree diamond pyramid
Property of the material, which describes the resistance to abrasion, is_________________?
A. Hardness
B. Yield strength
C. Modulus of elasticity
D. None of the above
The Knoop Hardness Number of Microfilled composite Restorative material ranges from____________?
A. 50 – 60 KHN
B. 25 – 35 KHN
C. 15 – 20 KHN
D. 40 – 48 KHN
Modulus of elasticity means_______________?
A. Rigidity or stiffness of the material
B. Ability to be stretched with permanent deformation
C. Ductility of a material
D. Malleability of the metal
The melting point of silver is_____________?
A. 1063° centigrade
B. 960° Centigrade
C. 850° Centrigrade
D. 1123° Centrigrade
The modulus of elasticity is defined as_______________?
A. The stress at the proportional limit
B. The strain at the proportional limit
C. The stress/strain ratio within the proportional limit
D. None of the above
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