# Concrete Technology Questions and Answers – Compression Test

This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “Compression Test”.

1. Tensile test can be performed on _____________
a) Impact testing machine
b) Universal testing machine
c) Rockwell tester
d) Brinell tester

Explanation: Tensile testing, also known as tension testing, is a fundamental material science test in which a sample is subjected to a controlled tension until failure.

2. Which machine records the change in length of specimen?
a) Impact testing machine
b) Universal testing machine
c) Rockwell tester
d) Brinell tester

Explanation: A universal testing machine (UTM), also known as a universal tester, materials testing machine or materials test frame, is used to test the tensile strength and compressive strength of materials.

3. The ability of the material to resist stress without failure is called ________________
a) Strength
b) Hardness
c) Stiffness
d) Toughness

Explanation: The ability of the material to resist stress without failure is called as strength.

4. In universal testing machine, for a circular section specimen, the gauge length is taken to be ______________
a) 3.65 √A
b) 4.65 √A
c) 5.65 √A
d) 6.65 √A where A is the area of cross section of the specimen

Explanation: It is the formula to find the gauge length when we have the area of the specimen.

5. The shape of specimen used in compression test is Cube and cylinder.
a) True
b) False

Explanation: The shape of specimen used in compression test is Cube and cylinder.
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6. During compression test of cast iron, the failure occurs i.e. the crack appears along the _____________
a) Diagonal
b) Surface parallel to load applied
c) Surface perpendicular to load applied
d) Lateral

Explanation: During compression test of cast iron, the failure occurs i.e. the crack appears along the diagonal.

7. The property of a material that resists penetration or indentation by means of abrasion or scratching is known as ___________
a) Strength
b) Hardness
c) Stiffness
d) Toughness

Explanation: The property of a material that resists penetration or indentation by means of abrasion or scratching is known as hardness.

8. The indenter used in Brinell hardness test is a ____________
a) Ball
b) Cone
c) Cylinder
d) Pyramid

Explanation: The Brinell method applies a predetermined test load (F) to a carbide ball of fixed diameter (D) which is held for a predetermined time period and then removed.

9. For hardness test of copper in Brinell hardness tester, the diameter of ball is ___________
a) 7mm
b) 1mm
c) 5mm
d) 3mm

Explanation: ASTM E-10 is a standard test for determining the Brinell hardness of metallic materials. The load applied in this test is usually 3,000, 1,500, or 500 kgf, so that the diameter of the indentation is 5 mm.

10. In charpy test specimen, the angle of v-notch section is ____________
a) 30 degrees
b) 45 degrees
c) 60 degrees
d) 90 degrees

Explanation: In charpy test specimen, the angle of v-notch section is 45 degrees and 0.25mm radius along the base.

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