ROCKWELL TEST STUDY GUIDE QUESTIONS
AND SOLUTIONS 2026 CORRECT ANSWERS
GRADED A+
⩥ What mineral is at the top of the Mohs Hardness Scale? Answer:
Diamond (hardness of 10)
⩥ Which mineral has a hardness of 7 on the Mohs Hardness Scale?
Answer: Quartz
⩥ What is the hardness of Talc on the Mohs Hardness Scale? Answer: 1
(softest mineral)
⩥ What is the significance of the hardness test? Answer: It is simple,
inexpensive, and requires little preparation for specimens.
⩥ What is the Brinell hardness test? Answer: A test that measures the
diameter of indentation made by a ball under a specified load.
⩥ What loads are typically used in the Brinell hardness test? Answer:
500 to 3000 kg
AND SOLUTIONS 2026 CORRECT ANSWERS
GRADED A+
⩥ What mineral is at the top of the Mohs Hardness Scale? Answer:
Diamond (hardness of 10)
⩥ Which mineral has a hardness of 7 on the Mohs Hardness Scale?
Answer: Quartz
⩥ What is the hardness of Talc on the Mohs Hardness Scale? Answer: 1
(softest mineral)
⩥ What is the significance of the hardness test? Answer: It is simple,
inexpensive, and requires little preparation for specimens.
⩥ What is the Brinell hardness test? Answer: A test that measures the
diameter of indentation made by a ball under a specified load.
⩥ What loads are typically used in the Brinell hardness test? Answer:
500 to 3000 kg