Hardness testing MCQ

Test your knowledge with important Hardness testing MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Hardness testing MCQs at Bissoy

• Brinell hardness numbers of materials are identical to ________ hardness numbers.
  ক

  Set method

  খ

  Extension under load

  গ

  Shore scleroscope

  ঘ

  Vickers
• In case of shore scleroscope hardness, the number considered is the average of __________ determinations.
  ক

  5

  খ

  26

  গ

  1

  ঘ

  333
• Which if the following is suggested in the shore scleroscope test to obtain the exact value?
  ক

  Instrument should be in sunlight

  খ

  Instrument should be spray painted

  গ

  Instrument should be fixed rigidly

  ঘ

  Instrument should be in sleeping position
• The shore scleroscope hardness test is carried out by ________ a tiny diamond-pointed hammer from a particular altitude and comparing the altitude of rebound to a standard test material.
  ক

  inserting

  খ

  cutting

  গ

  smoothly pressing

  ঘ

  dropping
• The loading used for a homogenous specimen in the bucket’s hardness test is _______
  ক

  30kg

  খ

  500kg

  গ

  5kg

  ঘ

  13kg
• The penetrator in the Vickers hardness test is a pyramid that is squarely based and has an included angle of _______
  ক

  206°

  খ

  15°

  গ

  136°

  ঘ

  23°
• The Vickers hardness test consists of a _________ penetrator.
  ক

  diamond

  খ

  steel ball

  গ

  carbon

  ঘ

  iron
• Similar hardness testing machines give the exact same results.
  ক

  True

  খ

  False
• What should be done to avoid deflection caused by depression?
  ক

  Plating

  খ

  Unique direction

  গ

  Smooth surface

  ঘ

  Required edge distance
• Which of the following is not a process or property that influences the hardness of a material?
  ক

  Buffing

  খ

  Storing

  গ

  Porous areas

  ঘ

  Decarburizing
• Which of the following hardness testing method is preferred for aircraft manufacturing purposes?
  ক

  Brinell hardness

  খ

  Rockwell hardness

  গ

  Divider method

  ঘ

  Shore scleroscope hardness
• In the beginning of the Rockwell hardness experiment, the reading dial is set to _____
  ক

  100

  খ

  50

  গ

  0.1

  ঘ

  0
• To find a true hardness reading for hard steel, the minimum thickness required for material is ____
  ক

  0.0027mm

  খ

  6.858mm

  গ

  0.27mm

  ঘ

  234mm
• The Rockwell hardness testing method typically uses certain amounts of load. Which of the following is not one of the loads used?
  ক

  150kg

  খ

  60kg

  গ

  5kg

  ঘ

  100kg
• Rockwell hardness test uses either a ____________ ball or ___________ cone for measuring hardness.
  ক

  steel, diamond

  খ

  diamond, steel

  গ

  carbon, iron

  ঘ

  iron, carbon
• To perform Brinell test on a soft material like bronze _____________ kg of load is applied on the specimen.
  ক

  3000

  খ

  500

  গ

  6600

  ঘ

  1200
• Which of the following is not a way to prepare the test material for the Brinell hardness test?
  ক

  Grinding

  খ

  Layering

  গ

  Filing

  ঘ

  Polishing
• In the Brinell testing method, the load should be pressed for a minimum of ____________
  ক

  1000 seconds

  খ

  60 seconds

  গ

  10 seconds

  ঘ

  3 seconds
• The Brinell testing method uses a steel ball of __________ diameter for testing purposes.
  ক

  26mm

  খ

  1mm

  গ

  10m

  ঘ

  10mm
• There is a necessity to find the hardness of a material without causing deformation in them.
  ক

  True

  খ

  False
• For ____________ materials, there is no correspondence between tensile strength and hardness.
  ক

  soft

  খ

  hard materials

  গ

  steel

  ঘ

  carbon
• It is impossible to find a relation between hardness and tensile strength.
  ক

  True

  খ

  False
• It is vital that surfaces that have to be tested to determine the hardness of the material must be free of _____
  ক

  ridges

  খ

  evenness

  গ

  smoothness

  ঘ

  thickness
• Which of the following is not a hardness testing method?
  ক

  Rockwell hardness

  খ

  Brinell hardness

  গ

  Set method hardness

  ঘ

  Shore scleroscope hardness