Testing of Materials MCQ

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

• What is the wavelength of X-rays?
  ক

  10 picometers

  খ

  0.01 to 10 nanometers

  গ

  10 to 400 nanometers

  ঘ

  400 to 700 nanometers
• The amount of absorption of rays depends on the density and thickness of the material.
  ক

  True

  খ

  False
• Planar defects can’t be detected by radiography.
  ক

  True

  খ

  False
• ________ produce light area on film.
  ক

  Inclusions

  খ

  Pores

  গ

  Voids

  ঘ

  Blow holes
• The film in radiographic inspection is called __________
  ক

  Plate

  খ

  Radiograph

  গ

  Micrograph

  ঘ

  X-ray sheet
• The dark areas represent an object with ________
  ক

  Lower density

  খ

  High density

  গ

  Porosity

  ঘ

  Grain boundaries
• Radiographic inspection use _________
  ক

  Sound waves

  খ

  AC

  গ

  X-rays

  ঘ

  Visible light
• Ultrasonic testing is destructive testing?
  ক

  True

  খ

  False
• The object under ultrasonic inspection must have parallel surfaces.
  ক

  True

  খ

  False
• What is a type of piezoelectric crystal?
  ক

  Natural

  খ

  Normal

  গ

  Angle

  ঘ

  Transverse
• What is the drawback of ultrasonic testing?
  ক

  Low depth

  খ

  High sensitivity

  গ

  Shape restriction

  ঘ

  Higher errors
• Which of the following is the best transmitter of sound?
  ক

  Oil

  খ

  Aluminum

  গ

  Steel

  ঘ

  Copper
• Which of the following is the poorest transmitter of sound?
  ক

  Oil

  খ

  Water

  গ

  Air

  ঘ

  Copper
• What is acoustic impedance (in MPa s/m) of aluminum?
  ক

  1.58

  খ

  45.72

  গ

  16.77

  ঘ

  41.08
• Eddy current inspection is only used for ferromagnetic materials.
  ক

  True

  খ

  False
• The density of eddy current ____________ with distance from the surface in center.
  ক

  Increase linearly

  খ

  Increase exponentially

  গ

  Decrease linearly

  ঘ

  Decrease exponentially
• The total resistance of the coil in Eddy current inspection (ECI) is known as __________
  ক

  Impedance

  খ

  Inductance

  গ

  Reactance

  ঘ

  Capacitance
• What is the main reason for the limitation of depth below 6mm in Eddy current inspection (ECI)?
  ক

  Surface coating

  খ

  Electron hole pair generation

  গ

  Skin effect

  ঘ

  Residual stresses
• Eddy current inspection (ECI) is generally restricted to a depth below ___________
  ক

  1µm

  খ

  1mm

  গ

  2mm

  ঘ

  6mm
• What principle defines eddy current inspection (ECI)?
  ক

  Lenz law

  খ

  Biot-Savart Law

  গ

  Electromagnetic induction principle

  ঘ

  Faraday’s law
• Plain carbon steels are applied with magnetic particles by a residual method?
  ক

  True

  খ

  False
• Benzene and alcohol are used to decrease component.
  ক

  True

  খ

  False
• What is the advantage of using direct current in magnetic particle inspection?
  ক

  Battery maintenance

  খ

  Demagnetize easy

  গ

  Variable voltage supply

  ঘ

  Subsurface detection
• The minimum width of crack, which can be inspected by magnetic particle inspection is _________
  ক

  1nm

  খ

  1µm

  গ

  10µm

  ঘ

  1mm
• What is Curie point for most of the ferrous magnetic materials?
  ক

  550˚C

  খ

  760˚C

  গ

  910˚C

  ঘ

  1133˚C
• Which of the following material can’t be tested by magnetic particle testing?
  ক

  Co

  খ

  Fe

  গ

  Ni

  ঘ

  Mg
• Which of the following material can be tested by magnetic particle testing?
  ক

  Diamagnetic

  খ

  Non-magnetic

  গ

  Paramagnetic

  ঘ

  Ferromagnetic
• Small components are dipped in penetrant.
  ক

  True

  খ

  False
• Developer is chosen such as benzene.
  ক

  True

  খ

  False
• ___________ increases the visibility of the flaw in liquid penetrant inspection.
  ক

  Developer

  খ

  Penetrant

  গ

  Benzene

  ঘ

  Spirit