Top 150+ Solved Magnetic Particle Testing Level 1 MCQ Questions Answer
Q. A minimum of external poles are produced by what type of magnetisation?
a. Continuous
b. Residual
c. Circular
d. Longitudinal
Q. A split coil would most likely be used with a:
a. DC yoke
b. Split phase AC yoke
c. Stationary magnetic particle unit
d. Portable magnetic particle unit
Q. The most common harmful effect of exposure to black light is:
a. Eyeball fluorescence
b. Burned retinas
c. Skin burns
d. None of the above
Q. Which of the following types of magnetic fields may be present without any externalevidence?
a. Circular
b. Longitudinal
c. Secondary
d. Tertiary
Q. The primary reason for using water rather than oil as a suspension medium for wetmethod baths is that
a. Water is more chemically inert than oil
b. Bath flammability hazards are eliminated
c. Water has the capability to dissolve the needed rust inhibitors
d. Water baths may be used at a lower temperature than oil baths
Q. Wet magnetic particle strength is checked by which of the following?
a. Specific gravity
b. Optical density
c. Settling test
d. None of the above
Q. A residual circular field may be objectionable because:
a. Grinding may produce heat cracks
b. Machining may create external poles
c. Heat treating may lead to tight surface cracks\
d. All of the above
Q. A prod method would be most sensitive to cracks:
a. Parallel to a line connecting the prod contract points
b. Tangential to a radius from each prod contact point
c. Perpendicular to a line connecting the prod contact points
d. Perpendicular to the long axis
Q. Maximum practical prod spacing for a 2000 amp unit is about:
a. 100 mm
b. 200 mm
c. 300 mm
d. 450 mm
Q. Demagnetisation with reversing DC is more effective than AC because:
a. DC is more penetrating
b. Demagnetisation is assisted by the skin effect
c. DC is more direct
d. Not true-AC is more effective
Q. Fluorescent magnetic particle indications should be inspected under
a. Fluorescent light
b. Any light
c. Black light
d. Red light
Q. Cracks which are caused by a combination of tensile stress and corrosion are called:
a. Intergranular stress corrosion cracking
b. Cycling cracks
c. Stress corrosion cracking
d. Fatigue cracks
Q. The type of discontinuity potentially most harmful to the useful life of a part is:
a. Slag inclusions
b. Magnetic writing
c. Porosity
d. Surface cracks
Q. Magnetic particle test indications which are due to cold work can best be removed by:
a. Demagnetisation
b. Using a lower current
c. Using penetrant testing
d. Re-heat treating
Q. Which of the following might cause non relevant indications?
a. Magnetic writing
b. Indications at the edges of a braze joint
c. A joint between hard and soft steels
d. All of the above