Electromagnetic Testing - ECT Q&A
Electromagnetic Testing - ECT Q&A
Electromagnetic Testing - ECT Q&A
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Q3. Doubling the number of turns on a coil will:<br />
a) double its inductance.<br />
b) halve its inductance.<br />
c) decrease its inductance by approximately a factor of four.<br />
d) increase its inductance by approximately a factor of four.<br />
Q4. What is a magnetically soft material<br />
a) A material capable of being magnetized permanently.<br />
b) A material with a high coercive force.<br />
c) A material with a low coercive force.<br />
d) A material with low hardness value.<br />
Q5. When a ferromagnetic metallic material is placed inside a test coil at low<br />
test frequencies, the flux density in the material is:<br />
a) less than the flux density generated by the test coil because of heat losses.<br />
b) less than the flux density generated by the test coil because of resistivity.<br />
c) the same as the flux density generated by the test coil in air.<br />
d) greater than the flux density generated by the test coil in air.<br />
Charlie Chong/ Fion Zhang
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