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MCQs on Engineering Materials

May 4, 2017 by admin

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1. If the impurity content in metal alloy is increases, its president resistivity is
(a) decreases.
(b) increases.
(c) remain same.
(d) none of the above.  

Answer

           B 

2. Which of the following metal has lowest temperature coefficient of resistance?
(a) Copper.
(b) Aluminium.
(c) Gold.
(d) Kanthol.   

Answer

           C 

 3. The conductor have transport phenomenon of electrons due to
(a) electric field.
(b) magnetic field.
(c) electromagnetic field.
(d) Lorentz Force.  

Answer

           A 

 4. Which of the following is hard solder?
(a) Lead – tin.
(b) Lead – silver – tin.
(c) Lead – silver.
(d) Copper – zinc.   

Answer

           D 

 5. Piezoelectric material serve as a source of
(a) infrasonic waves.
(b) ultrasonic waves.
(c) x-rays.
(d) resonant waves.    

Answer

           B 

 6. Thermocouple are generally used for the measurement of
(a) core losses.
(b) temperature coefficient.
(c) temperature.
(d) coupling coefficient. 

Answer

           B 

 7. Which of the following material has the highest operating temperature?
(a) Eureka.
(b) Nichrome.
(c) manganin.
(d) kanthal.   

Answer

           D 

 8. The coil of a standard resistance are made by
(a) carbon.
(b) nichrome.
(c) tungsten.
(d) manganin.      

Answer

           D 

 9. The property of absorbing moisture from atmosphere is known as
(a) porosity.
(b) solubility.
(c) viscosity.
(d) hygroscopicity.    

Answer

           D 

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• Why all the voltage levels are multiples of 11 kV?
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 10. For which of the following material Hall coefficient found to be zero?
(a) metal.
(b) non-metal.
(c) insulator.
(d) none of the above.   

Answer

           A 

 11. Ferrimagnetic materials are generally used as
(a) permanent magnet.
(b) insulator.
(c) semiconductor.
(d) conductor.  

Answer

           C 

 12. Which of the following fluorescent material gives red colour fluorescence?
(a) Lead Carbonate.
(b) Calcium Silicate.
(c) Zinc Silicate.
(d) Magnesium Silicate.   

Answer

           D 

 13. Which of the following fluorescent material gives the green colour fluorescence?
(a) Zink Silicate.
(b) Calcium Silicate.
(c) Cerussite.
(d) Magnesium Silicate.    

Answer

           C 

 14. Which of the following material is mainly used to made permanent magnet?
(a) Ferromagnetic.
(b) Paramagnetic.
(c) Diamagnetic.
(d) soft iron.    

Answer

           A 

 15. Which of the following material is used for the insulator of overhead lines?
(a) Mica.
(b) Varnish.
(c) Porcelain.
(d) Teflon.  

Answer

           C 

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