ONLINE MCQ EE-Electrical Heating 2

Q1. Heat is transferred simultaneously by condition, convection and radiation
 A.  inside boiler furnaces
 [Correct Answer]
 B.  during melting of ice
 [Wrong Answer]
 C.  through the surface of the insulted pipe carrying steam
 [Wrong Answer]
 D.  from refrigerator coils to freezer of a refrigerator
 [Wrong Answer]
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Q2. In a resistance furnace the atmosphere is ____
 A.  oxidising
 [Correct Answer]
 B.  deoxidising
 [Wrong Answer]
 C.  reducing
 [Wrong Answer]
 D.  neutral
 [Wrong Answer]
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Q3. For heating element high resistivity material is chosen to
 A.  reduce the length of heating ele­ment
 [Correct Answer]
 B.  increase the life of the heating ele­ment
 [Wrong Answer]
 C.  reduce the effect of oxidation
 [Wrong Answer]
 D.  produce large amount of heat
 [Wrong Answer]
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Q4. In arc furnace the function of choke is
 A.  to stabilize the arc
 [Correct Answer]
 B.  to improve power factor
 [Wrong Answer]
 C.  to reduce severity of the surge
 [Wrong Answer]
 D.  none of the above
 [Wrong Answer]
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Q5. Which of the following is an advantage of eddy current heating ?
 A.  The amount of heat generated can be controlled accurately
 [Wrong Answer]
 B.  Heat at very high rate can be generated
 [Wrong Answer]
 C.  The area of the surface over which heat is produced can be accurately controlled
 [Wrong Answer]
 D.  All of the above
 [Correct Answer]
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Q6. Which of the following heating methods has maximum power factor ?
 A.  Arc heating
 [Wrong Answer]
 B.  Dielectric heating
 [Wrong Answer]
 C.  Induction heating
 [Wrong Answer]
 D.  Resistance heating
 [Correct Answer]
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Q7. The
process of heat transfer during the re-entry of satellites and
missiles, at very high speeds, into earths atmos­phere is known as
 A.  ablation
 [Correct Answer]
 B.  radiation
 [Wrong Answer]
 C.  viscous dissipation
 [Wrong Answer]
 D.  irradiation
 [Wrong Answer]
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Q8. By which of the following methods the temperature inside a resistance fur­nace can be varied ?
 A.  By disconnecting some of the heat­ing elements
 [Wrong Answer]
 B.  By varying the operating voltage
 [Wrong Answer]
 C.  By varying the current through heating elements
 [Wrong Answer]
 D.  By any of the above method
 [Correct Answer]
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Q9. In resistance heating highest working temperature is obtained from heating elements made of ____
 A.  nickel copper
 [Wrong Answer]
 B.  nichrome
 [Wrong Answer]
 C.  silicon carbide
 [Correct Answer]
 D.  silver
 [Wrong Answer]
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Q10. Ajax Wyatt furnace is started when
 A.  it is filled below core level
 [Wrong Answer]
 B.  it is filled above core level
 [Correct Answer]
 C.  it is fully empty
 [Wrong Answer]
 D.  none of the above
 [Wrong Answer]
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ONLINE MCQ EE-Electrical Heating 3
FREE SSC JE ONLINE TEST SERIES 2017-NON TECHNICAL PART(COMMON TO ALL BRANCH)

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