D.C. machines designed with a large value of air gap length have_____ – McqOptions

MCQOPTIONS

1.	D.C. machines designed with a large value of air gap length have_____________?
A.	worst, ventilation
B.	poor ventilation
C.	better ventilation
D.	none of the above
Answer» D. none of the above

Discussion

No Comment Found

Related MCQs

<p> Dummy coil should not be used in_________________?</p>
<p> Which of the following methods is most accurate ?</p>
<p> electromagnets generally function as holding magnets ?</p>
<p> cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall______________?</p>
<p> In D.C. machines the width of the duct is usually_____________?</p>
<p> For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used?</p>
<p> The weight of copper of both armature and field windings decreases with __________ in number of poles?</p>
<p> The thermal conductivity of hydrogen is _____________ times that of air?</p>
<p> A practical formula for determining the thickness of insulation between low voltage and high voltage windings is__________________?</p>
<p> Which of the following materials is used in the manufacture of resistance grids to be used in the starters of large motors ?</p>