MCQs of Design of Three Phase Induction Motor (Design of AC Machines - 2170909)

Design of AC Machines (2170909) MCQs

MCQs of Design of Three Phase Induction Motor

Showing 91 to 97 out of 97 Questions

91.

In the design of a wound rotor three-phase induction motor. Total permeance for leakage flux path is given by

(a)	𝝀=𝝀_𝟏-𝝀_𝟐
(b)	𝝀=𝝀_𝟏+𝝀_𝟐
(c)	𝝀=𝝀_𝟏*𝝀_𝟐
(d)	𝝀=𝝀_𝟏/𝝀_𝟐

92.

𝜆1=___________ permeance of leakage flux path

(a)	Embedded winding′s
(b)	Overhang winding′s
(c)	Embedded winding′s + Overhang winding′s
(d)	None of these

93.

In the design of a three-phase induction motor. Embedded winding's permeance of leakage flux path is ________ to the length of the conductor section and __________ to pole pitch

(a)	inversely proportional, directly proportional
(b)	directly proportional, directly proportional
(c)	inversely proportional, inversely proportional
(d)	directly proportional, inversely proportional

94.

In the design of a three-phase induction motor. Overhang winding's permeance of leakage flux path is __________ to pole pitch

(a)	inversely proportional
(b)	directly proportional
(c)	Equal
(d)	half

95.

Which of the following is the equation used for the best power factor design of a three-phase induction motor?

(a)	$𝝉 = \sqrt{𝟎 . 81 𝑳}$
(b)	$𝝉 = 𝟎 . 𝟏 𝟖 𝑳$
(c)	$D = \sqrt{𝟎 . 𝟏 𝟖 𝑳}$
(d)	$𝝉 = \sqrt{𝟎 . 𝟏 𝟖 𝑳}$

96.

Which of the following is true for a two-pole three-phase induction motor design? Take Pi=3.14

(a)	$𝑫 = 0.27 \sqrt{𝑳}$
(b)	$𝑫 = \sqrt{𝟎 . 𝟏 𝟖 𝑳}$
(c)	$𝑫 = 0.1 \sqrt{𝑳}$
(d)	$𝑫 = \sqrt{𝑳}$

97.

For Best Power Factor design of three-phase induction motor – Leakage reactance must be ___________.

(a)	minimum
(b)	maximum
(c)	$\sqrt{0.18 L}$
(d)	$\sqrt{0.18 D}$

Showing 91 to 97 out of 97 Questions