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Engineer’s Job Aid ProgramImportant MCQ Questions for Recruitment Test Taken by IBA under !aka "ni#ersity

$Co%%ected by Md& 'aruk (ossain 'aruk) Assistant Engineer) BPB*

1. Dielectric materials are(A) Insulatingmaterials.

(B) Semiconducting materials.

(C) Magneticmaterials.

(D) Ferroelectric materials.

2. The material with lowest resistivity is() Constantan. (B) Silver(C) Manganin. (D) !ichrome.

". #ddy current loss is $ro$ortional to the() Fre%uency. (B) Square of the frequency.(C) Cu&e o' the're%uency.

(D) s%uareroot o' the 're%uency.

. A resistor used in colour TV has the following colour bands: yellow,violet, orange and silver. Its nominal value is

(A) 4.7 KΩ ±10 % (B) 4.7 KΩ ±5 %

(C) 47 K ±10 % (D) 470 KΩ ±5 %

*. Which of the following is an active device$A* an electric bulb $B* a diode

$C* a BJT $* a transformer 

+. Static Ca$acitors are used 'or() ,ower im$rovement. (B) Current im$rovement.(C) -oltage im$rovement. (D) Power factor

improvement.. The in$ut o' an ac circuit having $.'. o' /.0 lagging is 2/

-. The $ower drawn &y the circuit is 3() 12. (B) 2/.(C) !. (D) 0

0. The theoretical ma4imum e5ciency o' a Bridge recti6ercircuit is() 0.27. (B) ".#$.(C) 027. (D) /.+7.

8. The e5ciency o' a trans'ormer is ma4imum when() 9t runs at hal' 'ull load. (B) 9t runs at 'ull load.(C) Its Cu loss equalsiron loss.

(D) 9t runs overload.

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 The ,ower 'actor at resonance in :;C circuit is

() ero reading= then it can &econcluded that() ,ower 'actor is unity (B) ,ower 'actor is >ero(C) Power factor is '.lagging

(D) ,ower 'actor is /.*leading

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3hich o' the 'ollowing $ower $lant has the ma4imume5ciency?() Thermal (B) @ydroelectric(C) uclear (D) Diesel

1 The si>e o' a conductor used in $ower ca&les de$ends on

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. the() A$erating voltage. (B) ,ower 'actor.(C) Current to *ecarrie+.

(D) Ty$e o' insulation used.

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9' a trans'ormer $rimary is energised 'rom a s%uare wavevoltage source= its out$ut voltage will &e(A) A square wave. (B) sine wave.(C) triangular wave. (D) $ulse wave.