‎For generating a 1 kilo Hertz note, the most suitable circuit is :‏ .ا5
‎(A) Hartly oscillator (18) Colpits oscillator‏
‎Tuned-collector oscillator (D) Wein bridge oscillator‏ )0(

‎52. When the motor is switched to star possision-through a star delta stater the stator current
will become :

‎(ക) /3 times the current taken in delta position

‎(B) the times the current taken in delta position

‎0 1/-/3 times the current taken in delta position

‎D) ദൃ times the current taken in delta position

‎58. Armouring is provided in the cables to safe guard against :
(4) moisture entry (B) mechanical injury
(C) white out attack (D) bursting on failure

‎54. The transducer used in a strain guage is :
(ಗ) an active transducer
(8) a device that converts electrical voltage in to mechanical displacement
(09 a device that converts mechanical displacement in to electrical current
(D) a device that converts mechanical displacement into a changing resistance

‎55. The material used for making the starting resistance of a starter is :
(A) Eureka (B) Tungstone
൫ Nichrome (D) Kanthal

‎56. Hystevisis loss of a single phase transformer is calculate by the formula is :

‎(A) RB“?max.f (B) QB’maxf
© PB“maxf 2) ம

‎57. The direction of rotation of an ordinary shaded pole motor :
(A) can be reversed by reversing the supply terminal-actions of the stator winding
(B) can not be reversed
(0) can be reversed by open circuiting the shading-rings
(D) can be reversed by short circuiting the shading rings

‎A 9 99/2015
[7.1.0.]

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