SSc LE Pak navy

SSC Lateral entry PAK NAVY

Posted on by Engr. Hamid Ali

Following are some MCQs from the test of SSC Lateral entry Pak Navy, 3rd batch on 23 9 2020. You can practice and learn most important MCQs for electrical tests preparation from Here.

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SSC lateral entry Pak Navy Test MCQs

Following are some MCQs of the test. I appeared in the test and Alhamdo Lillah Cleared the test. I am sharing the questions I remember. Rest test was completely copy past.

Q.1 In a half – wave rectifier, the load current flows for

(a) Complete cycle of the input signal

(b) Less than half-cycle of the input signal,

(c) More than half-cycle but less than complete cycle of the

input signal.

(d) Only for the positive half-cycle of the input signal.

Q.2 The ripple factor of a bridge rectifier is

(a) 0.482

(b) 0.812

(c) l.ll

(d) l.2l

Q.3 A half-wave rectifier is equivalent to a

(a) a clamper circuit

(b) a clipper circuit

(c) a clamper circuit with negative bias

(d) a clamper circuit with positive bias

Q.4 Bridge rectifiers are preferred because

(a) they require small transformer

(b) they have less peak-inverse voltage

(c) they need small transformer and also have less peak-inverse voltage

(d) They have low ripple factor.

Q.5 The basic reason why a full-wave rectifier has a twice the efficiency of a half-wave rectifier is that

(a) it makes use of transformer

(b) its ripple factor is much less

(c) it utilizes both half-cycle of the input

(d) its output frequency is double the line frequency.

Q.6 If, by mistake, a.c source in a bridge rectifier, is connected across the d.c. terminals, it will burn out and hence short diodes.

(a) one

(b) two

(c) three

(d) four

Q.7 When a diode is reverse biased, it is equivalent to

(a) An OFF switch

(b) an ON switch

(c) A high resistance

(d) none of the above

Q.8 At room temperature of 25 °C, the barrier potential for silicon is 0.7 V. lts value at l25° C is

(a) 0.5V

(b) 0.3V

(c) 0.9V

(d) 0.7V

Q.9 Reverse saturation current in a silicon PN junction diode

nearly doubles for every

(a) 2° C rise in temperature

(b) 5° C rise in temperature

(c) 6° C rise in temperature

(d) l0° C rise in temperature

If you know the answers then please write answers with explanations if possible in the comment section below. Thanks in advance

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