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
(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
(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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