Engineering

ISBT Reasoning for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams

Q51.
If an open capacitor is checked with an ohmmeter, the needle will -
1) stay on zero 2) stay on infinity
3) move from zero to infinity 4) move from infinity to zero
5)None of these
Answer : stay on infinity
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Q52.
What is the circuit when a resistor and an output capacitor form a series circuit with a square wave applied ?
1) an integrator 2) a differentiator
3) a multiplier 4) a divider
5)None of these
Answer : an integrator
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Q53.
Which of the following is considered as a capacitor's rate of charge  ?
1) magnetic 2) a current block
3) linear 4) exponential
5)None of these
Answer : exponential
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Q54.
What is the total capacitance ?

          
1) 4 F 2) 12 F
3) 6 F 4) 8 F
5)None of these
Answer : 12 F
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Q55.
Which of the following is a feature of an SCR device ?
1) Three layers with four junctions 2) Three layers with two junctions
3) Four layers with three junctions 4) Two layers with three junctions
5)None of these
Answer : Four layers with three junctions
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Q56.
Which of the following  is used by a Zener diode  ?
1) Voltage Regulation 2) Rectification
3) Noise Suppression 4) Blocking A.C
5)None of these
Answer : Voltage Regulation
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Q57.
A power gain of 30dB is equivalent to which amplification factor ?
1) 0.001 2) 1/30
3) 30 4) 1000
5)None of these
Answer : 1000
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Q58.
A disadvantage of a half wave rectifier is the fact that - 
1) The output voltage is excessive compared to that of a full-wave rectifier 2) The output current is excessive compared to that of a full-wave rectifier.
3) The output waveform is harder to filter than is the case with a full wave rectifier 4) It requires several expensive diodes, whereas a full wave rectifier requires only a single diode
5)None of these
Answer : The output waveform is harder to filter than is the case with a full wave rectifier
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Q59.
In N-type semiconductor, the minority carriers are -
1) Electrons 2) Protons
3) Holes 4) Positrons
5)None of these
Answer : Holes
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Q60.
The VA rating of a transformer is an expression of - 
1) The maximum frequency at which it can function 2) The type of core material it has
3) The voltage step-up or step-down ratio 4) The impedance transfer ratio
5)None of the above
Answer : None of the above
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