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### Engineering

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

##### The resistance of a strip of copper of rectangular cross-section is 2 ohm. A metal of resistivity twice that of copper is coated on its upper surface to a thickness equal to that of copper strip.  The resistance of composite strip will be - ( DRDO Exam. 2013)
 1) 6 ohms 2) 4/3 ohms 3) 3/2 ohms 4) 3/4 ohms 5) None of these
Explanation : Copper and coated metal strips have resistance of 2 ohms and 4 ohms respectively.
These two strips are in parallel. Hence the resistance of the composite strip will be (2x4) / (2+4) = 4/3 ohms. View Answer
##### What is the current rating of MCB, when it is used for 165 litre refrigirators ?
 1) 2 amps 2) 4 amps 3) 1.5 amps 4) 7.5 amps 5) None of these View Answer
##### A  network consists of linear resistors and ideal voltage source. If the value of the resistors are doubled, then voltage across each resistor is -
 1) halved 2) doubled 3) increases four lines 4) not changed 5) None of these View Answer
##### Induction type instruments can be used is -
 1) DC circuit only 2) AC circuit only 3) Both AC and DC circuits 4) Niether AC nor DC circui 5) None of these View Answer
##### What is the power in the given circuit ? 1) 3.92 kW 2) 28.6 W 3) 2.80 W 4) 9.8 W 5) None of these View Answer
##### In the electrical network shown in the figure, the potential difference across 3 resistance will be : 1) 12 V 2) 2.4 V 3) 24 V 4) 36 V 5) None of these View Answer
##### In the circuit shown in figure the reading of ammeter A is - 1) 0.2 A 2) 0.4 A 3) 0.6 A 4) 0.8 A 5) None of these View Answer
##### The flow and timing of data to and from the microprocessor  is regulated by -------- .
 1) control pins 2) address pins 3) data pins 4) power pins 5) None of these View Answer View Answer View Answer