Engineering

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

Q1.

1)	R1	2)	R2
3)	R3	4)	R4
5)	None of these

Q2.	if there are b branches and n nodes the number of equations will be

1)	n-1	2)	b
3)	b-n	4)	b-n+1
5)	None of these

Q3.	The minimum requirements for causing flow of current are

1)	a voltage source,a resistor, and a switch.	2)	a voltage source and a conductor
3)	a power source and a bulb	4)	a voltage source,a conductor,an ammeter and a switch
5)	None of these

Q4.	Due to the existence of  which of the following, the current flowing in an electrical circuit ?

1)	mmf	2)	emf
3)	Resistance	4)	Reluctance
5)	None of these

Q5.	In a linear system, an input of 5 sin wt produces an output of 10 cos wt. The output corresponding to input 10 cos wt will be equal to -

1)	+ 5 sin wt	2)	- 5 sin wt
3)	+ 20 sin wt	4)	– 20 sin wt.
5)	None of these

Q6.	For an SCR, di/dt protection is achieved through the use of  which of the following series ?

1)	R in series with SCR	2)	L in series with SCR
3)	RL in series with SCR	4)	RLC in series with SCR
5)	None of these

Q7.	The electric field lines and equipotential lines -

1)	Are parallel to each other	2)	Are one and the same
3)	Cut each other orthogonally	4)	Can be inclined to each other at any angle
5)	None of these

Q8.	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

Q9.	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

Q10.	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