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E&E GATE Sample paper

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Printed Date: 26Feb2025 at 8:00am


Topic: E&E GATE Sample paper
Posted By: Arpita
Subject: E&E GATE Sample paper
Date Posted: 04Jan2007 at 5:57pm


1 For the scalar field u =
x2 
2
+
y2 
3
, magnitude of the gradient at the point (1,3) is
Options
A)
Ö 13/9
B)
Ö 9/2
C)
Ö 5
D)
9
2


Correct Answer C

2 A digital-to-analog converter with a full-scale output voltage of 3.5 V has a resolution close to 14m V. Its bit size is
Options
A) 4 B) 8
C) 16 D) 32


Correct Answer B

3

A single-phase half-controlled rectifier is driving a separately excited dc motor. The dc motor has a back emf constant of 0.5 V/rpm. The armature current is 5 A without any ripple. The armature resistance is 2W. The converter is working from a 280 V, single phase ac source with a firing angle of 80°. Under this operating condition, the speed of the motor will be
Options
A) 339 rpm B) 359 rpm
C) 366 rpm D) 386 rpm


Correct Answer C

4

In relation to the synchronous machines, which one of the following statements is false?
Options
A) In salient pole machines, the direct-axis synchronous reactance is greater than the quadrature-axis synchronous reactance B) The damper bars help the synchronous motor self start
C) Short circuit ratio is the ratio of the field current required to produce the rated voltage on open circuit to the rated armature current
 D) The V-curve of a synchronous motor represents the variation in the armature current with field excitation, at a given output power


Correct Answer C

5 The 8085 assembly language instruction that stores the content of H and L registers into the memory locations 2050H and 2051H, respectively, is
Options
A) SPHL 2050H  B) SPHL2051H
C) SHLD 2050H D) STAX 2050H


Correct Answer C

6 If
 E
 is the electric field intensity, Ñ(Ñ x
 E
 ) is equal to  
Options
A)
 E
 		 B) |
 E
 | 
C) null vector D) zero


Correct Answer D

7 For the function f(x) = x2 e-x, the maximum occurs when x is equal to  
Options
A) 2 B) 1
C) 0 D) -1


Correct Answer B

8

Two wattmeters, which are connected to measure the total power on a three -phase system supplying a balanced load, read 10.5 kW and - 2.5 kW, respectively. The total powere and the power factor, respectively, are
Options
A) 13.0 kW, 0.334  B) 13.0 kW, 0.684
C) 8.0 kW, 0.52  D) 8.0 kW, 0.334


Correct Answer D

9 The insulation strength of an EHV transmission line is mainly governed by
Options
A) load power factor  B) switching over-voltages
C) harmonics  D) corona


Correct Answer B

10 For the equation,
s3 - 4s2+ s + 6 = 0
the number of roots in the left half of s-plane will be
Options
A) zero B) one
C) two  D) three


Correct Answer C



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