This document contains questions about various topics including geography, science, electronics, and computers. It tests knowledge on topics such as the largest ocean (Pacific), longest river (Amazon), blood pH level (7.4), when the UN was established (October 1945), and the island capital of Iceland (Reykjavik). The questions cover subjects like transformers, semiconductors, logic gates, microprocessors, and computer programming.

1. THE OGDCL TEST ELECTRICAL AND ELECTRONICS 20th August 2017
1. Largest ocean
Pacific ocean
2. Largest desert
Sahara
3. Longest river
Amazon
4. Largest planet
Jupiter
5. Blood PH
7.4
6. UN established
Oct 1945
7. RGST stand for
Reformed general sales tax
8. Island capital
Reykjavik
9. Sun shine vertically on equator how much time
Twice
10. Pakistan shortest border length
China
11.Opposite of show
Conceal
12. Opposite of liberal
Narrow minded
SUBJECT QUESTIONS

2. 13.In DC motor which loss decreases with increase in load
a)friction and windage loss b)core c)brush contact loss d)None
Ans D
14: Transformer Oil should be free from
a)Odour b)Gasses c)Sulphur d)Moisture
Ans D
15: Green functions is useful for solving
a)ordinary differential equation b)partial differential equation c)first order ordinary differential
equation d) second order differential equation
Ans B
16.Main drawback of feedback system is:
a)Inaccuracy b)Inefficiency c)Insensitivity d)Instability
Ans D
17.PCM quantization noise depends on
a)Number of quantization levels b)Sampling rate c)Index number d)none
Ans A
18.single flip flop is constructed using
a)NAND b)AND c)OR d)NOR
Ans A
19: ___Cells make concentration layer of lens
a)Strong b)Fibrous c)Weak d)Optical
Ans B
20.Pole shoes of DC machine fastened to pole core by
a)welding b)soldering c)steal clamp d)counter sunk
Ans D
21:Brushes on commutator are shifted from GNP to
a)obtain highest generated voltage b)Avoid sparking c)to increase generated efficiency d)to produce
sparking

3. Ans B
22:In common base amplifier output voltage is taken from
a)collector b)Emitter c)Base d)both a&c
Ans A
23:V = 50v AC, f = 10kHZ, I = 7.96mA then Inductance = L = ?
a)1mH b)10mH c)100mH d)1H
Ans C
24.Current and voltage are out of phase the power is
a)0 b)minimum c)maximum d)square
Ans A
25:Form factor is ratio of
a)avg to rms b)peak to rms c)rms to avg
Ans C
26.An electrode b/w cathode and anode is called ____
a)Filament b)Grid c)both
Ans B
27.A transformer transform ____
A Current
B Voltage
C Power
D frequency
Ans c
28:A semiconductor device is connected to battery, upon changing the polarity of battery the
current reduced to zero, device is
A N- type semiconductor
B P- type semiconductor
C P-N junction
Ans c

4. 29.form same peak value, of which signal the RMS value is least
A Sinusoidal
B Trianglar
C Square
D Full-wave rectified
Ans B
30- Power in Ac circuit is given by?
Ans VI Cos(ᶲ).
31.An average power delivered to a pure capacitor? ?
A capacitive
B reactivate
C zero
Ans C
32.Form factor is max
A sine
B squire
C half wave rectifier
D full wave rectifier
Ans half wave rectifier
33.Which is not a professional computer job ??
A sys analyst
B user
C programmer
D data entry outsourcing
Ans D not confrm
34. Which coupling is used in Stonemen Transmission Bridge?
a) Resistive b) Capacitive c) Inductive

5. d) Combination of all
Ans b
35.The Q of tuned circuit refer to the property of
A sensitivity
B selectivity
C fidelity
D none
Ans selectivity
36.IBM/360 was
A)1950
B)2nd generation
C)3rd generation
D)1995
37.----device that produced a constant voltage across (V=E) no matter what current is drawn from it
A Ideal current source
B Ideal voltage source
C Real voltage source
D real current and voltage source
Ans Ideal voltage source
38.The ladder network used in a D/A converter is
A R-L ladder
B R-C ladder
C R-2R ladder
D R- 2C ladder
Ans R-2R ladder
39.If F (jw) is the Fourier transform of f (t), than
A £ f(-t)=F (jw)

6. B £ f(-t)=F *(jw)
C £ f(-t)=F (-jw)
D £ f(-t)=F *(- jw)
Ans £ f(-t)=F *(jw)
40. Inverse Fourier transformF(w)=(1/jw)π&(w)
A sinwt
B coswt
C u(t)
Ans u (t)
41.Descreate Field Effect transistor are classified on the basis of,
A resistive state
B conducting state,
C volatic state,
D control gate concentration
42.SCR goes into saturation when gate cathode is,
A reverse biased
B forward
C saturation
D none
Ans b
43. TRIAC is a
A bi-directional device
B uni-directional device
C tri-directional device
D 2 terminal
Ans Bidirectional device

7. 44.DC CHOPERS HAVE PER UNIT RIPPLE AT MAXIMUN DUTY CYCLE (α) =
A 0.1,
B 0,3,
C 0.5,
D 0.7
Ans 0.5
45.memory unit using only gat
A RAM
B ROM
C Core
D Disc
Ans ram
46.Number of digits in octal
A 16
B 18
C 8
D 4
Ans 8
47. Binary of decimel 10 is
A 0110
B 0111
C 1010
D 1110
Ans c
48. binary of 0.6875 .........
A 1.1011

8. B 0.01011
C 0.1011
Ans a
49.__________ controls the dc motor speed..
A FET
B NPNP transistor
C SCR
D none
Ans scr
50.Diode in farword biased act as a ______resistive Device
A high
B low
C
51. sum of all the voltages in a loop is equal to,zero single node pair ckt ______ is occurs all
elements is same
Ans Votage not confrm
52. One can provide two or more voice circuit on the same carrier by using?,
A SSB-SC,
B ISB
C SSB WITH PILOT CARRIER,
D DSB-SC
Ans ISB
55. 16 bit binary work provide approximately how many combination?
A 256 CODE COMBINATION,
B 2^n CODE COMBINATION
Ans 2^n not confrm
56. AC MOTOR USED TO SERVO APPLICATIONS IS
A SINGLE PHASE INDUCTION MOTOR

9. B TWO PHASE INDUSTION MOTOR
C THREE PHASE INDUCTION
Ans two phase induction motor
57. greatest possible amplifications is
A common emitter
B common base
C common collector
D none
Ans a
58. implementation of a program includes
A debugging
B compiling
C testing
59.The ......---- field last as long as the current flowing in the circuit
A) electric
B) magnetic
C electron
D both a&b
60.microprocessor at the most elemental level is made up of transmission and?
A transistor
B transistor and gate
Compiled by Bahadur Ali Laghari