Assistant Director Air Traffic Control (ATC) CAA

Study Material

The following Drive folder contains study material, sample paper, aviation knowledge guidelines, and much more. Browse through it for help. You can comment below if you need any further guidance.

https://drive.google.com/open?id=12NkMf9Ls_gLpxs9tshitWhfcoR4yxm9y
SBP MCQs

You can download business communication MCQs for studying SBP from the following link:

https://drive.google.com/open?id=1cw4-cJ2j6d0toOhIuNcVcnXa4lArbZD0

2017 Paper:
https://drive.google.com/open?id=1koGAca9KJcgA-6l55KUnSgmUlCu-3Bhw

Sample Paper by CAA:
https://drive.google.com/open?id=1GcVG_b47pU9_orqoQIS88EBpFKnqNh4v

Browse through these papers and try to solve them.

FESCO Past Paper (solved)

his is a previous paper of FESCO for SDO/ Junior Engineer / AM Operations

1. Which is not the basic part of T/F? A) Corey B)Primary Winding C) Secondary winding D) Mutual Flux 

2. Fourier series representation of continuous signal require ___________ no: of harmonically complex exponents: a) N b) n+N c) 1 d) Infinite 

3. In 8085............is a part of control unit? A) ROM. B) Instruction registers. C) Ram. D) Op-code

4. Oscillator whose frequency can be changed by variable DC control voltage? a) Triangular wave oscillator, b) Wien bridge oscillator, c) Crystal oscillator, d) Voltage controlled oscillator 

5. The circuit produces output waveform without an external signal source? a) Filter, b) Amplifier c) Oscillator, d) None

6. Difference between JFET and MOSFET? PN junction 

7. The part which gives the instruction of Microprocessor, what to do is? a) RAM, b) RAM, c) Op code, d) On code

8. The parameter hfe corresponds to? a)Bdc its beta(dc), b)Bac (beta ac), c) r'e, d) r’c

9. Diode limiters are used to? a) Limit +ve portion, b) Limit -ve portion, c) Constant dc output d) Level to 0.7 e) Both A and B

10. FIR filters can be designed to achieve? A) linear phase B) Inverting phase

11. In 8085, the content of the instruction register is split into---------------nibble? a) 4, b) 2

12. State during which nothing has happened indicated by which instruction.....NOP (?)

13. FIR filters do not have.....feedback 

14. Due to velocity saturation region a) at pinch off b) before pinch off c) after pinch-off, etc.

15. Z transform is centered at.........? Origin

16. Optical power depends on a) quantum b) dark current, etc. or d) all?

17. Which source provides constant voltage a) ideal current source b) ideal voltage source c) both ideal current and voltage source, d) both real voltage and current source

18. JFET advantages? Small size, low noise, high power gain, etc. All 

19. JFET drawback......? low gain width product 

20. If emitter junction is forward biased, collector junction reversed biased, the amplifier is in a) active mode b) saturation, etc.

21. Which transformed used to convert signals from time to frequency domain? a) Laplace b) Fourier, etc.

22. ROC converges if poles and zeros lie inside? 1) origin, 2) Z=1

23. RLC at low frequencies has more Z because of? a) Xc is large, b) Xl is large, c) Xc is small d) Xl is small

24. In RLC complex system, analyzed by resistance, inductance and? Current, Inductance, Voltage, capacitance 

25. Sum of voltage drop in a loop is Zero

26. In BJT Vce is important because it can be used to check whether? a) working in saturation, b)working in cut off, c)defective, d) All

27. The dc operating point of an amplifier specified by voltage and current value? a) gain, b) q point, c) load line, d) none

TESCO Test 2019

Following is the TESCO test conducted by NTS on 21 Sept 2019 (Answers at the end):

General Knowledge Portion : 

Q.1)  What is the meaning of Iman-e-Mufassal?
A. The belief in detail
B. The belief in brief
C. The belief in all things
D. The belief in uncertain things

 Q.2) Zulfiqar Ali Bhutto was______ in Ayub cabinet
A. Foreign Minister
B. Defense Minister
C. Education minister

Q.3) I ________ my work yesterday
A.  Did
B.  Does
C.  Do

Q.4)  It's not true. I------ believe
A. Do not
B. Does
C. Did

Q.5) Sun ______ in my bedroom Windows every morning
A. Shine
B. Shines
C. Shone

Q.6) Parliment Or Majlis-e-Shoora of Pakistan
A. Parliment, senate, President
B. Parliment, senate, PM
C. Parliment, senate,PM and President
D. SENATE AND ASSEMBLY

Q.7) Joint chief of the selection committee is nominated by
A. President
B. PM
C. All officers of 3 army

Q.8) Reading Darood is Called
A. Salat
B. Unity
C. Faith

Q.9) Bangladesh Separated From Pakistan
A. 14 December 1971
B. 15 December 1971
C. 16 December 1971
D. 17 December 1971

Q.10)Initial budget of  CPEC is
A. 46 billion
B. 50 billion
C.  54 billion

Q.11) Who was the Second Governor General Of Pakistan as well as the second Prime Minister Of
Pakistan
A. Quaid e Azam Mohammad Ali Jinnah
B. Khuwaja Nazimudin
C. Liaqat Ali Khan
D. Ch.Mohammad Ali

Q.12) Jannat is a reward for
a. Good deeds
b. Hidden deeds
c. worse deeds
d. bad deeds

Q.13) By right-clicking on a theme applies it on which slides?
A) Current slide
B) first slide
C) last slide
D) all slides

Q.14) Style, font and color are present in
A) theme
B) heading
C) tools
D)

Q.15) How can you edit a chart
A) by dragging
B) by right click
C) by left click
D) by double click

Q.16) Which one is not a word layout
A) Print layout
B) Final layout
C) Web layout
D) draft

Technical Portion 

Q.17) Output of PV cell is

A. 60V
B. 0.6V 
C. 1V
D. None

Q.18) Due to the burning of 1Kg of pure carbon with a minimum quantity of air required, the
percentage of carbon dioxide in the exhaust gas would be
A. 10%
B. 19%
C. 29%
D. 39%

Q.19) In aircraft using a gas turbine, the cycle used is
A. Simple
B. Regeneration
C. Reheating
D. Reheating with regeneration

Q.20) Steam engine used in locomotives is
A. Single acting, condensing type
B. Single acting, non-condensing type
C. Double acting, condensing type
D. Double acting, non-condensing type

Q.21) A graphical representation between discharge m³/s and time is known as
A. Monograph
B. Water Discharge Graph
C. Topograph
D. Hydrograph

Q.22) A  Ash content of most of the Indian coals is around
A. 1%
B. 5%
C. 10%
D. 20% 

Q.23) A  Power plants using coal work closely on which of the following cycle?
A. Otto cycle
B. Binary vapor Cycle
C. Brayton cycle
D. Rankine cycle

Q.24) Atomic number of germanium
A. 48
B. 32
C. 34
D. 36

Q.25) Power transformer is usually designed to have maximum efficiency at
A. A little more than full load
B. Near full load
C. Half loaf
D. Quarter load

Q.26) The magnetizing current of a transformer is usually small because it has
A. Laminated silicon steel core
B. Small air gap
C. No rotating part
D. Large leakage flux

Q.27) Two Resistances 40 ohm and 60 Ohm given in Parallel. The Equivalent Resistance Will be
A. 24 Ohm
B. 25 Ohm
C. 26 Ohm
D. 27 Ohm

Q.28) Which instrument has the same calibration for AC and DC Values
A. Induction type
B. Hotwire type 
C. Moving coil type
D. Moving iron type

Q.29) The error ratio of the current transformer is due to
A. Exciting current
B. Stray magnetism
C. Corona effects
D. Lagging power factor


Q.30) Which of the following instruments does not use the effect of current for measurement purposes?
A. Electrostatic ammeter
B. Hotwire ammeter
C. Rectifier ammeter
D. Moving coil ammeter

Q.31) Which of the following is used for the insulation losses measurement
A. Shearing bridge
B. Hay bridge
C. Wein bridge
D. Kelvin bridge

Q.32) The deflecting torque in an instrument may be produced
A. Magnetically
B. Electrostatically
C. Thermally
D. All of the above

Q.33) Damping torque in an instrument is generally not produced
A. Pneumatically
B. Electromagnetically
C. Electrostatically
D. By fluid friction

Q.34) The function of a field regulator for compound motors is to
A. Control the flux
B. Limit the armature current
C. Demagnetize the field polarity
D. None of the above

Q.35) Retardation test in case of shunt motors and generators is used to determine
A. Friction losses
B. Eddy current losses
C. Copper losses
D. Stray losses

Q.36 ) Starting resistance in a dc motor is connected in
A. Series with the field winding
B. Parallel with the field winding
C. Parallel with the armature
D. Series with the armature

Q.37) D.P.D.T is a
A. Switch
B. Relay
C. Transistor
D. None

Q.38) The function of a starter in a dc machine is to
A. To limit the starting current
B. Avoid armature reaction
C. Control the speed
D. Avoid excessive Heating

Q.39)Which of the following parts help the commutation process?
A. Interpoles
B. Compensating windings
C. Poles shoes
D. All of these

Q.40) The Yoke in a Small dc machine is made of
A. Cast iron
B. Cast steel
C. Mild steel
D. Grain-oriented Steel

Q.41) Brushes for commutator for 220V dc generator are generally made of
A. Copper
B. Carbon copper
C. Electro graphite
D. Graphited copper

Q.42) Which of the following forms an energy converter?
A. Piezo-electric effect
B. Magneto-striction effect
C. Hall Effect
D. All of these

Q.43) A DC generator generates
A. DC voltage
B. AC voltage
C. DC and AC voltage
D. Pulsating DC

Q.44) A DC motor can be easily identified by
A. Winding
B. Commutator
C. Size of conductor
D. Yoke

Q.45) Sparking between contacts can be reduced by

a. Inserting Resistance in Line
b. Inserting Reactor in Line
c. inserting a capacitor in series with the contacts
d. Inserting a capacitor in parallel with the contacts

Q.46) Deuterium oxide is used in a nuclear reactor as
A. Fuel
B. Moderator
C. Shield
D. Regulator

Q.47) Which type of output voltage is formed in Full wave rectifier?
a. Pulsating DC
b. Pulsating AC
c. Pure DC
d. No ripple voltage

Q.48) In order to reduce skin effect at UHF
a. Conductors are painted
b. conductors are anodized
c. Copper tubes with silver plating are used
d. Copper rods with silver plating are used

Q.49) The surge impedance of Transmission Lines is about
a. 50 ohms
b. 100 ohms
c. 250 ohms
d. 500 ohms 

Q.50) Peak value of the power angle curve of a transmission line is 50MVA. If two such identical
lines are added in parallel the resulting peak value is _______
A. 100MVA
B. 25MVA
C. 50MVA
D. 200MVA

Q.51) A Coil is Supplied 220V and 2 Ampere Current 45 degree lagging, the Q of Coil is....??
A.100
B.1
C.25.
D.10

Q.52) S.I Unit of time is
a. Second
b. Hour
c. Minute
d. Week
e. Day

Q.52) If the n-type region is sandwiched in between two p-type  regions than the device formed is
a) n channel- MOSFET
b) p channel- MOSFET
c) n-p-n Transistor
d) p-n-p Transistor

Q.53) The actual size of the resistor determines its
a. Power rating
b. current rating
c. voltage rating
d. ohmic rating

Q.54) Torque in measurement of a device is due to
a. Deflecting Torque
b. Controlling torque
C. All

Q.55) In a nuclear power station moderator is used to
a. Absorb neutrons
b. Reduce the speed of neutrons
c. Accelerate the speed of neutrons
d. Stop the chain reaction


Q.56) Convert 470 μ V is equal to how many mV?
a. 0.47mV
b. 0.047 mV
c. 4.7mV
d. None

Q.57) Which of the following is a Perfect insulator?
A. Porcelain
B. Steel
C. Ebonite
D. Copper

Q.58) Three amplifiers are cascaded, each has a gain of 30 , Then total Gain is?
A. 30
b. 90
c. 2700
d. 27000

Q.59) Which of the following is generally not a constituent of Coal?
A) Sulpher
B) Hydrogen
C) Chromium
D) Moisture

Q.60)Parallel resonance circuit magnifies
a. Current
b. Voltage
c. power
d. All

Q.61) Steam engine used in the locomotive is
(A) Single-acting condensing type
(B) Double-acting condensing type
(C) Double-acting non - condensing type
(D) Single-acting noncondensing type.

Q.62) In the ideal diesel cycle the working substance is
(A) Air
(B) Diesel
(C) Mixture of air and diesel
(D) Any combustible gas.

Q.63) Coking is
(A) formation of lumps or masses of coke in boiler furnaces at high temperatures
(B) heating of coal in absence of air, driving out CO2 and leaving behind the residue and carbon
(C) burning of coal in a furnace
(D) producing lumps of coal from fine powders with the help of a binder.

Q.64) The voltage of a single solar cell is
(A) 0.5 V
(B) 1 V
(C) 1.1 V
(D) 5 W.

Q.65) The output of a solar cell is of the order of
(A) 0.1 W
(B) 0.5 W
(C) 1 W
(D) 5 W.

Q.66) Conductance and susceptance both parts of admittance are connected in
______________a circuit
A-Series
B-Series parallel
C-Parallel
D- Insufficient Information

Q.67)Reciprocal of Network function is
A. Never transfer function
B. Never immittance function
C. Immittance function if the original function is omittance
D. Transfer function if the original function is the transfer function

Q.68)The direction of rotation of Compound DC motor can be effectively reversed by interchanging
a. Shunt Field Connections
b. Series Field Connections
c. Armature Connections
d. Line Leads

Q.69)In a Compound DC motor, the shunt field winding as compared to series field winding will
have
A. More turns and smaller cross-section of wire
B. Less turns and large cross-section of wire
C. More turns and large cross-section of wire
D. Less turns and smaller cross-section of wire

Q.70) Electric field lines emerge from any Charge outside in
a. One dimension
b. Two-dimension
c. Three dimension
d. four dimension

Q.71) In a compound motor if series field windings are removed then motor will
a. It will not start
b. It will experience vibration and noise
c. It will start with jerk

Q.72)When the transistor is switched off, then the current in which of the following becomes Zero
?
a. Collector
b. Emitter
c. Base
d. All

Q.73)An Electron is moving parallel to a Magnetic Field. Then the force experienced by it is,
 a. Zero
b. evB
c. – evB
d. 1

Q.74) In a permanent magnet DC motor, which of the following method of Speed control cannot be used ?
a. Armature voltage Variation
b. Field Voltage control
c. Field current variation
d. Armature current variation

Q.75)The speed of DC shunt motor supplying a load at its rated speed, its speed can be
reduced by :
a. Increasing the applied voltage
b. Connecting an additional resistance in the armature circuit
c. Connecting an additional resistance in the field circuit
d. Decreasing the applied voltage

Q.76) D.C Potentiometer is an instrument to measure:
a. Unknown E.M.F
b. Large voltages
c. Large Power
d. Direct resistance

Q.77) If the lower value of 5% resistor is 209. Then what will be the Nominal Value of the resistor?
a. 210
b.215
c. 220
d. 225
e. 230

Q.78) A 120RJ resistor has a value of
a. 1.2  + 1%
b. 12   + 10%
c. 120 + 5%
d. 1200 + 2%

Credits for compilation with thanks: Engr Um’E Habiba.

Following are the answers: (errors and omissions are accepted) (? indicated doubt in the answer)
1A
2A
3A
4A
5B
6D
7A
8B
9C
10A
11B
12A
13D
14A
15D
16B
17B
18C
19A
20D
21D
22D
23D
24B
25B
26B
27A
28B
29A
30A
31A
32D
33C
34A
35D
36D
37A
38A
39A
40A
41C
42d?
43B
44B
45D
46B
47A
48C
49400ohm
50A
51B
52A
52C
53A
54C
55B
56A
57A
58D
59C
60A
61C
62A
63B
64A
65C
66C
67D?
68C
69A
70C
71A
72C?
73A
74B
75B
76A
77C
78C