PSO TEST
Electrical
1. ____ is defined as the measure of instrument by which it is error free
A. Accuracy
B. Precision
C. Resolution
Ans: Precision
2. A _____ meter is used a null detector in wheatstone bridge
A. Ammeter
B. Voltmeter
C. Galvanometer
Answer: Galvanometer
3. A moving iron ammeter coil has few turns of thick wire in order to have:
A. Low resistance
B. High sentivity
C. Effective damping
D. Large scale
Answer: A
4. A permanent magnet coil meter has which features
A. Low power consumption
B. no hysteresis loss
C. reduced eddy current
D. reduced damping
E. all
Ans: E
5. The EM field and current are concentrated close to the surface of the conductor. The
phenomenon is called?
Ans: Skin Effect
6. The wavelength of an EM wave after reflection at an angle on a surface
Ans: Increases in the actual direction of propagation
7. When electric field is parallel to the plane of incidence, the electromagnetic wave is said to be
Ans: Parallel polarized
8. Δ x H = J + D is
Ans: Maxwell equation
9. Bucholz relay is used in
Ans: Transformer Protection
10. Solid grounding is used for voltages
a. above 220 kV
b. above 11 kV
c. below 660 V
d. below 115 V
Answer: C
11. Maximum Cross over distortion in
Answer: Class B
12. The channel of a JFET is between the
A. Gate and drain
B. Drain and source
C. Gate and source
D. Input and output
Answer: B
13. Velocity saturation in MOSFET is ?
14. Which type of engine uses maximum air fuel ratio
A. Petrol engine
B. Gas engine
C. Diesel engine
D. Gas turbine
E. Hydro turbine
Ans: Gas turbine
15. If ROC (Region of Convergence) does not converge
Ans?
16. In LTI system is characterized by
A. Impulse input
B. Step input
Ans: Impulse Response
17. Which thing happens in gas discharge lamps
Answer: Ionization in vapor or gas
18. Continuous signal in the time domain in frequency domain
Ans?
19. Which of the following relay is used in Motor for protection
Answer: Thermal relay
20. In z transform cos pi/4 is the period is equal to
Ans: N=8
21. Which system used dc to dc high voltage gain
A. Solar system
B. Battery backup
22. Power plant the availability of power is least for
A. Wind
B. Solar
C. Tidal
D. Geothermal
E. Bio gass
Ans: ?
23. A diode that has a negative resistance characteristics is the
A. Schottkey diode
B. Tunnel diode
C. Hot-carrier diode
D. Laser diode
E. Zener Diode
Answer: B
24. We built control systems for _______
1) remote control,
2) stability,
3) overcomingdisturbances,
$) All of above
Ans: All
25. Natural frequency of a system gives
1) nature of transient
2) overshoot
3) oscillations
4) speed of response
Ans: Oscillations
26. Hay bridge is used for the measurement of
Ans: Inductance
27. ____ bridge used for the measurement of resistance
Ans: Wheatstone bridge
28. _____ acts as voltage controlled variable capacitor
Ans: Varactor
29. By which a meter after checking with no current returns to its previous state
Ans: Controlling Torque
30. By connecting a shunt of higher value in ammeter what will decrease
Ans: Current sensitivity decreases
31. If z transform lies in ROC then
A. System is stable
B. Inverse of system is stable
C. Both system and its inverse are unstable
D. Both system and its inverse are stable
32. Under damped response have
1) damping ratio>1
2) 0>damping ratio<1
3)damping ratio =1
4)damping ratio =0
Ans
33. The rotor winding has resistance 85 ohms at temptature 22 degee,ifresistence increases to
100 ohms with temptature coefficient 0.004, what would be the temperature
1) 20 degrees
2) 50 degrees
3) 70 degrees
4)100 degrees
5) 120 degrees
Ans: 70 degree (not sure)
34. At Unity Power Factor, Armature Flux is??
1) Cross Magnetizing
2) Demagnetizing
3) zero
Ans: ?
35. If ROC does not lie inside unit circle, then
1) FFT converges
2) Z-Transfrom converges
Ans: ?
36. ROC converges if poles and zeros lies inside
1) origin
2) z=1
Ans: z=1 (not sure)
37. Fastest achievable Response without overshooting
1) under damped
2) overdamped
3) critically damped
Ans: critically damped
38. z transform is used when the system is not
Ans: Diverges (Not sure)
39. The main feature of crystal oscillator is
Ans: Stability
40.period of infinite continuous fourier series
.1).n
2)n+m
3) 2*pi/n
Ans?
Math’s (IQ) Portion
1. Waleed is 1/3 minus 5 of his father age. Waleed age is 7, What is his father age?
Ans: 36
2. Which one is odd? 12,15,18,20,24,27
Ans: 20
3. Name the eighth letter of alphabet from last?
Ans: S
4. What is letter of 3 alphabet before last vowel?
Ans: R
5. if 34+35=15 63+78=24 then 24+24=?
Ans: 12 (2+4+2+4)
6. 20-2=10, 30-6=10, 40-8=
Ans: 10
7. 6554=
Ans: FEED
8 .if A=2,B=3,C=4 and so on...
Ans: Major
9. A women pointing out a girl and said "She was the only daughter of my mother" Tell relation
of that girl with women?
Ans:
10. If FAIR is to FARE then HAIR is to?
Ans: HARE (Not Sure)
General Knowledge Portion
1. Where is attock oil refinery located??
Ans: Rawalpindi
2. Where was arsenic found??
Ans: Kohat (Not Sure)
3. Where and when oil was discovered???
Ans: 1759, USA(Not Sure)
4. The Coal & petroleum are found in what type rock?
Ans: Sedimentary Rocks
5. Which mineral is most found in Pakistan??
Ans: Coal
6. The chief source of water in Pak is?
Ans: River water
7. ……is a heavier residual fuel oil used in a Ship’s boiler?
Ans: Bunker fuel (Not sure)
8. …..is a renewable fuel synthesized from soyabean,other oil corps or animal tallow?
Ans: Biodiesel (Not sure)
9. …is a substance containing methane & Co2, produced fromanerobic decomposition of organic
material in a landfill?
Ans: BioGas
10. …… is a light petroleum distillate that is used inj space heaters,cook stoves & water heater &
is suitable for use as a light source where burned in wike-fed analysis?
Ans:
PSO Current Affairs
1. How many Divisions of PSO?
Ans: 14
2. Retail Outlets of PSO???
Ans: 3500 (3612)
3. PSO is supplying petroleum to IPP’s??
Ans: ?
4. PSO is supplying petroleum to
Ans: All of above
5. PSO started LPG business in which year
Ans: 1981 (http://www.psopk.com/products_servic...eous_fuels.php)
6. In Pakistan, who started first CNG supply
Ans: PSO (http://www.psopk.com/products_servic...eous_fuels.php)
7. PSO is supplying petroleum to …. Airports
Ans:
8. All divisional satation are linked by resource planing
Ans: SAP
9. & 10 Question related to Bulk Terminal
1:power system-------- is a word used in connection with AC current power system condition?
a)range b)loop c)gaind) stability .
Q 2:the terminal of an element is called ------? a)edge b)limit c) zero d)node(not sure) d)rim?
Q 3: transformer contains primary ,secondar and? core
Q 4:which analysis deals with the effect of disturbances on power system? a)fault trend analysis
b)sinusoidal analysis c)stability analysis d)line power analysis e)load flow analysis
Q 5:sinusoidal voltage and current at constant frequency is characterized by 2 parameters,a max
value and --------? Minimum value, phase
Q 6:reactive power can be generated at L load is determined by -----? a)field current cooling
limit b) Field Current Heating Limit d)peak load c)potential difference d)rate of variable output.
Q 7------interepting contacts of circuit breaker is a set of contancts which enable cicuit break to
be removed ? a)widrawal b)discontinue c)plug in d)current limiter (not sure) e)moulded case.
Q 8:what are examples of semi controlled switches ? Diode, thyristor
Q10:stability of LC tuned circuit depends on what ? Q factor
Q11 figuration of high impedance to low impedance depends on what criterion ? voltage
follower
Q12:which bridge is used to measure low resistance accurately? Kelvin bridge
voltage less than 10 volts is called----? a)dim b)Tame c)STray d)ground voltage.
Q 13:which theorem is used to analyse fault power?superposition
Originally Posted by Aized Amin
i am posting few question from today test:
1) Required air pressure in air blast circuit breaker?
2)lower voltages such as 66kv and 33kv is known as_____ voltages.
3) Nuclear unit rated 100MW require _____ tons urinium oxide.
4) Impedence through which negative sequence currrent flow in known as_____
5)in closed loop feed back strategy :
a) input dependent b) error driven c) none
6)In dc generator eddy current is________
7) Stability of dynamic system having no input is described with_______
8) baseband analog intensity modulation is done by modulating ______ applied to LED.
9)For input function of 2 boolean variables there are ______ boolean algebra functions.
10) Partial derivative of fxy and fyx are ______ derivatives.
11) y'+2y = 4( x + y )2 is _____ order equation.
12) Function is ______ if lies in open interval.
13) For multiple video channel digital modulation and ____ diode are necessary.
14) Intel MC-51 is referred as ______
Answers:
1) 20-30 kg/cm2
2) sub transmission voltages
3) 30-35 tons
4) negative sequence impedence
5) error driven
6)directly proportional to square of thickness
7) Layaponv stability
8) current
9) 16
10) mixed derivatives
11) 1st
12) diffrentiable
13) schottky
14) 8051
