8551. In a gas-liquid shell and tube heat exchanger, the_________________?
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A. Gases to be heated/cooled is normally routed through the shell side, because the corrosion

B. Presence of a non-condensable gas decreases the condensing film co-efficient

C. rosive in nature

D. Gases under high pressure are routed through the tube side, because high pressure gases are

E. All A, B. & C.

F. sed by the cooling water or steam condensate remain localised to the tubes

8552. In a fully mechanised composting plant, involves________________?
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A. Mechanized segregation

B. All of these

C. Mechanized receipt

D. Mechanized pulverising of refuse

8553. In a full bridge VSI, in order to avoid the short circuit across the DC bus and the undefined AC output voltage condition, the modulating technique should ensure that___________?
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A. None of these

B. Either A. or B.

C. Top switch of each leg is on at any instant

D. Bottom switch of each leg is on at any instant

8554. In a full bridge VSI, in order to avoid the short circuit across the DC bus and the undefined AC output voltage condition, the modulating technique should ensure that___________?
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A. Bottom switch of each leg is on at any instant

B. Top switch of each leg is on at any instant

C. None of these

D. Either A. or B.
8555. In a free market?
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A. government intervenes

B. government interferes

C. Prices adjust to reconcile scarcity and desires

D. government plan production

8556. In a fort there is enough food sufficient for 1200 men for 10 days. How long the food would have last for if there would have been 1000 men.
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A. 12

B. 15

C. 20

D. 10

8557. In a flyback converter, the inductor of the buck-boost converter has been replaced by a_____________?
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A. Flyback transformer

B. Flyback transistor

C. Flyback resistor

D. Flyback capacitor

8558. In a few cultures a women can have several husbands at one time This custom is called_________________?
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A. bigamy

B. polyandry

C. polygyny

D. monogamy

8559. In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is_____________?
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A. H/G

B. H/(1 + G)

C. G/(1 + H)

D. G/H

8560. In a dried skull, holes on the lingual aspects of the deciduous teeth are called_____________?
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A. Herversian canals

B. Canals of Hirchfeld and Zuckerland

C. Volkmann canals

D. Gubernacular canals
8561. In a dried skull, holes on the lingual aspects of the deciduous teeth are called_____________?
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A. Canals of Hirchfeld and Zuckerland

B. Herversian canals

C. Volkmann canals

D. Gubernacular canals
8562. In a distribution of 10, 20, 30, 40, 50, the x is 30, the sum of deviations from x will be:________?
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A. 30

B. 15

C. 60

D. Zero
8563. In a distillation column, with increase in the reflux ratio, the heat removed in the cooler ______________________?
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A. Decreases

B. Remains unaffected

C. Increases

D. And the heat required in reboiler decreases

8564. In a distillation column, the minimum residence time for liquid in the downspout is about ______________ seconds?
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A. 8

B. 180

C. 80

D. 1

8565. In a distillation column, minimum clearance to be maintained between the overflow weir and the last row of the bubble caps is ______________ cms?
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A. 20

B. 15

C. 7.5

D. 2.5

8566. In a diesel engine, the fuel is ignited by___________________?
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A. ignition

B. injected fuel

C. spark

D. heat resulting from compressing air that is supplied for combustion

E. combustion chamber

8567. In a deposit of normally consolidated clay_________________?
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A. effective stress and undrained strength increase with depth but water content decreases with depth

B. effective stress, water content and undrained strength decrease with depth

C. effective stress increases with depth but water content of soil and un-drained strength decrease with depth

D. effective stress and water content increase with depth but undrained strength decreases with depth

8568. In a D.C. shunt motor, speed is______________?
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A. independent of armature current

B. directly proportional to the armature current

C. inversely proportional to the armature current

D. proportional to the square of the current

8569. In a D.C. machine stray loss is the sum of_____________?
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A. shunt field copper loss and mechanical loss

B. total copper loss and mechanical loss

C. armature copper loss and iron loss

D. iron loss and mechanical loss
8570. In a D.C. generator:___________________?
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A. internal characteristic = magnetisation characteristic ohmic drop

B. magnetisation characteristic = external characteristic

C. external resistance = internal char-acteristic armature reaction

D. external characteristic = magnetisation characteristic ohmic drop armature reaction
8571. In a D.C. generator the ripples in the direct e.m.f. generated are reduced by_____________?
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A. using conductor of annealed copper

B. using equiliser rings

C. using carbon brushes of superior quality

D. using commutator with large number of segments

8572. In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when____________?
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A. r.p.m. is less than 300

B. number of poles is 2

C. number of poles is 4

D. r.p.m. is more than 300

8573. In a D.C. generator the critical resistance refers to the resistance of_____________?
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A. field

B. load

C. brushes

D. armature

8574. In a D.C. generator the critical resistance can be increased by_____________?
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A. increasing its field resistance

B. decreasing its speed

C. decreasing its field resistance

D. increasing its speed
8575. In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralised by all of the following except______________?
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A. dummy coils

B. interpoles

C. shifting of axis of brushes

D. compensating winding

8576. In a CSTR _______________ varies with time ?
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A. Reaction rate

B. Concentration

C. Both A. & B.

D. Neither A. nor B.
8577. In a counterfort retaining wall, the main reinforcement is provided on the_______________?
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A. e="color: #003f1a;">4. inclined face in back counterEort

B. correct answer is

C. e="color: #003f1a;">3. bottom face in back counterfort
D. e="color: #003f1a;">2. inclined face in front counterfort
E. ="color: #003f1a;">1. bottom face in front counterfort
8578. In a consecutive reaction system of the given figure bellow, when E1 is much greater than E2, the yield of B increases with the____________________?
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A. Decrease in initial concentration of A

B. Increase of temperature

C. Decrease of temperature

D. Increase in initial concentration of A

8579. In a confederacy________________?
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A. power is centralized in a national government

B. powers not claimed by individual states are reserved by the national government

C. there is no national government whatsoever

D. all political power ultimately belongs to the states
8580. In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to ____________________?
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A. intake temperature and pressure conditions

B. N.T.P. conditions

C. none of the above

D. 20C and 1 kg/cm2

E. 0C and 1 kg/cm2

8581. In a competitive market, which of the following is least, likely to be the source of a persistent discriminatory wage differential ?
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A. the government

B. All of these answers could be source of a persistent discriminatory wage differential

C. the customer

D. the employer
8582. In a college election, a candidate secured 62 % of the votes and is elected by a majority of 144 votes. The total number of votes polled is:________?
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A. 600

B. 925

C. 800

D. 1200

8583. In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will___________________?
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A. Either increase or decrease; depends on the coolant flow rate

B. Remain unchanged

C. Increase

D. Decrease

8584. In a Circle of Radius 5 cm if AB and AC are two equal chords of length 6cm each, then the length of chord BC is___________?
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A. 7/5 cm

B. 12/5 cm

C. None of these

D. 24/5 cm

8585. In a chemical reaction as shown in the bellow figure, it is observed that the (i) Rate of formation of P is doubled on doubling the concentration of X (ii) Rate of formation of P is quadrupled on doubling the concentration of Y (iii) Doubling the concentration of Z does not affect the rate of formation of P What is the order of the above chemical reaction ?
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A. Second order

B. Third order

C. First order

D. Zeroth order

8586. In a charged capacitor the energy resides in________________?
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A. magnetic hield

B. nuclear field

C. gravitational field

D. electric field
8587. In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?
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A. 30%

B. 100%

C. 70%

D. 250%

8588. In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency_____________?
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A. is 7 kHz

B. is 12 kHz

C. cannot be determined

D. is 10 kHz

8589. In a certain normal distribution having = 35 and variance = 16, then mode will be_______________?
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A. 16

B. 3.5

C. None of these

D. 4

8590. In a certain low-pass filter, fc = 3.5 kHz. Its pass-band is_______________?
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A. 3.5 kHz

B. 7 kHz

C. 0 Hz to 3.5 kHz

D. 0 Hz

8591. In a certain CS JFET amplifier, RD= 1kO , RS= 560 O , VDD=10V and gm= 4500 S. If the source resistor is completely bypassed, the voltage gain is ________________?
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A. 2.52

B. 45

C. 450

D. 4.5

8592. In a centrifugal pump casing, the flow of water leaving the_______________?
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A. centrifugal

B. radial

C. rectilinear

D. vortex

E. radial

8593. In a centrifugal pump casing, the flow of water leaving the impeller, is___________________?
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A. free vortex motion

B. none of the above

C. radial flow

D. forced vortex

E. rectilinear flow

8594. In a capacitor, the electric charge is stored in_________?
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A. metal plates

B. dielectric

C. none of the above

D. dielectric as well as metal plates

8595. In a capacitor start motor, the phase displacement between starting and running winding can be nearly__________?
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A. 60

B. 30

C. 10

D. 90
8596. In a capacitor start motor, the phase displacement between starting and running winding can be nearly__________?
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A. 60

B. 30

C. 10

D. 90
8597. In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to_______________?
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A. to improve torque

B. reduce fluctuations in torque

C. improve power factor

D. increase overload capacity

8598. In a capacitive circuit___________?
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A. a steady value of applied voltage causes discharge

B. an increase in applied voltage makes a capacitor charge

C. decrease in applied voltage makes a capacitor charge

D. none of the above

8599. In a cable the voltage stress is maximum at____________?
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A. sheath

B. insulator

C. core of the conductor

D. surface of the conductor

8600. In a cable immediately above metallic sheath ______ is provided
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A. earthing connection

B. none of the above

C. armouring

D. bedding

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Federal Public Service Commission(FPSC):

FPSC exam is an mcqs based exam conducted for posts in federal government sector, Police services, Foreign Services and administrive servies etc. It checks the ability and skills of candidates in specific area. the weightage of post related subject is heigher in it and every post there are compulsory subject's mcqs as well like pak-study,islamiyat,english but it weightage is round 30% while 60 to 70% mcqs will be field specific. Federal Public Service commission posts are announced on first sunday of a month. so you will need to check their website on every first sunday of the month. www.fpsc.gov.pk is the official website where you can also see syllabus for your specific post as well so you will clearly see which subjects are included in your test and then came here to study and practice all those subjects before going to take your real test. Qualification required for most of the FPSC posts are bachelor's degree passed in 2nd division or grade C.

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National Testing Service(NTS):

Its completely an mcqs based test, mostly there are 100 mcqs of total 100 marks paper. there are 4 to 5 options for each mcq and you have to pick the right option. There are two types of tests one is Nat (its of students taking admission in college/university) and the other on is GAT which is for postgrade admissions. NTS is the first mcqs based assesment organization that started in 2006. The chances of cheating in this test were very low because they give different type of question paper to each individual that sets closer to eachother in the test hall, But previously there were some leaks of this test on social media before paper time and that's why the paper got canceled due to this reason. Nowadays several other alternatives to NTS also exists like Pakistan testing service (pts), Educational testing service(ets) and Allied Testing Service(ats)

MPT (mcqs base preliminary test):

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