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MCQOPTIONS
This section includes 2242 Mcqs, each offering curated multiple-choice questions to sharpen your Php knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
Calculate the electric field due to a surface charge of 20 units on a plate in air(in 1012 order) |
| A. | 2.19 |
| B. | 1.12 |
| C. | 9.21 |
| D. | 2.91 |
| Answer» C. 9.21 | |
| 502. |
Identify the advantage of using method of images. |
| A. | Easy approach |
| B. | Boundaries are replaced by charges |
| C. | Boundaries are replaced by images |
| D. | Calculation using Poisson and Laplace equation |
| Answer» B. Boundaries are replaced by charges | |
| 503. |
Which among the following is not a secondary adjustment? |
| A. | Accelerating pump |
| B. | Metering rod |
| C. | Floats |
| D. | Idle adjuster |
| Answer» E. | |
| 504. |
Which among the following is not an indication of a rich mixture? |
| A. | Loud murder explosion |
| B. | High fuel consumption |
| C. | Surging while idling |
| D. | Stalling of the engine |
| Answer» E. | |
| 505. |
What can we say about the air-fuel mixture if the engine is stalling by itself? |
| A. | The extra weak mixture is supplied |
| B. | An extra rich mixture is supplied |
| C. | Combustion in muffler |
| D. | The color of the exhaust smoke is black |
| Answer» B. An extra rich mixture is supplied | |
| 506. |
Which among the following should never be used in the cleaning of jets present in a carburetor? |
| A. | Petrol |
| B. | Blast of air |
| C. | Wire |
| D. | Carb cleaner |
| Answer» D. Carb cleaner | |
| 507. |
In which among the following does not depend on the carburetor to provide the correct mixture of air-fuel? |
| A. | Idling |
| B. | Crushing |
| C. | Accelerating |
| D. | Pressure relief |
| Answer» E. | |
| 508. |
How many numbers of jets are present in a simple carburetor? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 509. |
What is the number of rotation that has to be given to the idle screw to adjust the carburetor? |
| A. | 2 |
| B. | 2.5 |
| C. | 1 |
| D. | 3 |
| Answer» C. 1 | |
| 510. |
What is the first step in removing the carburetor? |
| A. | Remove the throttle and choke linkage |
| B. | Adjustment of the carburetor screw |
| C. | Wash with petrol |
| D. | Clean with the blast of air |
| Answer» B. Adjustment of the carburetor screw | |
| 511. |
What is the main reason for throttle adjustment? |
| A. | To know the play of the acceleration pedal |
| B. | To decrease the engine speed |
| C. | To check the float |
| D. | Both decrease the engine speed andcheck the float |
| Answer» B. To decrease the engine speed | |
| 512. |
Which among the following is not an indication of the extra weak mixture? |
| A. | Loss of power |
| B. | Overheating of engine |
| C. | Stalling of the engine |
| D. | Surging while idling |
| Answer» E. | |
| 513. |
What can we recognize if the color of the exhaust smoke is black? |
| A. | Overheating of the engine |
| B. | Loss of power |
| C. | Unburnt carbon particle |
| D. | Stalling of the engine |
| Answer» C. Unburnt carbon particle | |
| 514. |
Concerning the idle port area which among the following decreases by screwing the idle screw? |
| A. | Pressure |
| B. | Clearance |
| C. | Engine speed |
| D. | Air – fuel |
| Answer» D. Air – fuel | |
| 515. |
Using which among the following are the jets present in a carburetor should be cleaned? |
| A. | Water and antifreeze |
| B. | Diesel and petrol |
| C. | Petrol and blast of air |
| D. | Kerosene and wire |
| Answer» D. Kerosene and wire | |
| 516. |
What is the output of the following code shown? |
| A. | 1/1-a |
| B. | Inf |
| C. | Error due to Inf |
| D. | Error due to an unmentioned value of aView Answer |
| Answer» B. Inf | |
| 517. |
The result of cumsum([1,2,3]) and sum([3,3]) are ____________ |
| A. | Same |
| B. | Different |
| C. | Absolute numbers |
| D. | Signed numbers |
| Answer» C. Absolute numbers | |
| 518. |
The sum function will return a NaN if any of the element in the input vector is NaN. |
| A. | True |
| B. | False |
| Answer» C. | |
| 519. |
Which function does cumulative summation of elements? |
| A. | sumcum[] |
| B. | sumcum() |
| C. | cumsum[] |
| D. | cumsum() |
| Answer» E. | |
| 520. |
The function to find the R.M.S value is __________ |
| A. | sqrt(meansqr()) |
| B. | sqrt[meansqr[]] |
| C. | sqrt(meansqr[]) |
| D. | sqrt[meansqr()] |
| Answer» B. sqrt[meansqr[]] | |
| 521. |
The product of a set of elements is always greater than it’s the cumulative sum. |
| A. | True |
| B. | False |
| Answer» C. | |
| 522. |
In pressure velocity compounding, the total drop in steam pressure is divided into stages and velocity obtained in each stage is also compounded. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 523. |
Identify the incorrect statement about blades. |
| A. | Fixed profile type blade redirects the steam |
| B. | Steam pressure is dropped in moving as well as fixed aerofoil type blades |
| C. | Fixed aerofoil type blades act as nozzles |
| D. | Steam pressure us dropped in moving profile type blades |
| Answer» E. | |
| 524. |
In a condensing steam turbine the pressure of the steam leaving the turbine should be equal to _____ |
| A. | inlet pressure |
| B. | condenser pressure |
| C. | atmospheric pressure |
| D. | boiler pressure |
| Answer» C. atmospheric pressure | |
| 525. |
Which of the following turbines has the least efficiency? |
| A. | Curtis and Moore turbine |
| B. | Rateau and Zoelly turbine |
| C. | De laval turbine |
| D. | Curtis turbine |
| Answer» D. Curtis turbine | |
| 526. |
Identify the incorrect statement regarding impulse turbine. |
| A. | Blade manufacturing of reaction turbine is difficult than that of impulse turbine |
| B. | Impulse turbine makes use of profile type blades whereas reaction turbine uses aerofoil type |
| C. | Pressure drop occurs in only nozzles in impulse turbines but also occurs in moving blades reaction turbine |
| D. | Impulse turbine can generate more power than impulse turbine |
| Answer» E. | |
| 527. |
Pressure velocity compounding is used in _____ |
| A. | Rateau and Zoelly turbine |
| B. | Curtis and Moore turbine |
| C. | De laval turbine |
| D. | Curtis turbine |
| Answer» C. De laval turbine | |
| 528. |
Which of the following turbines do not resort to any method of rotor speed? |
| A. | De laval turbine |
| B. | Curtis turbine |
| C. | Rateau and Zoelly turbine |
| D. | Curtis and Moore turbine |
| Answer» B. Curtis turbine | |
| 529. |
Which of the following turbine uses pressure compounding method for reduction of rotor speed? |
| A. | Curtis turbine |
| B. | Rateau and Zoelly turbine |
| C. | Curtis and Moore turbine |
| D. | De laval turbine |
| Answer» C. Curtis and Moore turbine | |
| 530. |
Which of the following statements is FALSE about pressure compounding? |
| A. | Steam pressure is reduced when steam moves over the moving blade |
| B. | Multiple set of nozzles is used |
| C. | Rotor speed is not very high |
| D. | Steam expansion takes place in steps |
| Answer» B. Multiple set of nozzles is used | |
| 531. |
Which of the following statements is FALSE about velocity compounding? |
| A. | Steam is expanded through only one set of nozzles |
| B. | Low cost and high efficiency |
| C. | The kinetic energy of the steam is absorbed in stages |
| D. | The fixed blades re-direct the direction of velocity |
| Answer» C. The kinetic energy of the steam is absorbed in stages | |
| 532. |
Which of the following statements about multi-stage reaction turbine is FALSE? |
| A. | Pressure drop takes place gradually over the fixed blades |
| B. | Fixed blades act as nozzles |
| C. | Moving blades absorb kinetic energy of the steam |
| D. | Pressure is not altered while the steam is moving over the moving blades |
| Answer» E. | |
| 533. |
The wheel or rotor speed in case of De laval turbine is low as only one ring of moving blade absorbs the kinetic energy of the steam. |
| A. | True |
| B. | False |
| Answer» C. | |
| 534. |
Which of the following statements about De laval turbine is FALSE? |
| A. | It has only one set of nozzles |
| B. | Impulse blades are attached to the rotors |
| C. | It has multiple rings of moving blades |
| D. | Exit velocity of steam is very high |
| Answer» D. Exit velocity of steam is very high | |
| 535. |
In steam turbine terminology, the loss of energy due to higher exit velocity of steam is called _____ |
| A. | velocity loss |
| B. | energy loss |
| C. | kinetic loss |
| D. | carry over loss |
| Answer» E. | |
| 536. |
How many set of nozzles are there in a simple impulse turbine? |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» B. two | |
| 537. |
Which of the following voltage is a phase voltage in the delta connection? |
| A. | VRN |
| B. | VBR |
| C. | VYN |
| D. | VBN |
| Answer» C. VYN | |
| 538. |
The relation between line voltage and phase voltage in Delta or Mesh connection is? |
| A. | Vphase > Vline |
| B. | Vphase < Vline |
| C. | Vphase = Vline |
| D. | Vphase >= Vline |
| Answer» D. Vphase >= Vline | |
| 539. |
In the Delta or Mesh connection, there will be __________ number of common terminals. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 0 |
| Answer» E. | |
| 540. |
In the figure shown below, what will be the line voltage? |
| A. | VBR |
| B. | VBN |
| C. | VRN |
| D. | VYN |
| Answer» B. VBN | |
| 541. |
Figure below represents three phases of an alternator. The phase voltage for the star connection among the options given below is? |
| A. | VRY |
| B. | VRN |
| C. | VYB |
| D. | VBR |
| Answer» C. VYB | |
| 542. |
In wye or star connection _____________ of the three phases are joined together within the alternator. |
| A. | similar ends |
| B. | opposite ends |
| C. | one similar end, two opposite ends |
| D. | one opposite end, two opposite ends |
| Answer» B. opposite ends | |
| 543. |
In a three phase alternator, there are __________ independent phase windings or coils. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 544. |
In QAM, the amplitude is _______ and phase is _______ |
| A. | Varied, constant |
| B. | Varied, varied |
| C. | Constant, varied |
| D. | Constant, constant |
| Answer» C. Constant, varied | |
| 545. |
The power efficiency of the M ary PSK decreases because of the _____ |
| A. | Freely packed constellation |
| B. | Increment of bandwidth efficiency |
| C. | Fixed null bandwidth |
| D. | Densely packed constellation |
| Answer» E. | |
| 546. |
As the value of M _________ the bandwidth efficiency ________ |
| A. | Increases, same. |
| B. | Increases, decreases |
| C. | Increases, increases |
| D. | Decreases, same |
| Answer» D. Decreases, same | |
| 547. |
The constellation of M-ary PSK is ____________ dimensional. |
| A. | One |
| B. | Does not exist |
| C. | Two |
| D. | Three |
| Answer» D. Three | |
| 548. |
In M-ary PSK, the carrier ___________ takes one of M possible values. |
| A. | Amplitude |
| B. | Frequency |
| C. | Angle |
| D. | Phase |
| Answer» E. | |
| 549. |
The number of possible signal in M-ary signalling is given by M and M = __________ where n is an integer. |
| A. | n |
| B. | 2n |
| C. | 2n |
| D. | n2 |
| Answer» D. n2 | |
| 550. |
Fill in the blank :Aahna is ______ than Neha. |
| A. | more strong |
| B. | stronger |
| C. | most strong |
| D. | strongest |
| Answer» C. most strong | |