MCQOPTIONS
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MCQOPTIONS
This section includes 1967 Mcqs, each offering curated multiple-choice questions to sharpen your Csharp knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
Following plot shows the concentration profile at two different time, T1 and T2 for the same non-steady diffusion process.What is the correct relationship between the two? |
| A. | T1 > T2 |
| B. | T2 > T1 |
| C. | Insufficient data |
| D. | Same process can’t have two concentration profiles |
| Answer» C. Insufficient data | |
| 452. |
Predeposition and drive-in diffusion are two heat treatments used in the manufacture of integrated circuits.Assertion: Predepostion is carried at a higher temperature than drive-in diffusion. |
| A. | True |
| B. | False |
| Answer» C. | |
| 453. |
If C is the concentration of the diffusing species at distance x from the source and time t, then according to Fick’s second law (assuming diffusion coefficient, D is constant): |
| A. | ∂C/∂x = D.(∂C/∂t) |
| B. | ∂C/∂t = D.(∂2C/∂x2) |
| C. | ∂C/∂x = D.(∂2C/∂t2) |
| D. | ∂C/∂t = D.(∂C/∂x) |
| Answer» C. ∂C/∂x = D.(∂2C/∂t2) | |
| 454. |
Concentration of hydrogen gas across a 2mm thick palladium sheet differs by 4 kg/m3. Considering steady-state diffusion with diffusion constant 10-10 m2/s, diffusion flux is ______ kg/m2.s: |
| A. | 2 x 1010 |
| B. | 2 x 10-10 |
| C. | 5 x 10-11 |
| D. | 5 x 109 |
| Answer» C. 5 x 10-11 | |
| 455. |
In steady state diffusion, which of the following remain unchanged with time? |
| A. | Concentration at source |
| B. | Concentration at sink |
| C. | Concentration profile |
| D. | All of mentioned |
| Answer» E. | |
| 456. |
Which of the following is used as a catalyst in the formation of polyvinyl butyral? |
| A. | Na2SO4 |
| B. | H2SO4 |
| C. | CrO3 |
| D. | (CH3COO)2Cd |
| Answer» C. CrO3 | |
| 457. |
What happens when the degree of alcoholysis of polyvinyl alcohol is increased beyond 90%? |
| A. | water solubility increases |
| B. | water solubility decreases |
| C. | decolouration occurs |
| D. | water insolubility |
| Answer» B. water solubility decreases | |
| 458. |
Which is the most widely used polymerization technique to produce polyvinyl actate? |
| A. | bulk polymerization |
| B. | solution polymerization |
| C. | emulsion polymerization |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 459. |
For a simply supported beam, where would absolute maximum moment occur? |
| A. | At midpoint |
| B. | Depends upon position of load applied |
| C. | Just next to one of ends |
| D. | At both of the ends |
| Answer» C. Just next to one of ends | |
| 460. |
For a cantilevered beam, where would absolute maximum moment occur? |
| A. | At midpoint |
| B. | Depends upon position of load applied |
| C. | Just next to free end |
| D. | Just next to fixed support |
| Answer» E. | |
| 461. |
For a simply supported beam, where would absolute maximum shear occur? |
| A. | At midpoint |
| B. | Depends upon position of load applied |
| C. | Just next to one of ends |
| D. | At both of the ends |
| Answer» D. At both of the ends | |
| 462. |
Generally, which parts’ ILD is given the most preference? |
| A. | Floor beams |
| B. | Side girders |
| C. | Supporting columns |
| D. | Nowhere |
| Answer» C. Supporting columns | |
| 463. |
Supporting columns are last element of load transfer in a floor girder system.State whether the above system is true or false. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 464. |
Floor loads are transmitted from slabs to which part in a floor girder system? |
| A. | Floor beams |
| B. | Side girders |
| C. | Supporting columns |
| D. | Nowhere |
| Answer» B. Side girders | |
| 465. |
If an emf at slip frequency is injected at an angle α with existing rotor induced emf, then the ___________ |
| A. | power factor only improves |
| B. | speed changes |
| C. | power factor improves and speed changes |
| D. | power factor worsens and speed changes |
| Answer» B. speed changes | |
| 466. |
A constant torque variable power drive of induction machine has ___________ |
| A. | constant air gap flux. |
| B. | constant slip |
| C. | variable air gap flux, constant slip |
| D. | constant slip, constant air gap flux |
| Answer» E. | |
| 467. |
If a 3-phase induction motor is fed from the rotor short circuiting the stator terminals, frequency of the current flowing in the short-circuited stator is? |
| A. | slip frequency |
| B. | supply frequency |
| C. | zero |
| D. | frequency corresponding to the rotor speed |
| Answer» B. supply frequency | |
| 468. |
Torque-slip characteristic of an induction motor is linear in the smaller slip values, because ___________ |
| A. | effective rotor resistance is very large compared to reactance |
| B. | rotor resistance is equal to stator resistance |
| C. | rotor resistance is equal to rotor reactance |
| D. | rotor reactance almost equal to stator reactance |
| Answer» B. rotor resistance is equal to stator resistance | |
| 469. |
As a 3-phase induction motor, as load increases from no load towards the full load. |
| A. | A, B |
| B. | B, C |
| C. | A, B, C |
| D. | A, CView Answer |
| Answer» B. B, C | |
| 470. |
For 3-phase induction motor, as load increases from no load towards the full load then the ___________ |
| A. | power factor improves |
| B. | power factor remains same |
| C. | power factor varies linearly |
| D. | power factor increases till 40% load and then decreases |
| Answer» B. power factor remains same | |
| 471. |
Due to the line to ground fault, phase ‘a’ in the induction motor phase supply gets cut, then machine ___________ |
| A. | continues to run with excessive supply current |
| B. | continues to run with reduced slip |
| C. | stalls |
| D. | all of the mentioned |
| Answer» B. continues to run with reduced slip | |
| 472. |
If one of the supply fuses blows off and gets open circuited, then for the connected induction machine continues to run with increased slip. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 473. |
Choose from the below which can be obtained by the equivalent circuit of an electrical machine? |
| A. | Complete performance characteristics of the machine |
| B. | Temperature coefficients of the machine components |
| C. | Type of protection to be used in the machine |
| D. | Design parameters of the windings |
| Answer» B. Temperature coefficients of the machine components | |
| 474. |
A center ammeter connected to the rotor end circuit of a 6-pole,50 Hz, induction motor makes 45 complete oscillations in a minute. Then the rotor speed and the speed of stator field w.r.t. rotor is? |
| A. | 985, 15 |
| B. | 970, 1000 |
| C. | 985, 985 |
| D. | 985, 970 |
| Answer» B. 970, 1000 | |
| 475. |
A 3-phase slip ring IM is has its copper bars changed by the aluminium bars in the machine. With the above change ___________ |
| A. | starting torque remains same |
| B. | starting torque increase |
| C. | starting torque decrease |
| D. | maximum torque increase |
| Answer» B. starting torque increase | |
| 476. |
A 3-phase slip ring IM is has its copper bars replaced by the aluminium bars in the machine. With the above change ___________ |
| A. | starting torque increases, maximum torque remains same, smT increase |
| B. | starting torque increases, maximum torque remains same, smT remains same |
| C. | starting torque increases, maximum torque remains increases, smT increase |
| D. | starting torque decreases, maximum torque remains same, smT decrease |
| Answer» B. starting torque increases, maximum torque remains same, smT remains same | |
| 477. |
For a 3-phase 4-pole induction motor has open circuited slip rings. The frequency across the slip rings is 75 Hz. Then we can conclude that the motor is run at a speed of __________ |
| A. | (i), (iv) |
| B. | (i), (iii) |
| C. | (ii), (iii) |
| D. | (ii), (iv)View Answer |
| Answer» B. (i), (iii) | |
| 478. |
The stator of a 3-phase, six pole induction motor’s stator is connected to 50 Hz supply while its rotor is fed from a 20 Hz supply. The possible speeds at which the machine will run will be? |
| A. | (ii), (iii) |
| B. | (ii), (iv) |
| C. | (i), (iii) |
| D. | (i), (iv)View Answer |
| Answer» B. (ii), (iv) | |
| 479. |
Which of the following is correct? |
| A. | I, II |
| B. | II |
| C. | I |
| D. | None of the mentionedView Answer |
| Answer» B. II | |
| 480. |
A 3-phase induction motor is fed at the stator at a frequency f. If the rotor speed is Nr and synchronous speed is Ns, then the absolute speed of the resultant flux in space is? |
| A. | Ns |
| B. | (Ns+Nr) if the flux rotates in the same same direction as the rotor |
| C. | (Ns-Nr) if the flux rotates in the same same direction as the rotor |
| D. | Nr |
| Answer» B. (Ns+Nr) if the flux rotates in the same same direction as the rotor | |
| 481. |
Typical lane widths range from ______ metres to _____ metres. |
| A. | 1, 2.4 |
| B. | 10, 12.6 |
| C. | 3, 3.6 |
| D. | 8, 8.6 |
| Answer» D. 8, 8.6 | |
| 482. |
____________________ is the road alignment specification which provides a substantially clear line of sight so that the driver of a vehicle. |
| A. | Stopping sight distance |
| B. | Safe sight distance |
| C. | Corner sight distance (CSD) |
| D. | Intersection sight distance |
| Answer» D. Intersection sight distance | |
| 483. |
The vertical alignment of a road, expressed as a series of grades, connected by parabolic curves is called ___________ |
| A. | curb |
| B. | cant |
| C. | profile |
| D. | curve |
| Answer» D. curve | |
| 484. |
A ________ is a thoroughfare, route, or way on land between two places that has been paved or otherwise improved to allow travel by foot or some form of conveyance, including a motor vehicle, cart, bicycle, or horse. |
| A. | harbour |
| B. | hole |
| C. | lift |
| D. | road |
| Answer» E. | |
| 485. |
Normally earthwork is estimated for 30 m lead for distance and 1.5 m lift for height or depth, and this distance of 30 m and the height of 1.5 m are known as _____________ |
| A. | vertical lead and lift |
| B. | normal lead and lift |
| C. | horizontal lead and lift |
| D. | transverse lead and lift |
| Answer» C. horizontal lead and lift | |
| 486. |
Parallel conductors form a distributed inductance with the insulation. |
| A. | True |
| B. | False |
| Answer» C. | |
| 487. |
Two parallel lines appear as a complex impedance when the transmission line is equal to the wavelength of the signal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 488. |
Which is the best type of coaxial cable connector in terms of performance? |
| A. | PL-259 |
| B. | N-type connector |
| C. | SMA |
| D. | BNC |
| Answer» C. SMA | |
| 489. |
Calculate the physical length of the transmission line for an operating frequency of 450MHz and 3⁄8λ long. |
| A. | 0.45 |
| B. | 0.84 |
| C. | 0.82 |
| D. | 0.41 |
| Answer» D. 0.41 | |
| 490. |
A current carrying conductor is only called a transmission line if the length of the line is _____ long at the signal frequency? |
| A. | 0.1λ |
| B. | 0.3λ |
| C. | 1.2λ |
| D. | 1.5λ |
| Answer» B. 0.3λ | |
| 491. |
In java, ____________________ takes care of managing memory for objects dynamically. |
| A. | Free collector |
| B. | Dust collector |
| C. | Memory manager |
| D. | Garbage collector |
| Answer» E. | |
| 492. |
Choose the wrong statement from the given set of statements? |
| A. | All operators in C#.NET cannot be overloaded |
| B. | We can use the new modifier to modify a nested type if the nested type is hiding another type |
| C. | Operator overloading permits the use of symbols to represent computations for a type |
| D. | In case of operator overloading all parameters must be of different type than the class or struct that declares the operators |
| Answer» E. | |
| 493. |
What is the vector in operator overloading? |
| A. | class |
| B. | method() |
| C. | data type |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 494. |
Choose the correct statement among the below mentioned statements. |
| A. | Forgetting to declare an operator method as public |
| B. | Forgetting to declare an operator method as static |
| C. | Forgetting to return a bool type value while overloading a relational operator |
| D. | All of the mentioned |
| Answer» E. | |
| 495. |
Correct method to define + operator is? |
| A. | public sample operator +(int a, int b)b) public abstract operator +(int a, int b)c) public static sample operator +(int a, int b)d) public abstract sample operator +(int a, int |
| B. | public abstract operator +(int a, int b) |
| C. | public static sample operator +(int a, int b) |
| D. | public abstract sample operator +(int a, int b) |
| Answer» D. public abstract sample operator +(int a, int b) | |
| 496. |
Which statements are correct about operator overloading? |
| A. | Mathematical or physical modeling where we use classes to represent objects such as vectors, matrices, complex-numbers etc |
| B. | Graphical programs where coordinate related objects are used to represent positions on the screen |
| C. | Financial programs where a class represents an amount of money |
| D. | All of the mentioned |
| Answer» E. | |
| 497. |
Operators that can be overloaded are? |
| A. | || |
| B. | ‘+=’ |
| C. | + |
| D. | [] |
| Answer» D. [] | |
| 498. |
Arrange the following overloaded operators in increasing order of precedence? |
| A. | ‘%’ < ‘<<‘ < ‘+’ < ‘-‘ < ‘&’ < ‘/’ |
| B. | ‘<<‘ < ‘&’ < ‘%’ < ‘-‘ < ‘/’ < ‘+’ |
| C. | ‘&’ < ‘-‘ <‘%’ < ‘<<‘ < ‘/’ < ‘+’ |
| D. | ‘/’ < ‘-‘ < ‘%’ < ‘+’ < ‘<<‘ < ‘&’View Answer |
| Answer» C. ‘&’ < ‘-‘ <‘%’ < ‘<<‘ < ‘/’ < ‘+’ | |
| 499. |
Which of the following statements are correct in nature? |
| A. | The conditional logical operators cannot be overloaded |
| B. | The array indexing operator can be overloaded |
| C. | A public or nested public preference type does not overload the equality operator |
| D. | None of the mentioned |
| Answer» B. The array indexing operator can be overloaded | |
| 500. |
Which of the following keyword is used to overload user defined types by defining static member functions? |
| A. | op |
| B. | opoverload |
| C. | operator |
| D. | operatoroverload |
| Answer» D. operatoroverload | |