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MCQOPTIONS
This section includes 2095 Mcqs, each offering curated multiple-choice questions to sharpen your Php knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
The equation 2s4+s3+3s2+5s+10=0 has roots in the left half of s–plane: |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 552. |
For a type one system, the steady – state error due to step input is equal to |
| A. | Infinite |
| B. | Zero |
| C. | 0.25 |
| D. | 0.5 |
| Answer» C. 0.25 | |
| 553. |
The impulse response of a LTI system is a unit step function, then the corresponding transfer function is |
| A. | 1/s |
| B. | 1/s2 |
| C. | 1 |
| D. | s |
| Answer» B. 1/s2 | |
| 554. |
What affects crystal growth? |
| A. | Temperature |
| B. | Pressure |
| C. | Evaporation |
| D. | Evaporation, pressure and temperature |
| Answer» E. | |
| 555. |
Which of the following statements about seed crystal are correct?Statement 1: Seed crystal provides a nucleation site.Statement 2: The recrystallization is done by seed crystal. |
| A. | True, False |
| B. | True, True |
| C. | False, True |
| D. | False, False |
| Answer» C. False, True | |
| 556. |
What is classical nucleation theory? |
| A. | To study the kinetics of nucleation |
| B. | To study the nucleation statists |
| C. | To study the concentration of nucleation |
| D. | To study the nucleation temperature |
| Answer» B. To study the nucleation statists | |
| 557. |
What is the first step in crystallization? |
| A. | Nucleation |
| B. | Cooling |
| C. | Super-cooling |
| D. | Pre-crystallization |
| Answer» B. Cooling | |
| 558. |
What is the other name for super-cooling? |
| A. | Undercooling |
| B. | Overcooling |
| C. | Cooling |
| D. | Super cooling |
| Answer» B. Overcooling | |
| 559. |
How can supersaturated solution used in marine ecologist? |
| A. | To study the activity of organisms |
| B. | Tostudy the concentration of water |
| C. | To study the patterns of the organisms |
| D. | To detect the populations adaption |
| Answer» B. Tostudy the concentration of water | |
| 560. |
Which of the industry uses the In vivo supersaturation phenomenon? |
| A. | Fashion industry |
| B. | Pharma industry |
| C. | Food industry |
| D. | Cement industry |
| Answer» C. Food industry | |
| 561. |
What is the principle of supersaturation in vapor phase? |
| A. | Poynting effect |
| B. | Gibbs–Thomson effect and Poynting effect |
| C. | Kelvin equation and Gibbs–Thomson effect |
| D. | Kelvin equation, Gibbs–Thomson effect and Poynting effect |
| Answer» E. | |
| 562. |
What is supersaturation? |
| A. | Has a higher vapor pressure than that of vapor pressure of that compound |
| B. | Has a lower vapor pressure than that of vapor pressure of that compound |
| C. | Has equal pressure similar to vapor pressure of that compound |
| D. | Does not depend on vapor pressure of that compound |
| Answer» B. Has a lower vapor pressure than that of vapor pressure of that compound | |
| 563. |
What happens when supersaturated solution is cooled down? |
| A. | Solid crystals will dissolve into the water |
| B. | Solid crystals remain as it is in water |
| C. | Solid crystals will grow in bigger size |
| D. | Solid crystals will shrink into smaller size |
| Answer» B. Solid crystals remain as it is in water | |
| 564. |
If Vi = 0.5 V, what is the maximum frequency before the output distorts? |
| A. | 31.8 kHz |
| B. | 318 kHz |
| C. | 3.18 kHz |
| D. | 3.18 MHz |
| Answer» B. 318 kHz | |
| 565. |
An op amp having a slew rate of 20 V/µs is to be used in the unity-gain follower configuration, with input pulses that rise from 0 to 3 V. What is the shortest pulse that can be used while ensuring full-amplitude output? |
| A. | 0.10 µs |
| B. | 0.15 µs |
| C. | 0.20 µs |
| D. | 0.30 µs |
| Answer» C. 0.20 µs | |
| 566. |
For operation with 10-V output pulses with the requirement that the sum of the rise and fall times represent only 20% of the pulse width (at half amplitude), what is the slew-rate requirement for an op amp to handle pulses 2 µs wide? (Note: The rise and fall times of a pulse signal are usually measured between the 10%- and 90%-height points.) |
| A. | 10 V/µs |
| B. | 20 V/µs |
| C. | 40 V/µs |
| D. | 80 V/µs |
| E. | , what is the slew-rate requirement for an op amp to handle pulses 2 µs wide? (Note: The rise and fall times of a pulse signal are usually measured between the 10%- and 90%-height points.)a) 10 V/µsb) 20 V/µsc) 40 V/µsd) 80 V/µs |
| Answer» D. 80 V/µs | |
| 567. |
A particular op amp using ±15-V supplies operates linearly for outputs in the range −12 V to +12 V. If used in an inverting amplifier configuration of gain –100, what is the rms value of the largest possible sine wave that can be applied at the input without output clipping? |
| A. | 120 mV |
| B. | 60 mV |
| C. | 84.85 mV |
| D. | 42.42 mV |
| Answer» D. 42.42 mV | |
| 568. |
The full-power bandwidth, fM, is the maximum frequency at which |
| A. | an output sinusoid with an amplitude equal to the op-amp rated output voltage (Vo max) can be produced without distortion |
| B. | it is the range of the frequencies in which the amplitude of output signal is equal to or greater than half of the op-amp rated output voltage |
| C. | it is the range of the frequencies in which the amplitude of output signal is equal to or less than half of the op-amp rated output voltage |
| D. | It is the range of the frequencies in which the power gain is half or more than half of the maximum rated power gain of the op-amp |
| Answer» B. it is the range of the frequencies in which the amplitude of output signal is equal to or greater than half of the op-amp rated output voltage | |
| 569. |
Determine the slew rate of the amplifier having full power bandwidth f0 and the rated output voltage as V0. Given that the input signal is of sinusoidal nature. |
| A. | 2πf0 V0 |
| B. | V0 / 2πf0 |
| C. | V0 / f0 |
| D. | f0 V0 |
| Answer» B. V0 / 2πf0 | |
| 570. |
Slew rate of an amplifier is defined as |
| A. | Minimum rate of change of the output possible in a real operational amplifier |
| B. | Maximum rate of change of the output possible in a real operational amplifier |
| C. | Average rate of change of the output possible in a real operational amplifier |
| D. | Ratio of the maximum and the average rate of change of the output in a real amplifier |
| Answer» C. Average rate of change of the output possible in a real operational amplifier | |
| 571. |
Phenyl group show __________ |
| A. | (+M) effect |
| B. | (+E) effect |
| C. | (+I) effect |
| D. | (-M) effect |
| Answer» E. | |
| 572. |
Greater the number of resonating structures for a given intermediate __________ |
| A. | Less will be its stability |
| B. | More will be its stability |
| C. | It will not affect its stability |
| D. | None of the mentioned |
| Answer» C. It will not affect its stability | |
| 573. |
Select the correct statement from the following option. |
| A. | Benzene ring has two different types of bond length for single and double bonds |
| B. | All the bond length in benzene ring is equal due to hyperconjugation |
| C. | All the bond length in benzene ring is equal due to resonance |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 574. |
Dipole moment of CH3-CH2-Cl > CH2=CH-Cl. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 575. |
Which of the following is an application of the mesomeric effect? |
| A. | Dipole moment |
| B. | Strength of acids and bases |
| C. | Bond length |
| D. | All of the mentioned |
| Answer» E. | |
| 576. |
The resonance energy is defined as a difference in energy between __________ |
| A. | Two consecutive resonating structures |
| B. | Resonance hybrid and most unstable resonating structure |
| C. | Resonance hybrid and most stable resonating structure |
| D. | First and last resonating structures |
| Answer» D. First and last resonating structures | |
| 577. |
The phenomenon in which 2 or more structures, involving identical position of atoms can be written for a particular molecule, is called __________ |
| A. | Conjugation |
| B. | Resonance |
| C. | Hyper conjugation |
| D. | Vibration |
| Answer» C. Hyper conjugation | |
| 578. |
In mesomeric effect, the electrons are transferred from __________ |
| A. | A multiple bonds to an atom |
| B. | A multiple bonds to a single covalent bond |
| C. | An atom with a lone pair to the adjacent single covalent bond |
| D. | All of the mentioned |
| Answer» E. | |
| 579. |
Which body part contains the largest microbial population? |
| A. | stomach |
| B. | small intestine |
| C. | large intestine |
| D. | mouth |
| Answer» D. mouth | |
| 580. |
Enterococci is found in which part of the intestine? |
| A. | duodenum |
| B. | jejunum |
| C. | ileum |
| D. | large intestine |
| Answer» C. ileum | |
| 581. |
Which of the following microorganism is found in the gingival crevices at puberty? |
| A. | Lactobacillus |
| B. | Treponema sp. |
| C. | Actinomyces |
| D. | S.mutans |
| Answer» C. Actinomyces | |
| 582. |
Saliva generally has a microbial population of _______ bacteria per milliliter. |
| A. | 100 |
| B. | 1000 |
| C. | 105 |
| D. | 108 |
| Answer» E. | |
| 583. |
Which of the following viruses are termed as ‘orphan’ viruses? |
| A. | retroviruses |
| B. | echoviruses |
| C. | coxsackieviruses |
| D. | adenoviruses |
| Answer» C. coxsackieviruses | |
| 584. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and B parameters and find ‘A*C*D’ value.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | ZY+(YZ)2 |
| B. | (1+YZ)* Z |
| C. | YZ+YZ2 |
| D. | 1-YZ+ZY2 |
| Answer» B. (1+YZ)* Z | |
| 585. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and B parameters and find ‘AD-BC’ value.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | Z-Y+YZ2 |
| B. | (1+YZ)* Z |
| C. | YZ+YZ2 |
| D. | 1 |
| Answer» E. | |
| 586. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and B parameters and find ‘AB-CD’ value.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | Z-Y+YZ2 |
| B. | (1+YZ)* Z |
| C. | 1+YZ+YZ2 |
| D. | 1-YZ+ZY2 |
| Answer» B. (1+YZ)* Z | |
| 587. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and B parameters and find ‘C*D’ value.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | (1+YZ) |
| B. | (1+YZ)* Z |
| C. | Z |
| D. | Y |
| Answer» B. (1+YZ)* Z | |
| 588. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and B parameters and find ‘B*C’ value.Vs = A*Vr + B*IrIs = C*Vr + D*Ir |
| A. | (1+YZ) |
| B. | (1+YZ)* Z |
| C. | 1 |
| D. | YZ |
| Answer» B. (1+YZ)* Z | |
| 589. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and B parameters and find ‘B*D’ value.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | (1+YZ) |
| B. | (1+YZ)* Z |
| C. | Z |
| D. | YZ |
| Answer» D. YZ | |
| 590. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and B parameters and find ‘A*D’ value.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | (1+YZ) |
| B. | (1+YZ)* Z |
| C. | 1 |
| D. | 0 |
| Answer» B. (1+YZ)* Z | |
| 591. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and B parameters and find ‘A*C’ value.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | (1+YZ)* Y |
| B. | (1+YZ)* Z |
| C. | Y*( 1+YZ) |
| D. | (1+YZ)*Y-1+Z |
| Answer» B. (1+YZ)* Z | |
| 592. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and B parameters and find AB value.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | (1+YZ)* Z |
| B. | 1+YZ* Z |
| C. | Y*( 1+YZ) |
| D. | (1+YZ)*Y-1+Z |
| Answer» B. 1+YZ* Z | |
| 593. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify D and A parameters.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | 1+YZ, Z |
| B. | 1+ZY, 1 |
| C. | Y, 1+YZ |
| D. | 1, 1+YZ |
| Answer» B. 1+ZY, 1 | |
| 594. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify C and A parameters.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | 1+YZ, Z |
| B. | Z,Y |
| C. | Y, 1+YZ |
| D. | 1+YZ, Y-1+Z |
| Answer» D. 1+YZ, Y-1+Z | |
| 595. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify B and A parameters.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | 1+YZ, Z |
| B. | Z,YZ+1 |
| C. | Z, 1+YZ |
| D. | 1+YZ, Y-1+Z |
| Answer» C. Z, 1+YZ | |
| 596. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and D parameters.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | 1+YZ, 1 |
| B. | 1+YZ, Z |
| C. | Y, 1+YZ |
| D. | 1+YZ, Y-1+Z |
| Answer» B. 1+YZ, Z | |
| 597. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and C parameters.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | 1+YZ, Z |
| B. | Z,Y |
| C. | 1+YZ, Y |
| D. | 1+YZ, Y-1+Z |
| Answer» D. 1+YZ, Y-1+Z | |
| 598. |
The transmission line equations are given by the below set of equations based on the line diagram as given. Identify A and B parameters.Vs = A*Vr+B*IrIs = C*Vr+D*Ir |
| A. | 1+YZ, Z |
| B. | Z,Y |
| C. | Y, 1+YZ |
| D. | 1+YZ, Y-1+Z |
| Answer» B. Z,Y | |
| 599. |
Stiffness coefficients are used in which of the following method? |
| A. | force method |
| B. | displacement method |
| C. | both force and displacement method |
| D. | virtual force method |
| Answer» C. both force and displacement method | |
| 600. |
Redundant forces are calculated in last step while using force method.State whether the above statement is true or false. |
| A. | true |
| B. | false |
| Answer» C. | |