MCQOPTIONS
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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.
| 501. |
Determine the required thrust coefficient to produce thrust of 1000N. Given diameter is 1.2m and n=22 rps. |
| A. | 0.813 |
| B. | 0.1 |
| C. | 0.32 |
| D. | 0.489 |
| Answer» B. 0.1 | |
| 502. |
If a propeller has bhp of 700 and diameter as 1.2 ft. and rotating with 20 rps then, determine power coefficient. Consider sea level density. |
| A. | 15.8 |
| B. | 1.8 |
| C. | 30.2 |
| D. | 40 |
| Answer» B. 1.8 | |
| 503. |
If a propeller has speed of 600 rpm and diameter of 1.2m and velocity of 10m/s. Find advance ratio. |
| A. | 0.83 |
| B. | 0.39 |
| C. | 0.289 |
| D. | 0.1 |
| Answer» B. 0.39 | |
| 504. |
Following diagram represents ________ |
| A. | bhp variation with altitude |
| B. | drag polar |
| C. | lift curve |
| D. | power required vs thrust required |
| Answer» B. drag polar | |
| 505. |
Supercharger is used to improve __________ |
| A. | intake manifold pressure |
| B. | outlet pressure |
| C. | to increase charging capacity of an electric charger |
| D. | expansion of exhaust velocity |
| Answer» B. outlet pressure | |
| 506. |
A piston engine has bhp of 600 at sea level. Now, if engine is operating at an altitude where density ratio is 0.816 then, find the value bhp at that altitude. |
| A. | 37 |
| B. | 89 |
| C. | 100 |
| D. | 289 |
| Answer» B. 89 | |
| 507. |
Mass flow rate will be affected by __________ |
| A. | altitude |
| B. | weight of the aileron |
| C. | induced drag only |
| D. | longerons weight |
| Answer» B. weight of the aileron | |
| 508. |
The symbol σ̅, represent which of the following term? |
| A. | Ultimate bearing capacity |
| B. | Effective surcharge |
| C. | Gross pressure intensity |
| D. | Bearing capacity |
| Answer» C. Gross pressure intensity | |
| 509. |
Rankine considered the equilibrium of second soil element at __________ |
| A. | Base of the structure |
| B. | Below the foundation |
| C. | Edge of the footing |
| D. | Top of the foundation |
| Answer» D. Top of the foundation | |
| 510. |
The bearing capacity of cohesion-less soil at the ground surface is __________ |
| A. | Unity |
| B. | Less than one |
| C. | Zero |
| D. | Greater than one |
| Answer» D. Greater than one | |
| 511. |
The safe bearing capacity can also be referred as _________ |
| A. | Net safe bearing capacity |
| B. | Ultimate bearing capacity |
| C. | Safe bearing pressure |
| D. | Net soil pressure |
| Answer» C. Safe bearing pressure | |
| 512. |
The ultimate bearing capacity and the net ultimate capacity are connected by the relation ____________ |
| A. | qf = qnf +/- σ̅ and qf = qf – σ̅ |
| B. | qf = qnf – σ̅ |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. qf = qnf – σ̅ | |
| 513. |
The gross pressure intensity (q) of a structure is ___________ |
| A. | Total pressure at base of the footing |
| B. | Excess pressure after the construction of the structure |
| C. | Minimum pressure intensity at the base |
| D. | None of the mentioned |
| Answer» B. Excess pressure after the construction of the structure | |
| 514. |
The AFM uses a _______________ to scan the surface of a molecule. |
| A. | X-ray film |
| B. | Nanosized tip |
| C. | Non-metal tip |
| D. | Nanodrop |
| Answer» C. Non-metal tip | |
| 515. |
In SEM, the image is formed by the electrons that _________________ |
| A. | reflect back |
| B. | ionize |
| C. | undergo inversion |
| D. | pass through |
| Answer» B. ionize | |
| 516. |
At the critical drying point, there is no surface tension between ________________ |
| A. | gas and oil |
| B. | gas and liquid |
| C. | liquid and liquid |
| D. | oil and liquid |
| Answer» C. liquid and liquid | |
| 517. |
In the preparation of samples for SEM, the specimens are air-dried by a process of critical-point drying. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 518. |
The scanning electron microscope is used to examine _____________ |
| A. | antigens |
| B. | antibodies |
| C. | anticoaggulants |
| D. | cell surfaces |
| Answer» E. | |
| 519. |
The proper watering or curing for a period of at least 10 days should be done to the missionary work in case of ________ |
| A. | Horizontal movement of the earth |
| B. | Unequal settlement of the masonry |
| C. | Unequal settlement of the sub-soil |
| D. | Lateral pressure on the superstructure |
| Answer» C. Unequal settlement of the sub-soil | |
| 520. |
In case of ________ it is seen that the allowable bearing pressure on the soil is not exceeded, even under the worst conditions. |
| A. | Withdrawal of moisture from the sub-soil |
| B. | Transpiration of trees and shrubs |
| C. | Unequal settlement of the sub-soil |
| D. | Atmospheric action |
| Answer» D. Atmospheric action | |
| 521. |
________ results rain water carrying certain Chemicals and salt which reacts with the material used for the foundation work and turn them into powder. |
| A. | Atmospheric action |
| B. | Unequal settlement of the soil |
| C. | Lateral pressure on the superstructure |
| D. | Transpiration of trees and shrubs |
| Answer» B. Unequal settlement of the soil | |
| 522. |
_______ occurs due to various reasons such as unequal distribution of load on the foundations, varying bearing power of the sub soil, eccentricity of the load, etc. |
| A. | Unequal settlement of the sub-soil |
| B. | Unequal settlement of the masonry |
| C. | Horizontal movement of the earth |
| D. | Withdrawal of moisture from the sub-soil |
| Answer» B. Unequal settlement of the masonry | |
| 523. |
When did the National Green Tribunal Act constituted? |
| A. | 2000 |
| B. | 2005 |
| C. | 2010 |
| D. | 2015 |
| Answer» D. 2015 | |
| 524. |
In how many tier programs the inland water quality monitoring network is operating? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» D. Four | |
| 525. |
When did the Karnataka State Pollution Control Board for Prevention and Control of Water Pollution constituted? |
| A. | 1974 |
| B. | 1978 |
| C. | 1982 |
| D. | 1985 |
| Answer» B. 1978 | |
| 526. |
When did the Central Pollution Control Board established? |
| A. | 1970 |
| B. | 1972 |
| C. | 1974 |
| D. | 1976 |
| Answer» D. 1976 | |
| 527. |
A string of length 0.4m and mass 10(-2) kg is tightly clamped at its ends. The tension in the string is 1.6N. Identical wave pulses are produced at one end at equal intervals of time, ∆t. The minimum value of ∆t which allows constructive interference between successive pulses is? |
| A. | 0.05s |
| B. | 0.10s |
| C. | 0.20s |
| D. | 0.40s |
| Answer» C. 0.20s | |
| 528. |
An organ pipe P1 closed at one end of vibrating in its first harmonic and another pipe P2 open at both ends vibrating in its third harmonic are in resonance with a given tuning fork. The ratio of the length of P1 to that of P2 is? |
| A. | 8/3 |
| B. | 3/8 |
| C. | 1/6 |
| D. | 1/3 |
| Answer» D. 1/3 | |
| 529. |
A tube closed at one end and containing air produces, when excited, the fundamental note of frequency 512Hz. If the tube is open at both ends, the fundamental frequency that can be excited is (in Hz). |
| A. | 1024 |
| B. | 512 |
| C. | 256 |
| D. | 128 |
| Answer» B. 512 | |
| 530. |
The displacement of particles in a string stretched in the x-direction is represented by y. Among the following expressions for y, those describing wave motion are ____________ |
| A. | coskxsinωt |
| B. | k2 ω2-ω2 t2 |
| C. | cos2 (kx+ωt) |
| D. | cos2 (k2 x2-ω2 t2) |
| Answer» B. k2 ω2-ω2 t2 | |
| 531. |
A transverse wave is described by the equationy=y0 sin2π(ft-x/ʎ)The maximum particles velocity is equal to four times the wave velocity if? |
| A. | ʎ=πy0/4 |
| B. | ʎ=πy0/2 |
| C. | ʎ=πy0 |
| D. | ʎ=2πy0 |
| Answer» C. ʎ=πy0 | |
| 532. |
A siren placed at a railway platform is emitting sound of frequency 5kHz. A passenger sitting in a moving train ‘A’ records a frequency of 5.5 kHz while the train approaches the siren. During his return journey in a different train B he records a frequency of 6kHz while approaching the same siren. The ratio of the velocity of train B to that train A is? |
| A. | 242/252 |
| B. | 2 |
| C. | 5/6 |
| D. | 11/6 |
| Answer» C. 5/6 | |
| 533. |
A train moves towards a stationary observer with speed 34m/s. The train sounds a whistle and its frequency registered by the observer is f1. If the train’s speed is reduced to 17m/s, the frequency registered is f2. If the speed of sound is 340m/s, then the ratio f1/f2 is? |
| A. | 18/19 |
| B. | 1/2 |
| C. | 2 |
| D. | 19/18 |
| Answer» E. | |
| 534. |
A whistle giving out 450Hz approaches a stationary observer at a speed of 33m/s. The frequency heard by the observer in Hz is (speed of sound = 330m/s). |
| A. | 409 |
| B. | 429 |
| C. | 517 |
| D. | 500 |
| Answer» E. | |
| 535. |
A vibrating string of length l under a tension T resonates with a mode corresponding to the first overtone (third harmonic) of an air column of length 75cm inside a tube closed at one end. The string also generates 4 beats per second when excited along with a tuning fork of frequency n. Now when the tension of the string is slightly increased the number of sound in sir to 340m/s, the frequency n of the tuning fork in Hz is? |
| A. | 344 |
| B. | 336 |
| C. | of an air column of length 75cm inside a tube closed at one end. The string also generates 4 beats per second when excited along with a tuning fork of frequency n. Now when the tension of the string is slightly increased the number of sound in sir to 340m/s, the frequency n of the tuning fork in Hz is?a) 344b) 336c) 117.3 |
| D. | 109.3 |
| Answer» B. 336 | |
| 536. |
Two plane harmonic sound waves are expressed by the equations:y1 (x,t)=Acos(0.5πx-100πt)y2 (x,t)=Acos(0.46πx-92πt)All the parameters are in mks system. How many times does an observer hear maximum intensity in one second? |
| A. | 4 |
| B. | 6 |
| C. | 8 |
| D. | 10 |
| Answer» B. 6 | |
| 537. |
Blood glucose level measurement device uses a biosensor works on the principle of _____________ |
| A. | electromechanical |
| B. | electrochemical |
| C. | electrothermal |
| D. | electroresistive |
| Answer» C. electrothermal | |
| 538. |
Home blood glucose measurement devices measure the glucose level through an invasive method. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 539. |
____________ is a wireless ECG acquiring system. |
| A. | pregelled disposable electrodes |
| B. | smart pad |
| C. | pasteless electrodes |
| D. | limb electrodes |
| Answer» C. pasteless electrodes | |
| 540. |
What is the working principle behind Home blood glucose sensor? |
| A. | electro-physiological |
| B. | electrochemical |
| C. | chemical |
| D. | physio-chemical |
| Answer» C. chemical | |
| 541. |
Which of the following is used to determine the biological response of the biosensor? |
| A. | artificial membrane |
| B. | chemical membrane |
| C. | physio-chemical membrane |
| D. | biocatalytic membrane |
| Answer» E. | |
| 542. |
Which of the following sensor is used for Endoscopic imaging? |
| A. | thermal sensors |
| B. | optic fiber sensors |
| C. | chemical sensors |
| D. | pressure sensors |
| Answer» C. chemical sensors | |
| 543. |
Monopolar needle electrode has a coating of______________ material over the stainless steel wires which are bare only at the tips. |
| A. | carbon |
| B. | calcium |
| C. | teflon |
| D. | sodium |
| Answer» D. sodium | |
| 544. |
Which of the following is the principle behind Fluoroptic temperature sensors working? |
| A. | optical fiber |
| B. | thermistor |
| C. | thermocouple |
| D. | rtd |
| Answer» B. thermistor | |
| 545. |
What is the principle behind Doppler velocimetry working? |
| A. | amplitude measurement of fiber optic sensor |
| B. | frequency measurement of fiber optic sensor |
| C. | time shift measurement of fiber optic sensor |
| D. | phase measurement of fiber optic sensor |
| Answer» C. time shift measurement of fiber optic sensor | |
| 546. |
A system with gain margin close to unity and phase margin close to zero is : |
| A. | Highly stable |
| B. | Oscillatory |
| C. | Relatively stable |
| D. | Unstable |
| Answer» D. Unstable | |
| 547. |
The LVDT is used in the measurement of: |
| A. | Displacement |
| B. | Acceleration |
| C. | Velocity |
| D. | Humidity |
| Answer» B. Acceleration | |
| 548. |
Given a unity feedback control system with G (s) = K/s(s+4), the value of K for which the damping ratio is 0.5. |
| A. | 1 |
| B. | 16 |
| C. | 64 |
| D. | 32 |
| Answer» C. 64 | |
| 549. |
If the system matrix of a linear time invariant continuous system is given byIts characteristic equation is given by: |
| A. | s2+5s+3=0 |
| B. | s2-3s-5=0 |
| C. | s2+3s+5=0 |
| D. | s2+s+2=0 |
| Answer» B. s2-3s-5=0 | |
| 550. |
Consider the function F (s) =5/s (s2+s+2) , where F (s) is the Laplace transform f (t). Then the final value theorem is equal to |
| A. | 5 |
| B. | 5/2 |
| C. | Zero |
| D. | Infinity |
| Answer» C. Zero | |