MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 2670 Mcqs, each offering curated multiple-choice questions to sharpen your Railways knowledge and support exam preparation. Choose a topic below to get started.
| 1451. |
Flow through a supersonic nozzle is an example of: |
| A. | Isolated system |
| B. | open system |
| C. | closed system |
| D. | insulated system |
| Answer» C. closed system | |
| 1452. |
Which of the following device is used to measure flow on the application of Bernoulli's theorem: |
| A. | venturimeter |
| B. | orifice plate |
| C. | Pivot tude |
| D. | All of these |
| Answer» E. | |
| 1453. |
A streamline and an equipotential line in a flow field |
| A. | are parallel to each other |
| B. | are perpendicular to each other |
| C. | intersect at an acute angle |
| D. | are identical |
| Answer» C. intersect at an acute angle | |
| 1454. |
A pivot tube is used for measuring: |
| A. | pressure of flow |
| B. | velocity of flow |
| C. | flow rate |
| D. | total energy |
| Answer» C. flow rate | |
| 1455. |
It \[\frac{P}{\rho g}+\frac{{{v}^{2}}}{2g}+z=\]constant is a Bernoulli's equation, with their usual meanings then the term \[\frac{{{v}^{2}}}{2g}\]represents: |
| A. | kinetic energy |
| B. | Pressure energy |
| C. | kinetic energy/unit weight |
| D. | None of these |
| Answer» D. None of these | |
| 1456. |
Ratio of inertia force to surface tension is termed as: |
| A. | Mach number |
| B. | Froude number |
| C. | Reynolds?s Number |
| D. | Weber's number |
| Answer» B. Froude number | |
| 1457. |
The most essential feature of the turbulent flow is: |
| A. | Large discharge |
| B. | Small discharge |
| C. | High velocity |
| D. | Velocity and pressure at a point shows irregular fluctuations at high frequency |
| Answer» D. Velocity and pressure at a point shows irregular fluctuations at high frequency | |
| 1458. |
The concept of stream function which is based on the principle of continuity is applicable to: |
| A. | Three ? dimensional flow |
| B. | Two ? dimensional flow |
| C. | One ? dimensional flow |
| D. | None of these |
| Answer» C. One ? dimensional flow | |
| 1459. |
The shear stress in a turbulent pipe flow: |
| A. | varies parabolic ally with radius |
| B. | is constant over the pipe radius |
| C. | is zero at centre and increases linearly to the wall |
| D. | None of these |
| Answer» D. None of these | |
| 1460. |
In a turbulent flow through a pipe, the shear stress is : |
| A. | Maximum at centre and decreased linearly towards the wall |
| B. | Maximum at centre and decreased logarithmically towards the wall |
| C. | Maximum midway between the centre ? line and the wall |
| D. | Maximum at the wall and decreases linearly to zero at the centre |
| Answer» C. Maximum midway between the centre ? line and the wall | |
| 1461. |
Resultant force on a floating body will act: |
| A. | vertically upwards through meta centre |
| B. | vertically down wards through metal centre |
| C. | vertically upwards through centre of buoyancy |
| D. | vertically downwards through centre of buoyancy |
| Answer» D. vertically downwards through centre of buoyancy | |
| 1462. |
The desirable properties for any practical fluids are: |
| A. | should be viscous |
| B. | should posses surface tension |
| C. | should be compressible |
| D. | All of the above |
| Answer» E. | |
| 1463. |
For the continuity equation given\[\nabla \centerdot \overrightarrow{v}=0\]to be valid, when\[\overrightarrow{v}\]is the velocity vector, which one of the following is a necessary condition? |
| A. | Steady flow |
| B. | Irrigational flow |
| C. | Invescid flow |
| D. | Incompressible flow |
| Answer» E. | |
| 1464. |
A piezometer tube is used for the purpose of measurement of: |
| A. | Low pressure |
| B. | High pressure |
| C. | Moderate pressure |
| D. | Vacuum pressure |
| Answer» D. Vacuum pressure | |
| 1465. |
Falling drops of water become spherical in shape due to the property of: |
| A. | adhesion |
| B. | cohesion |
| C. | surface tension |
| D. | viscosity |
| Answer» D. viscosity | |
| 1466. |
Hydrostatic low states that the rate of increase of pressure in vertical direction is equal to: |
| A. | fluid density |
| B. | fluid specific weight |
| C. | fluid weight |
| D. | fluid specific gravity |
| Answer» C. fluid weight | |
| 1467. |
The difference of pressure between inside and outside of a liquid drop is |
| A. | \[\Delta P=T\times r\] |
| B. | \[\Delta P=\frac{T}{r}\] |
| C. | \[\Delta P=\frac{T}{2r}\] |
| D. | \[\Delta P=\frac{2T}{r}\] |
| Answer» E. | |
| 1468. |
Void ratio does not depend upon : |
| A. | Liquid limit |
| B. | Volume |
| C. | Bulk volume |
| D. | Porosity |
| Answer» B. Volume | |
| 1469. |
Kinematic viscosity is equal to: |
| A. | Dynamic viscosity \[\times \] density |
| B. | \[\frac{\text{Dynamic}\,\,\text{viscosity}}{\text{Density}}\] |
| C. | \[\frac{\text{Density}}{\text{Dynamic}\,\,\text{viscosity}}\] |
| D. | \[\frac{\text{1}}{\text{Dynamic}\,\,\text{viscosity}\,\,\text{Density}}\] |
| Answer» C. \[\frac{\text{Density}}{\text{Dynamic}\,\,\text{viscosity}}\] | |
| 1470. |
Gauge pressure is equal to : |
| A. | absolute pressure + atmospheric pressure |
| B. | absolute pressure \[-\] atmospheric pressure |
| C. | atmospheric pressure \[-\] absolute pressure |
| D. | atmospheric pressure \[-\] vaccum |
| Answer» C. atmospheric pressure \[-\] absolute pressure | |
| 1471. |
In case of a static fluid: |
| A. | only normal stresses can exist |
| B. | linear deformation is small |
| C. | fluid pressure is zero |
| D. | resistance to shear stress is small |
| Answer» B. linear deformation is small | |
| 1472. |
In a two-dimensional velocity field with velocities u and v along the x and y directions respectively, the convective acceleration along the x-direction is given by |
| A. | \[u\frac{\partial u}{\partial x}+v\frac{\partial u}{\partial y}\] |
| B. | \[u\frac{\partial u}{\partial x}+v\frac{\partial u}{\partial y}\] |
| C. | \[u\frac{\partial v}{\partial x}+v\frac{\partial u}{\partial y}\] |
| D. | \[v\frac{\partial u}{\partial x}+u\frac{\partial u}{\partial y}\] |
| Answer» B. \[u\frac{\partial u}{\partial x}+v\frac{\partial u}{\partial y}\] | |
| 1473. |
Surface tension is a phenomenon because of: |
| A. | viscous forces only |
| B. | Adhesion between liquid and solid molecules |
| C. | Difference in magnitude between the forces due to adhesin and cohesion |
| D. | cohesion only |
| Answer» E. | |
| 1474. |
Which of the following is the unit of kinematic viscosity? |
| A. | \[N-S/{{m}^{2}}\] |
| B. | \[{{m}^{2}}/s\] |
| C. | \[kg/s{{m}^{2}}\] |
| D. | \[m/kg-s\] |
| Answer» C. \[kg/s{{m}^{2}}\] | |
| 1475. |
Poise is the unit of: |
| A. | dynamic viscosity |
| B. | kinematic viscosity |
| C. | mass density |
| D. | velocity gradient |
| Answer» B. kinematic viscosity | |
| 1476. |
An ideal fluid is defined as the fluid which: |
| A. | is compressible |
| B. | is in compressible |
| C. | is in compressible and non-viscous |
| D. | has negligible surface tension |
| Answer» D. has negligible surface tension | |
| 1477. |
Pseudo plastic is a liquid for which |
| A. | dynamic viscosity decreases as the rate of shear increases |
| B. | Newton's law of viscosity holds good |
| C. | dynamic viscosity increases as the rate of shear increases |
| D. | dynamic viscosity increases with the time for which shearing forces are applied. |
| Answer» B. Newton's law of viscosity holds good | |
| 1478. |
The cause of turbulence in fluid flow may be |
| A. | high Reynold number |
| B. | abrupt discontinuity in velocity distribution |
| C. | critical Reynold number |
| D. | existence of velocity gradient without abrupt discontinuity |
| Answer» E. | |
| 1479. |
For an irrational flow the equation \[\frac{{{\partial }^{2}}\phi }{\partial {{x}^{2}}}+\frac{{{\partial }^{2}}\phi }{\partial {{y}^{2}}}\]is known as |
| A. | Bernoulli's equation |
| B. | Cauchy Riemann's equation |
| C. | Euler's equation |
| D. | Laplace equation. |
| Answer» E. | |
| 1480. |
Which of the following flow measurement device is independent of density? |
| A. | Electro ? magnetic flow meter |
| B. | Orifice plate |
| C. | Turbine meter |
| D. | Venturi-meter |
| Answer» B. Orifice plate | |
| 1481. |
The capillary rise in a narrow two-dimensional slit of width 'w' is |
| A. | half of that in a capillary tube of diameter 'w' |
| B. | two-third of that in a capillary tube of diameter ?w? |
| C. | one-third of that in a capillary tube of diameter 'w' |
| D. | one-fourth of that in a capillary tube of diameter 'w' |
| Answer» B. two-third of that in a capillary tube of diameter ?w? | |
| 1482. |
The velocity components in the x and y direction of a two dimensional potential flow are u and v respectively, then \[\frac{\partial u}{\partial x}\] is equal to |
| A. | \[\frac{\partial v}{\partial x}\] |
| B. | \[-\frac{\partial v}{\partial x}\] |
| C. | \[\frac{\partial v}{\partial y}\] |
| D. | \[-\frac{\partial v}{\partial y}\] |
| Answer» E. | |
| 1483. |
Consider an activity having a duration time \[{{T}_{\text{ij}}}\] E it the earliest occurrence time and L latest occurrence time (see figure given) Consider the following statements in this regard: 1. Total float \[V\text{ }=\text{ }60\text{ }V,\] 2. Free float \[={{E}_{j}}-{{E}_{i}}{{t}_{ij}}\] 3. Slack of the tail event \[={{L}_{j}}-{{E}_{i}}\] Of these statements: |
| A. | 1, 2 and 3 are correct |
| B. | 1 and 2 are correct |
| C. | 1 and 3 are correct |
| D. | 2 and 3 are correct |
| Answer» B. 1 and 2 are correct | |
| 1484. |
Consider the following statements: A nomenclature \[\phi \,50\,H8/p8\] denoted that 1. Hole diameter is 50 mm 2. It is a shaft base system 3. 8 indicates fundamental deviation. Which of the statements given above is/are correct |
| A. | 1, 2 and 3 |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 3 only |
| Answer» D. 3 only | |
| 1485. |
Which one of the following statements is not correct? |
| A. | The operating characteristic curve of acceptance sampling plan shows the ability of the plan to distinguish between good and bad lots |
| B. | No sampling plan can give complete protection against the acceptance of defective products |
| C. | C chart has straight line limits and U chart has zig-zag limits |
| D. | Double sampling result in more inspection than single sampling if the incoming quality is very bad |
| Answer» D. Double sampling result in more inspection than single sampling if the incoming quality is very bad | |
| 1486. |
Quality control chart for averages was maintained for a dimension of the product. After the control was established, it was found that the standard deviation of the process was 1.00 mm. The dimension of the part is \[70\text{ }\pm \text{ }2.5\] mm. Parts above 725 mm can be reworked but parts below 67.5 mm have to be scrapped. What should be the setting of the process to ensure production of no scrap and to minimize the rework? |
| A. | 68.5 mm |
| B. | 70 mm |
| C. | 70.5 mm |
| D. | 725 mm |
| Answer» C. 70.5 mm | |
| 1487. |
Match List I (Quality control concepts) with List II (Quality control techniques) and select the correct answer using the codes given below the lists: List-I (Quality control concepts) List-II (Quality control techniques) A. Tightened and reduced inspection 1. Dodge roming tables B. Lot tolerance percent defective 2. Control chart for variables C. Poisson distribution 3. MIL standards D. Normal distribution 4. Control chart for number of non-conformities Codes: |
| A. | A\[\to \]2, B\[\to \]1, C\[\to \]4, D\[\to \]3 |
| B. | A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 |
| C. | A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]3 |
| D. | A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]2 |
| Answer» D. A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]2 | |
| 1488. |
Consider the following welding processes 1. Arc welding 2. MIG welding 3. Laser beam welding 4. Submerged arc welding Select the correct sequence in increasing order of Heat Affected Zone (HAZ) using the code given below: |
| A. | \[1-2-3-4\] |
| B. | \[1-4-2-3\] |
| C. | \[3-2-4-1\] |
| D. | \[4-3-2-1\] |
| Answer» E. | |
| 1489. |
In which one of the following welding techniques is vacuum environment required? |
| A. | Plasma arc welding |
| B. | Laser beam welding |
| C. | Electron beam welding |
| D. | Ultrasonic welding |
| Answer» D. Ultrasonic welding | |
| 1490. |
Which of the following gases can be used for GMAW as a shielding gas? 1. Argon 2. Oxygen 3. Carbon dioxide Select the correct answer using the code given below: |
| A. | 1, 2 and 3 |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 1 and 3 |
| Answer» E. | |
| 1491. |
Which one of the following welding processes consists of similar Heat Affected Zone (HAZ)? |
| A. | Arc welding |
| B. | Electron beam welding |
| C. | MIG welding |
| D. | Thermite welding |
| Answer» C. MIG welding | |
| 1492. |
Match List-1 with List-11 and Select the correct answer using the codes given below the Lists: List-I (Filler) List-II (Joining process) A. Cu, Zn, Ag alloy 1. Braze welding B. Cu, Sn alloy 2. Brazing C. Pb, Sb alloy 3. Soldering D. Iron oxide and aluminium powder 4. TIG welding of aluminium. Codes: |
| A. | A\[\to \]4, B\[\to \]1, C\[\to \]4, D\[\to \]2 |
| B. | A\[\to \]1, B\[\to \]2, C\[\to \]4, D\[\to \]3 |
| C. | A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 |
| D. | A\[\to \]2, B\[\to \]4, C\[\to \]3, D\[\to \]1 |
| Answer» D. A\[\to \]2, B\[\to \]4, C\[\to \]3, D\[\to \]1 | |
| 1493. |
Which one of the following is not an electric resistant method of welding? |
| A. | Electro slag welding |
| B. | Percussion welding |
| C. | Seam welding |
| D. | Flash welding |
| Answer» B. Percussion welding | |
| 1494. |
Match List-I (Welding) with List-II (Application) and select the correct answer using the codes given below the Lists: List-I (Welding) List-II (Application) A. Explosive 1. Joining thick sheets B. Ultrasonic 2. Manufacture of heat exchanges C. Thermite 3. Joining thin sheets or wires of similar/dissimilar metals D. Projection 4. Joining hydraulic piston rods heat for agricultural Machinery 5. Joining rails, pipes and thick steel sections Codes: |
| A. | A\[\to \]2, B\[\to \]5, C\[\to \]1, D\[\to \]3 |
| B. | A\[\to \]4, B\[\to \]5, C\[\to \]1, D\[\to \]3 |
| C. | A\[\to \]2, B\[\to \]3, C\[\to \]5, D\[\to \]1 |
| D. | A\[\to \]4, B\[\to \]3, C\[\to \]5, D\[\to \]1 |
| Answer» D. A\[\to \]4, B\[\to \]3, C\[\to \]5, D\[\to \]1 | |
| 1495. |
Two plain carbon steel specimens having 0.8% carbon content are weld. If we observe the weldment under Metallurgical Microscope from centre towards either side, the following structures are observed at different zones: 1. Fine Pearlite 2. Coarse Pearlite 3. Martensite Select the correct sequence using the codes given below: Codes: |
| A. | 1, 2, 3 |
| B. | 1, 3, 2 |
| C. | 2, 1, 3 |
| D. | 3, 1, 2 |
| Answer» E. | |
| 1496. |
Match List-I (Welding processes) with List-II (Features) and select the correct answer using the codes given below the Lists: List-I List-II A. Ultrasonic welding 1. Gas heated to ionized condition for conduction of electric current B. Plasma arc welding 2. High frequency and high intensity vibrations C. Plasma arc welding 3. Concentrated steam of high-energy Electrons 4. Exothermal chemical reaction Codes: |
| A. | A\[\to \]1, B\[\to \]2, C\[\to \]4 |
| B. | A\[\to \]4, B\[\to \]3, C\[\to \]1 |
| C. | A\[\to \]2, B\[\to \]1, C\[\to \]4 |
| D. | A\[\to \]2, B\[\to \]3, C\[\to \]1 |
| Answer» E. | |
| 1497. |
Consider the following welding processes: 1. TIG welding 2. Submerged arc welding 3. Electro-slag welding 4. Thermit welding. Which of these welding processes are used for welding thick pieces of metals? |
| A. | 1, 2 and 3 |
| B. | 1, 2 and 4 |
| C. | 1, 3 and 4 |
| D. | 2, 3 and 4 |
| Answer» E. | |
| 1498. |
Match List-I (Shielding method) with List-II (Welding process) and select the correct answer using the codes given below the lists: List-I List-II A. Flux coating 1. Gas metal arc welding B. Flux granules 2. submerged arc welding C. \[C{{O}_{2}}\] 3. Shielded metal arc welding D. Vacuum 4. Laser beam welding 5. Electron beam welding Codes: |
| A. | A\[\to \]1, B\[\to \]2, C\[\to \]5, D\[\to \]3 |
| B. | A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]5 |
| C. | A\[\to \]3, B\[\to \]5, C\[\to \]1, D\[\to \]4 |
| D. | A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]5 |
| Answer» E. | |
| 1499. |
Open-circuit voltage of 60V and current of 160 A were the welding conditions for arc welding of a certain class of steel strip of thickness 10 mm. For arc welding of 5 mm thick strip of the same steel, the welding voltage and current would be: |
| A. | 60 V and 80 A |
| B. | 120 V and 160 A |
| C. | 60V and 40 A |
| D. | 120V and 40 A |
| Answer» B. 120 V and 160 A | |
| 1500. |
Assuming a straight line V\[-\]I characteristics for a DC welding generator, short-circuit current as 400 A and open circuit voltage as 100 V, which one of the following is the correct voltage and current setting for maximum arc power? |
| A. | 400 A and 100 V |
| B. | 200 A and 100 V |
| C. | 400 A and 50 V |
| D. | 200 A and 50 V |
| Answer» E. | |