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.
| 351. |
Match List-I with List-II and select the correct answer using the codes given below the lists: List-I (End conditions of columns) List-II (Lowest critical load) A. Column with both ends hinged 1. \[({{\pi }^{2}}El)/{{L}^{2}}\] B. Column with both ends fixed 2. \[(2{{\pi }^{2}}El)/{{L}^{2}}\] C. Column with one end fixed and the other end hinged 3. \[({{\pi }^{2}}El)/{{L}^{2}}\] D. Column with one end fixed and the other end free 4. \[({{\pi }^{2}}El)/4{{L}^{2}}\] (E is the young's modulus of elasticity of column material, L is the length and I is the second moment of area of cross-section of the column). Codes: |
| A. | A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4 |
| B. | A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 |
| C. | A\[\to \]1, B\[\to \]3, C\[\to \]2, 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 | |
| 352. |
A 3-meter long steel cylindrical shaft is rigidly held at its two ends. A pulley is mounted on the shaft at 1 meter from one end; the shaft is twisted by applying torque on the pulley. The maximum shearing stresses developed in 1m and 2m lengths are respectively \[{{\tau }_{1}}\] and \[{{\tau }_{2}}.\]the ratio \[{{\tau }_{2}},{{\tau }_{1}}\] is: |
| A. | 1/2 |
| B. | 1 |
| C. | 2 |
| D. | 4 |
| Answer» B. 1 | |
| 353. |
The total number of instantaneous centres for a mechanism consisting of 'n' links is: |
| A. | \[\frac{n}{2}\] |
| B. | \[n\] |
| C. | \[\frac{n-1}{2}\] |
| D. | \[\frac{n(n-1)}{2}\] |
| Answer» E. | |
| 354. |
Which of the following stresses are associated with the tightening of nut on a bolt? (1) Tensile stress due to the stretching of bolt (2) Bending stress due to the bending of bolt (3) Crushing and shear stresses in threads (4) Torsional shear stress due to frictional resistance between the nut and the bolt. Select the correct answer using the codes given below: |
| A. | 1, 2 and 4 |
| B. | 1, 2 and 3 |
| C. | 2, 3 and 4 |
| D. | 1, 3 and 4 |
| Answer» E. | |
| 355. |
A Long slender bar having uniform rectangular cross- action \['B\times H'\] is acted upon by an axial compressive force. The sides B and H are paralled to x-and y-axes respectively. The ends of the bar are fixed such that they behave as pinpointed when the bar buckles in a plane normal to x-axis, and they behave as built-in when the bar buckles in a plane normal to y-axis. If load capacity in either mode of buckling is same, then the value of \[\frac{H}{B}\] will be B: |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 16 |
| Answer» B. 4 | |
| 356. |
Ratio of specific heats for an ideal gas is given by: (Symbols have the usual meanings) |
| A. | \[\frac{1}{1-\frac{R}{{{c}_{p}}}}\] |
| B. | \[\frac{1}{1-\frac{{{c}_{p}}}{R}}\] |
| C. | \[\frac{1}{1+\frac{{{c}_{p}}}{R}}\] |
| D. | \[\frac{1}{1+\frac{R}{{{c}_{p}}}}\] |
| Answer» B. \[\frac{1}{1-\frac{{{c}_{p}}}{R}}\] | |
| 357. |
The Gibbs free-energy function is a property comprising: |
| A. | Pressure, volume and temperature |
| B. | Enthalpy, temperature and entropy |
| C. | Temperature, pressure and enthalpy |
| D. | Volume, enthalpy and entropy |
| Answer» C. Temperature, pressure and enthalpy | |
| 358. |
An electric motor of 5 kW is subjected to a braking test for 1 hour. The heat generated by the frictional forces in the process is transferred to the surroundings \[20{}^\circ C.\] The resulting entropy change will be: |
| A. | 22.1 kJ/K |
| B. | 30.2 kJ/K |
| C. | 61.4 kJ/K |
| D. | 82.1 kJ/K |
| Answer» D. 82.1 kJ/K | |
| 359. |
Fresh air intake (air change per hour) recommended for ventilation purposes in the air conditioning system of an office building is: |
| A. | 1/2 |
| B. | 44230 |
| C. | 9/2 |
| D. | 44252 |
| Answer» D. 44252 | |
| 360. |
Consider the following statements: (1) The Second Law analysis can be applied to thermodynamic cycles only and not to individual processes. (2) The Second Law analysis clearly gives an idea about the irreversibilities in the heat exchangers whereas no idea is obtained from the First Law analysis. Which of the statements given above is/are correct? |
| A. | 1 only |
| B. | 2 only |
| C. | Both 1 and 2 |
| D. | neither 1 nor 2 |
| Answer» D. neither 1 nor 2 | |
| 361. |
A compound cylinder with inner radius 5 cm and outer radius 7 cm is made by shrinking one cylinder on to the other cylinder. The junction radius is 6 cm and the junction pressure is \[11\,kg/c{{m}^{2}}.\] The maximum hoop stress developed in the inner cylinder is: |
| A. | \[36\,\text{kgf/c}{{\text{m}}^{\text{2}}}\] Compression |
| B. | \[36\,\text{kgf/c}{{\text{m}}^{\text{2}}}\] Tension |
| C. | \[72\,\text{kgf/c}{{\text{m}}^{\text{2}}}\] Compression |
| D. | \[72\,\text{kgf/c}{{\text{m}}^{\text{2}}}\]Tension |
| Answer» D. \[72\,\text{kgf/c}{{\text{m}}^{\text{2}}}\]Tension | |
| 362. |
A locomotive exerts a tractive effort of 40,000 N in pulling a rain at 60 kmph on a level track. If the same train is to be mauled at the same speed but on gradient, the tractive effort required will be 60,000 N. The output delivered by the motor will be more if it is driven by |
| A. | a 3 -phase induction motor |
| B. | a dc series motor |
| C. | an ac series motor |
| D. | equal in all the three cases |
| Answer» B. a dc series motor | |
| 363. |
Match the following \[14\frac{1}{2}\] degree composite system of gears List-I List-II A. Dedendum 1. \[\frac{2}{P}\] B. Clearance 2. \[\frac{0.157}{P}\] C. Working depth 3. \[\frac{1.157}{P}\] D. Addendum 4. \[\frac{1}{P}\] Codes: |
| A. | A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4 |
| B. | A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 |
| C. | A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 |
| D. | A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 |
| Answer» D. A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 | |
| 364. |
Which of the following are inversions of a double slider crank chain? 1. Whitworth return motion. 2. Scotch Yoke, 3. Oldham's Coupling. 4. Rotary engine. Select correct answer using the codes given below: Codes: |
| A. | 1 and 2 |
| B. | 1, 3 and 4 |
| C. | 2 and 3 |
| D. | 2, 3 and 4 |
| Answer» D. 2, 3 and 4 | |
| 365. |
How the Von-Karman momentum integral equation expressed is (\[\theta \] is momentum thickness)? |
| A. | \[\frac{{{\tau }_{0}}}{\frac{1}{2}\,\rho \,U_{\infty }^{2}}=\frac{\partial \theta }{\partial x}\] |
| B. | \[\frac{{{\tau }_{0}}}{2\,\rho \,U_{\infty }^{2}}=\frac{\partial \theta }{\partial x}\] |
| C. | \[\frac{{{\tau }_{0}}}{\rho \,U_{\infty }^{2}}=\frac{\partial \theta }{\partial x}\] |
| D. | \[\frac{{{\tau }_{0}}}{\frac{1}{3}\,\rho \,U_{\infty }^{2}}=\frac{\partial \theta }{\partial x}\] |
| Answer» D. \[\frac{{{\tau }_{0}}}{\frac{1}{3}\,\rho \,U_{\infty }^{2}}=\frac{\partial \theta }{\partial x}\] | |
| 366. |
In a locomotive boiler, the draught is produced by: |
| A. | Chimney |
| B. | ID fan |
| C. | FD fan |
| D. | Steam jet |
| Answer» E. | |
| 367. |
Consider the following statements regarding boundary lubrication conditions in hydrodynamic journal hearings: 1. It is an undesirable condition. 2. It always occurs during starting and stopping of the journal. 3. It necessitates frequent repair of the journal. 4. This condition can he completely eliminated by using high viscosity lubricant. Which of the statements given above are correct? |
| A. | 1, 2 and 4 |
| B. | 2, 3 and 4 |
| C. | 1 and 2 |
| D. | 3 and 4 |
| Answer» B. 2, 3 and 4 | |
| 368. |
Ericsson cycle consists of the following four processes |
| A. | two isothermals and two isentropics |
| B. | two isothermals and two constant volumes |
| C. | two isothermals and two constant pressures |
| D. | two adiabatics and two constant pressures |
| Answer» D. two adiabatics and two constant pressures | |
| 369. |
In steam turbine terminology, diaphragm refers to: |
| A. | Separating wall between rotors carrying nozzles |
| B. | The ring of guide blades between rotors |
| C. | A partition between low and high pressure dies |
| D. | The flange connecting the turbine exit to the condenser |
| Answer» B. The ring of guide blades between rotors | |
| 370. |
If in case of disc clutch,\[{{N}_{1}}\]= Number of discs on driving shaft \[{{N}_{2}}\]= Number of discs on driving shaft then, number of pairs of contact surfaces will be: |
| A. | \[{{N}_{1}}-{{N}_{2}}+1\] |
| B. | \[{{N}_{1}}-{{N}_{2}}-1\] |
| C. | \[{{N}_{1}}+{{N}_{2}}+1\] |
| D. | \[{{N}_{1}}+{{N}_{2}}-1\] |
| Answer» E. | |
| 371. |
Consider the following statements: State of stress in two dimensions at a point in a component can be completely specified by indicating the normal and shear stresses on 1. A plane containing the point 2. Any two planes passing through the point 3. Two mutually perpendicular planes passing through the point Of these statements |
| A. | 1 and 3 are correct |
| B. | 2 alone is correct |
| C. | 1 alone is correct |
| D. | 3 alone is correct |
| Answer» E. | |
| 372. |
The state of plane stress at a point is described by \[{{\sigma }_{x}}={{\sigma }_{y}}\] and \[{{\tau }_{xy}}=0.\] The normal stress on the plane inclined at \[45{}^\circ \] to the x-plane will be |
| A. | \[\sigma \] |
| B. | \[\sqrt{2\sigma }\] |
| C. | \[\sqrt{3\sigma }\] |
| D. | \[2\sigma \] |
| Answer» B. \[\sqrt{2\sigma }\] | |
| 373. |
The sensitivity of an isochronous governor is: |
| A. | Zero |
| B. | one |
| C. | Two |
| D. | infinity |
| Answer» B. one | |
| 374. |
When the primary direct crank of a reciprocating engine is positioned at \[30{}^\circ \] clockwise, the secondary reverse crank for balancing will be at: |
| A. | \[30{}^\circ \]anticlockwise |
| B. | \[60{}^\circ \]anticlockwise |
| C. | \[30{}^\circ \]clockwise |
| D. | \[60{}^\circ \]clockwise |
| Answer» E. | |
| 375. |
Match List-I with List-II and select the correct answer using the codes given below the Lists: List-I List-II A. Flywheel 1. Dunkerley Method B. Flywheel 2. Turning Moment C. Governor 3. d' Alembert's Principle D. Inertia Force 4. Speed control on bar with load Codes: |
| A. | A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]1 |
| B. | A\[\to \]4, B\[\to \]2, C\[\to \]1, D\[\to \]3 |
| C. | A\[\to \]2, B\[\to \]4, C\[\to \]3, D\[\to \]1 |
| D. | A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]3 |
| Answer» E. | |
| 376. |
Consider the following characteristics of production jobs; 1. Processing of parts frequently in small lots 2. Need to accommodate design changes of products 3. Low rate of metal removal 4. Need for holding close tolerances The characteristics which favour the choice of numerically controlled machines would include: |
| A. | 1, 2 and 3 |
| B. | 2, 3 and 4 |
| C. | 1, 3 and 4 |
| D. | 1, 2 and 4 |
| Answer» E. | |
| 377. |
Which one of the following can completely balance several masses revolving in different planes on a shaft? |
| A. | A single mass in one of the planes of the revolving masses |
| B. | A single mass in a different plane |
| C. | Two masses in any two planes |
| D. | Two equal .masses in-any two planes |
| Answer» B. A single mass in a different plane | |
| 378. |
If 'n' variables in a physical phenomenon contained 'm' fundamental dimensions, then the variables can be arranged into: |
| A. | N dimensionless terms |
| B. | M dimensionless terms |
| C. | \[(n-m)\] Dimensionless terms |
| D. | (n + m) dimensionless terms |
| Answer» D. (n + m) dimensionless terms | |
| 379. |
Which one of the following subroutines does, a computer implementations liner programming by the simplex method use? |
| A. | Finding a root of a polynomial |
| B. | Finding the determinant of a matrix |
| C. | Finding the Eigen values of matrix |
| D. | Solving a system of linear equations |
| Answer» E. | |
| 380. |
Consider the following statements: 1. A linear problem with three variables and two constraints can be solved by graphical method 2. For solutions of a linear programming problem with mixed constraints, Big-M-method can be employed 3. In the solutions process of a linear programming problem using Big-M-method which an artificial variable leaves the basis, the column of the artificial-variable can be removed from all subsequent tables. Which of these statements are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 |
| C. | 1 and 3 |
| D. | 2 and 3 |
| Answer» E. | |
| 381. |
In a forced vibrations with viscous damping, maximum amplitude occurs when the forced frequency is: |
| A. | Equal to natural frequency |
| B. | Slightly less than natural frequency |
| C. | Slightly greater than natural frequency |
| D. | Zero. |
| Answer» C. Slightly greater than natural frequency | |
| 382. |
A system undergoes a change of state during which 100 kJ of heat is transferred to it and it does 50 kJ of work. The system is brought back to its original state through a process during which 120 kJ of heat is transferred to it. What is the work done by the system? |
| A. | 50 kJ |
| B. | 70 kJ |
| C. | 120 kJ |
| D. | 170 kJ |
| Answer» E. | |
| 383. |
In gas welding, the gases used are |
| A. | oxygen and nitrogen |
| B. | argon and helium |
| C. | helium and carbon dioxide |
| D. | acetylene and oxygen |
| Answer» E. | |
| 384. |
A horizontal beam is carrying uniformly distributed load supported with equal overhangs as shown in the given figure The resultant bending moment at the mid-span shall be zero if a/b is: |
| A. | 3/4 |
| B. | 44257 |
| C. | 1/2 |
| D. | 44256 |
| Answer» D. 44256 | |
| 385. |
Two spheres A and B of same material have radii 1 m and 4 m and temperature 4000 K and 2000 K respectively. Which one of the following statements is correct? The energy radiated by sphere A is: |
| A. | Greater than that of sphere B |
| B. | Less than that of sphere B |
| C. | Equal to that of sphere B |
| D. | Equal to double that of sphere B |
| Answer» D. Equal to double that of sphere B | |
| 386. |
For a real thermodynamic cycle: |
| A. | \[\oint{\frac{dQ}{T}}>but<\infty \] |
| B. | \[\oint{\frac{dQ}{T}}<0\] |
| C. | \[\oint{\frac{dQ}{T}}=0\] |
| D. | \[\oint{\frac{dQ}{T}}=\infty \] |
| Answer» D. \[\oint{\frac{dQ}{T}}=\infty \] | |
| 387. |
Match List-I with List-II and select the correct answer using the codes given below the Lists: List-I List-II A. Quick return mechanism 1. Lathe B. Apron mechanism 2. Milling machine C. Indexing mechanism 3. Shaper D. Regulating wheel 4. Centre less grinding Codes: |
| A. | A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 |
| B. | A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1 |
| C. | A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]1 |
| D. | A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 |
| Answer» E. | |
| 388. |
If Q = Heat content of a gas, u = Internal energy P = Pressure, V = Volume, T = Temperature then which of the following statement is applicable to perfect gas and is also true for an irreversible process? |
| A. | \[dQ=dU+qdV\] |
| B. | \[Tds=dU+PdV\] |
| C. | \[dQ=Tds\] |
| D. | \[dQ=Tds+dU\] |
| Answer» C. \[dQ=Tds\] | |
| 389. |
Consider the following statements about anti- friction bearings: 1. They have low starting and low running friction at moderate speeds 2. They have high resistance to shock loading. 3. They can carry both radial and thrust loads. 4. Their initial cost is high. 5. They can accommodated some amount of misalignment of shaft. Of these statements: |
| A. | 1, 2, 3 and 4 |
| B. | 1, 3 and 4 are correct |
| C. | 1, 4 and 5 are correct |
| D. | 1, 2, 3 and 5 are correct |
| Answer» D. 1, 2, 3 and 5 are correct | |
| 390. |
In vapour compression plant, if certain temperature differences are to be maintained in the evaporator and condenser in order to obtain the necessary heat transfer, then the evaporator saturation temperature must be: |
| A. | Higher than the derived cold-region temperature and the condenser saturation temperature must be lower than the available cooling water temperature by sufficient amounts |
| B. | Low than the derived cold-region temperature and the condenser saturation temperature must be lower than the available cooling water temperature by sufficient amounts |
| C. | Lower than the derived cold-region temperature and the condenser saturation temperature must be higher than the available cooling water temperature by sufficient amounts |
| D. | Higher than the derived cold-region temperature and the condenser saturation temperature must he higher than the available cooling water temperature by sufficient amounts. |
| Answer» D. Higher than the derived cold-region temperature and the condenser saturation temperature must he higher than the available cooling water temperature by sufficient amounts. | |
| 391. |
Select the proper sequence 1. Proportional Limit 2. Elastic limit 3. Yielding 4. Failure |
| A. | 2, 3, 1, 4 |
| B. | 2, 1, 3, 4 |
| C. | 1, 3, 2, 4 |
| D. | 1, 2, 3, 4 |
| Answer» E. | |
| 392. |
A helical spring has N turns of coil of diameter D, and a second spring, made of same wire diameter and of same material, has N/2 turns of coil of diameter 2D. If the stiffness of the first spring is k, then the stiffness of the second spring will be: |
| A. | k/4 |
| B. | k/2 |
| C. | 2k |
| D. | 4k |
| Answer» B. k/2 | |
| 393. |
Circumferential and longitudinal strains in cylindrical boiler under internal steam pressure, are \[{{\varepsilon }_{1}}\] and \[{{\varepsilon }_{2}}\] respectively. Change in volume of the boiler cylinder per unit volume will be: |
| A. | \[{{\varepsilon }_{1}}+2{{\varepsilon }_{2}}\] |
| B. | \[{{\varepsilon }_{1}}+{{\varepsilon }_{2}}^{2}\] |
| C. | \[2{{\varepsilon }_{1}}+{{\varepsilon }_{2}}\] |
| D. | \[{{\varepsilon }_{1}}^{2}+{{\varepsilon }_{2}}\] |
| Answer» D. \[{{\varepsilon }_{1}}^{2}+{{\varepsilon }_{2}}\] | |
| 394. |
Feed gear box for a screw cutting is designed on the basis of: |
| A. | Geometric progression |
| B. | Arithmetic progression |
| C. | Harmonic progression |
| D. | None |
| Answer» B. Arithmetic progression | |
| 395. |
Triple point temperature of water is: |
| A. | 2 73 K |
| B. | 273.14 K |
| C. | 273.15 K |
| D. | 273.16 K. |
| Answer» E. | |
| 396. |
A new temperature scale in degrees N is to be defined. The boiling and freezing points of water on this scale are \[400{}^\circ N\] and \[100{}^\circ N\] respectively. What will be the reading on new scale corresponding to \[60{}^\circ C?\] |
| A. | \[110{}^\circ N\] |
| B. | \[180{}^\circ N\] |
| C. | \[210{}^\circ N\] |
| D. | \[280{}^\circ N\] |
| Answer» E. | |
| 397. |
Which of the following thermodynamic properties relate to the Clausius-Clapeyron equation? 1. Pressure 2. Temperature 3. Entropy 4. Specific volume 5. Enthalpy 6. Internal energy Select the correct answer using the code given below: |
| A. | 1, 2, 6, 5 |
| B. | 4, 2, 3, 5 |
| C. | 6, 4, 1 |
| D. | 4, 5, 2, 1 |
| Answer» E. | |
| 398. |
D.C. supply can be obtained from A. C. supply by the use of |
| A. | motor generator set |
| B. | mercury arc rectifier |
| C. | silicon diodes |
| D. | all of these |
| Answer» E. | |
| 399. |
If an axial flow compressor is designed for a constant velocity through all stages, then the area of annulus of the succeeding stages will: |
| A. | Remain the same |
| B. | Progressively decrease |
| C. | Progressively increase |
| D. | Depend upon the number of stages. |
| Answer» B. Progressively decrease | |
| 400. |
In a gas turbine cycle with two stages of rehearing. working between maximum pressure \[{{p}_{1}}\] and minimum pressure \[{{p}_{4}},\] the optimum reheat pressure would be: |
| A. | \[{{({{p}_{1}}{{p}_{4}})}^{1/3}}\] and \[{{({{p}_{1}}{{p}_{2}})}^{2/3}}\] |
| B. | \[{{(p_{1}^{2}{{p}_{4}})}^{2/3}}\] and \[{{({{p}_{1}}p_{4}^{2})}^{1/2}}\] |
| C. | \[\sqrt{{{p}_{1}}{{p}_{4}}}\] and \[{{p}_{1}}\sqrt{{{p}_{4}}}\] |
| D. | \[{{({{p}_{1}}{{p}_{4}})}^{1/2}}\] and \[{{({{p}_{1}}{{p}_{4}})}^{2/3}}\] |
| Answer» B. \[{{(p_{1}^{2}{{p}_{4}})}^{2/3}}\] and \[{{({{p}_{1}}p_{4}^{2})}^{1/2}}\] | |