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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.
| 2201. |
Which one of the following is heat absorbed or rejected during a polytropic process? |
| A. | \[\left( \frac{\gamma -n}{\gamma -1} \right)\times \] work done |
| B. | \[{{\left( \frac{\gamma -n}{\gamma -1} \right)}^{2}}\times \] work done |
| C. | \[{{\left( \frac{\gamma -n}{\gamma -1} \right)}^{3}}\times \] work done |
| D. | \[\left( \frac{\gamma -n}{1-n} \right)\times \]work done |
| Answer» B. \[{{\left( \frac{\gamma -n}{\gamma -1} \right)}^{2}}\times \] work done | |
| 2202. |
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. | |
| 2203. |
State of a wet vapour cannot be specified only by: |
| A. | Pressure and temperature |
| B. | Pressure and dryness fraction |
| C. | Temperature and dryness fraction |
| D. | Pressure and volume |
| Answer» B. Pressure and dryness fraction | |
| 2204. |
Pertaining to a steam boiler, which of the following statements is correct? |
| A. | Primary boiler heat transfer surface Includes evaporator section, economizer and air preheater |
| B. | Primary boiler heat transfer surface includes evaporator section, economizer and superheater section |
| C. | Secondary boiler heat transfer surface includes superheater, economizer and air preheater |
| D. | Primary boiler heat transfer surface includes evaporator section, superheater section and reheat section |
| Answer» E. | |
| 2205. |
An isentropic nozzle is discharging steam through critical pressure ratio. If the back pressure is further decreased, the discharge will: |
| A. | Decrease |
| B. | Increase |
| C. | Remain unaffected |
| D. | Come to a dead stop due to shock waves |
| Answer» D. Come to a dead stop due to shock waves | |
| 2206. |
Consider the following statements for an incompressible fluid flowing through a convergent-divergent duct: 1. The convergent part acts as a nozzle. 2. The divergent part acts as a diffuser. 3. The maximum limiting speed of the fluid is the sonic velocity. Which of these statements are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 1 and 3 only |
| Answer» C. 2 and 3 only | |
| 2207. |
Willans line represents: |
| A. | Total steam consumption vs. power output with throttle governing |
| B. | Total steam consumption vs. power output with cutoff governing |
| C. | (e) Behaviour of supersaturated steam through nozzles |
| D. | Condensation of steam while flowing through the turbine |
| Answer» B. Total steam consumption vs. power output with cutoff governing | |
| 2208. |
Consider the following pairs of parts: 1. Pair of gear in mesh 2. Belt and pulley 3. Cylinder and piston. 4. Cam and follower Among these, the higher pairs are: |
| A. | 1 and 4 |
| B. | 2 and 4 |
| C. | 1, 2 and 3 |
| D. | 1, 2 and 4 |
| Answer» E. | |
| 2209. |
Out of the following impurities generally found in water, which one requires special consideration in case of very high pressure boilers? |
| A. | Hydrogen |
| B. | Ammonia |
| C. | Silica |
| D. | Dissolved salts |
| Answer» D. Dissolved salts | |
| 2210. |
The velocity ratio in the case of the compound train of wheels is equal to: |
| A. | \[\frac{No\,\,of\,\,teeth\,\,on\,\,first\,\,drivers}{No\,\,of\,\,teeth\,\,on\,\,last\,\,follower}\] |
| B. | \[\frac{No\,\,of\,\,teeth\,\,on\,\,last\,\,follower}{No\,\,of\,\,teeth\,\,on\,\,first\,\,drivers}\] |
| C. | \[\frac{\text{Produc}t\,\,of\,\,teeth\,\,on\,\,the\,\,drivers}{\text{Product}\,\,of\,\,teeth\,\,on\,\,the\,\,follower}\] |
| D. | \[\frac{\text{Produc}t\,\,of\,\,teeth\,\,on\,\,the\,\,follower}{\text{Product}\,\,of\,\,teeth\,\,on\,\,the\,\,drivers}\] |
| Answer» D. \[\frac{\text{Produc}t\,\,of\,\,teeth\,\,on\,\,the\,\,follower}{\text{Product}\,\,of\,\,teeth\,\,on\,\,the\,\,drivers}\] | |
| 2211. |
Sensitiveness of a governor is denned as: |
| A. | \[\frac{Ranjge\,\,of\,\,speed}{2\times Mean\,\,speed}\] |
| B. | \[\frac{2\times Mean\,\,speed}{Ranjge\,\,of\,\,speed}\] |
| C. | \[Mean\,\,speed\times Ranjge\,\,of\,\,speed\] |
| D. | \[\frac{Ranjge\,\,of\,\,speed}{Mean\,\,speed}\] |
| Answer» D. \[\frac{Ranjge\,\,of\,\,speed}{Mean\,\,speed}\] | |
| 2212. |
A four-bar chain has: |
| A. | All turning pairs |
| B. | One turning pair and the others are sliding pairs |
| C. | One sliding pair and the others are turning pairs |
| D. | All sliding pairs |
| Answer» B. One turning pair and the others are sliding pairs | |
| 2213. |
A wheel is rolling on a straight level track with a uniform velocity 'v'. The instantaneous velocity of a point on the wheel lying at the mid-point of a radius: |
| A. | Varies between \[3\frac{v}{2}\] and \[-\frac{v}{2}\] |
| B. | Varies between \[\frac{v}{2}\] and \[-\frac{v}{2}\] |
| C. | Varies between 3 \[3\frac{v}{2}\] and \[-\frac{v}{2}\] |
| D. | Does not vary and is equal to v |
| Answer» C. Varies between 3 \[3\frac{v}{2}\] and \[-\frac{v}{2}\] | |
| 2214. |
A point on a link connecting a double slider crank chain-will trace a: |
| A. | Straight line |
| B. | circle |
| C. | Parabola |
| D. | ellipse |
| Answer» E. | |
| 2215. |
A rigid shaft when laid on horizontal parallel ways will not roll if the: |
| A. | Centre of gravity falls parallel to shaft axis |
| B. | Centre of gravity lies on the shaft axis |
| C. | Horizontal moments are large |
| D. | Vertical moments are large |
| Answer» C. Horizontal moments are large | |
| 2216. |
If a two-mass system is dynamically equivalent to a rigid body, then the system will not satisfy the condition that the: |
| A. | Sum of the two masses must be equal to that of the rigid body |
| B. | Polar moment of inertia of the system should be equal to that of the rigid body |
| C. | Centre of gravity (e.g.) of the system should coincide with that of the rigid body |
| D. | Total moment of inertia about the axis through e.g. must be equal to that of the rigid body |
| Answer» E. | |
| 2217. |
Consider the following speed governors: 1. Porter governor 2. Hartnell governor 3. Watt governor 4. Proell governor. The correct sequence of development of these governors is: |
| A. | 1, 3, 2, 4 |
| B. | 3, 1, 4, 2 |
| C. | 3, 1, 2, 4 |
| D. | 1, 3, 4, 2 |
| Answer» C. 3, 1, 2, 4 | |
| 2218. |
Consider the following parameters: 1. Limit of peripheral speed 2. Limit of centrifugal stress 3. Coefficient of fluctuation of speed 4. Weight of the rim Which of these parameters are used in the calculation of the diameter of flywheel rim? |
| A. | 1, 3 and 4 |
| B. | 2, 3 and 4 |
| C. | 1, 2 and 3 |
| D. | 1, 2 and 4 |
| Answer» B. 2, 3 and 4 | |
| 2219. |
In a single slider four-bar linkage, when the slider is fixed, it forms a mechanism of: |
| A. | Hand pump |
| B. | Rolling |
| C. | Quick return |
| D. | Oscillating cylinder |
| Answer» B. Rolling | |
| 2220. |
The motion transmitted between the teeth of two spur gears in mesh is generally: |
| A. | Sliding |
| B. | Rolling |
| C. | Rotary |
| D. | Partly sliding and partly rolling |
| Answer» E. | |
| 2221. |
Match List-I with List-II and select the correct answer using the codes given below the lists. List-I List-II A. Governor 1. Pantograph device B. Automobile differential 2. Feed-back control C. Dynamic Absorber 3. Epicyelic train D. Engine Indicator 4. Two-mass oscillator Codes: |
| A. | A\[\to \]1, B\[\to \]2, C\[\to \]3, D\[\to \]4 |
| B. | A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3 |
| C. | A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1 |
| D. | A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 |
| Answer» D. A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 | |
| 2222. |
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 | |
| 2223. |
Certain machine requires a torque of \[(500+50\,\sin 2\theta )\] kN.m to drive it where \[\theta \] is the angle of rotation of shaft measured from certain datum. The machine is directly coupled to an engine which produces a troque \[(500+50\,\sin \theta )\] kN.m in a cycle. How many times the value of torque of machine and engine will be identical? |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 8 |
| Answer» C. 4 | |
| 2224. |
The relative acceleration of two points which are at variable distance apart on a moving link can he determined by using the: |
| A. | Threecentres in line theorem |
| B. | Instantaneous centre of rotation method |
| C. | Coriolis component of acceleration method |
| D. | Klein's construction |
| Answer» C. Coriolis component of acceleration method | |
| 2225. |
Match List-I with List-II and select the correct answer using the codes given below the Lists: List-I List-II A. 4 links, 4 turning pair 1. Complete constraint B. 3 links, 3 turning pair 2. Successful constraint C. 5 links, 5 turning pair 3. Rigid Frame D. Footstep bearing 4. Incomplete constant Codes: |
| A. | A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]2 |
| B. | A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]4 |
| C. | A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 |
| D. | A\[\to \]1, B\[\to \]3, C\[\to \]4, D\[\to \]2 |
| Answer» E. | |
| 2226. |
In a multi-cylinder in-line internal combustion engine, even number of cylinders is chosen so that: |
| A. | Uniform firing order is obtained |
| B. | The couples are balanced |
| C. | Primary forces are balanced |
| D. | Secondary forces arc balanced |
| Answer» B. The couples are balanced | |
| 2227. |
The working surface above the pitch surface of the gear tooth is termed as: |
| A. | Addendum |
| B. | Dedendum |
| C. | Flank |
| D. | Face |
| Answer» D. Face | |
| 2228. |
In a cam drive, it is essential to offset the axis of a follower to: |
| A. | Decrease the side thrust between the follower and guide |
| B. | Decrease the wear between follower and cam surface |
| C. | Take care of space limitation |
| D. | Reduce the cost |
| Answer» C. Take care of space limitation | |
| 2229. |
Two links OA and OB are connected by a pin joint at 'O'. The link OA turns with angular velocity \[{{\omega }_{1}}\] radians per second in the clockwise direction and the link OB turns with angular velocity \[{{\omega }_{2}}\] radians per second in the anticlockwise direction. If the radius of the pin at 'O' is 'r' then the rubbing velocity at the pin joint 'O' will be: |
| A. | \[{{\omega }_{1}}.{{\omega }_{2}}.r\] |
| B. | \[({{\omega }_{1}}-{{\omega }_{2}})r\] |
| C. | \[({{\omega }_{1}}+{{\omega }_{2}})r\] |
| D. | \[({{\omega }_{1}}+{{\omega }_{2}})2r\] |
| Answer» D. \[({{\omega }_{1}}+{{\omega }_{2}})2r\] | |
| 2230. |
..Which of the following pair (s) is/are correctly matched? I. Four-bar chain ....Oscillating-oscillating converter II. Inertia governor ...Rate of change of engine speed III. Hammer blow ?Reciprocating unbalance Select the correct answer using the codes given below |
| A. | I alone |
| B. | I, II and III |
| C. | II and III |
| D. | I and III |
| Answer» D. I and III | |
| 2231. |
Two geared shafts A and B having moments of inertia \[{{l}_{a}}\] and \[{{l}_{b}}\] angular acceleration \[{{\alpha }_{a}}\] and \[{{\alpha }_{b}}\] respectively arc meshed together. B rotates at G time the speed or A. If the gearing efficiency of the shafts is n, then is order to accelerate B, the to which must be applied to A will be: |
| A. | \[{{I}_{a}}{{\alpha }_{a}}+{{G}^{2}}{{I}_{b}}\frac{{{\alpha }_{a}}}{\eta }\] |
| B. | \[{{G}^{2}}{{I}_{a}}\frac{{{\alpha }_{b}}}{\eta }\] |
| C. | \[{{G}^{2}}{{I}_{a}}\frac{{{\alpha }_{a}}}{\eta }\] |
| D. | \[{{G}^{2}}{{I}_{b}}\frac{{{\alpha }_{b}}}{\eta }\] |
| Answer» B. \[{{G}^{2}}{{I}_{a}}\frac{{{\alpha }_{b}}}{\eta }\] | |
| 2232. |
If \[\mu \] is the actual coefficient of friction in a belt moving in grooved pulley, the groove angle being \[2\alpha ,\] the virtual coefficient of friction will be: |
| A. | \[\frac{\mu }{\sin \alpha }\] |
| B. | \[\frac{\mu }{\cos \alpha }\] |
| C. | \[\mu \sin \alpha \] |
| D. | \[\mu \cos \alpha \] |
| Answer» B. \[\frac{\mu }{\cos \alpha }\] | |
| 2233. |
In the case of an involute toothed gear, involute starts |
| A. | Addendum circle |
| B. | dedundum circle |
| C. | Pitch circle |
| D. | base circle |
| Answer» E. | |
| 2234. |
Match List-I (positioning of two shafts) with List-II (possible connection) and select the correct answer using the codes given below the Lists: List-I List-II A. Parallel shafts with slight offset 1. Hooke's joint B. Parallel shafts at a reasonable distance 2. Worm and wheel C. Perpendicular shafts 3. Oldham coupling D. Intersecting shafts 4. Belt and pulley Codes: |
| A. | A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 |
| B. | A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 |
| C. | A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 |
| D. | A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 |
| Answer» B. A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 | |
| 2235. |
What is the correct sequence of the following steps in engine analysis? 1. Vibration analysis 2. Inertia force analysis 3. Balancing analysis 4. Velocity and Acceleration analysis Select the correct answer using the codes given below: |
| A. | 2, 4, 1, 3 |
| B. | 2, 4, 3, 1 |
| C. | 4, 2, 1, 3 |
| D. | 4, 2, 3, 1 |
| Answer» D. 4, 2, 3, 1 | |
| 2236. |
Which of the following statements regarding laws governing the friction between dry surfaces are correct? 1. The friction force is dependent on the velocity of sliding. 2. The friction force is directly proportional to the normal force. 3. The friction force is dependent on the materials of the contact surfaces. 4. The friction force is dependent on the area of contact surfaces. |
| A. | 2, 3 and 4 |
| B. | 1 and 3 |
| C. | 2 and 4 |
| D. | 1, 2, 3 and 4 |
| Answer» E. | |
| 2237. |
The centre of gravity of the coupler link in a 4-bar mechanism would experience: |
| A. | No acceleration |
| B. | Only linear acceleration |
| C. | Only angular acceleration |
| D. | Both linear and angular accelerations |
| Answer» E. | |
| 2238. |
Which of the following statements hold good for a multi-collar thrust bearing carrying an axial dlW unit? 1. Friction moment is independent of the number of collars. 2. The intensity of pressure is affected by the number of collars. 3. Coefficient of friction of the bearing surface is affected by the number of collars. |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 1, 2 and 3 |
| Answer» B. 1 and 3 | |
| 2239. |
The instantaneous centre of rotation of a rigid thin disc rolling on a plane rigid surface is located at: |
| A. | The centre of the disc |
| B. | An infinite distance on the plane surface |
| C. | The point of contact |
| D. | The point on the circumference situated vertically opposite to the contact point |
| Answer» D. The point on the circumference situated vertically opposite to the contact point | |
| 2240. |
Consider the following statements regarding the differential of an automobile: 1. The speed of the crown wheel will always be the mean of the speeds of the two road wheels. 2. The road wheel speeds are independent of the number of teeth on the planets. 3. The difference between the speed of the road wheels depends on the number of teeth on the planets. 4. The ratio of speeds of the road wheels depends upon the number of teeth on the gear wheels attached to them and on the crown wheel. Of these statements: |
| A. | 1 and 2 are correct |
| B. | 3 and 4 are correct |
| C. | 1 and 3 are correct |
| D. | 2 and 4 are correct |
| Answer» E. | |
| 2241. |
Consider the following statements regarding a high speed in-line engine with identical reciprocating parts with cranks spaced to give equal firing intervals: 1. All harmonic farces, except those which are multiples of half the number of cylinders, are balanced. 2. Couples are balanced if the engine is symmetrical about a plane normal to the axis of the cranks shaft. 3. In a four cylinder in-line engine, second and fourth harmonic forces are unbalanced whereas in a six cylinder in-line engine, second fourth and sixth harmonic forces are unbalanced. Of these statements: |
| A. | 1, 2 and 3 are correct |
| B. | 1 and 3 are correct |
| C. | 1 and 2 are correct |
| D. | 2 and 3 are correct |
| Answer» B. 1 and 3 are correct | |
| 2242. |
Inversion of a mechanism is: |
| A. | Changing of a higher pair to lower pair |
| B. | Obtained by fixing different links in a kinematic chain |
| C. | Turning it upside down |
| D. | Obtained by reversing the input and output motion |
| Answer» C. Turning it upside down | |
| 2243. |
In full depth \[14\frac{1}{2}\] degree involute system, the smallest number of teeth in a pinion which meshes with rack without interference is: |
| A. | 12 |
| B. | 16 |
| C. | 25 |
| D. | 32 |
| Answer» E. | |
| 2244. |
Scotch yoke mechanism is used to generate: |
| A. | Sine functions |
| B. | square roots |
| C. | Logarithms |
| D. | inversions |
| Answer» B. square roots | |
| 2245. |
In a circular arc cam with roller follower, the acceleration in any position of the lift would depend only upon: |
| A. | Total lift, total angle of lift, minimum radius of cam and cam speed |
| B. | Radius of circular arc cam, speed, location of centre of circular arc and roller diameter |
| C. | Weight of cam follower linkage, spring stiffness and cam speed |
| D. | Total lift, centre of gravity of the cam and cam speed |
| Answer» C. Weight of cam follower linkage, spring stiffness and cam speed | |
| 2246. |
An electric lift is moving downwards with an acceleration of \[\frac{g}{3}.\] The vertical force between a passenger in the lift and its floor is equal to: |
| A. | \[\frac{2}{3}\] of the passenger's weight |
| B. | \[\frac{3}{4}\] of the passenger's weight |
| C. | Passenger's weight |
| D. | \[\frac{4}{3}\] of the passenger's weight |
| Answer» B. \[\frac{3}{4}\] of the passenger's weight | |
| 2247. |
A thin circular disc-is rolling with a uniform linear speed along a straight path on a plane surface. Consider the following statements in this regard: 1. All points of the disc have the same velocity. 2. The centre of the disc has zero acceleration. 3. The centre of the disc has centrifugal acceleration. 4. The point on the disc making contact with the plane surface has zero acceleration. Of these statements: |
| A. | 1 and 4 are correct |
| B. | 3 and 4 are correct |
| C. | 3 alone is correct |
| D. | 2 is alone is correct |
| Answer» E. | |
| 2248. |
Reheat between multi-stage expansions Joule cycle increases 1. Overall work output 2. The work ratio 3. The thermal efficiency Which of the above are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 1 and 3 only |
| Answer» C. 2 and 3 only | |
| 2249. |
In which modification of simple gas turbine cycle, is work ratio increased? 1. Regenerative gas turbine cycle 2. Gas turbine cycle with reheating |
| A. | Both 1 and 2 |
| B. | 1 only |
| C. | 2 only |
| D. | Neither 1 only 2 |
| Answer» D. Neither 1 only 2 | |
| 2250. |
The function of economizer in a boiler is to: |
| A. | Superheat the steam |
| B. | Reduce fuel consumption |
| C. | Increase steam pressure |
| D. | Maintain saturation temperature |
| Answer» C. Increase steam pressure | |