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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.
| 2101. |
Consider the following statements: The typical air velocities in the ducts of air- conditioning systems are: 1. Lower in residential buildings as compared to those of public buildings 2. higher in residential buildings as compared to those of public buildings 3. Higher in industrial buildings has compared to those of public buildings 4. Equal in all types of buildings Which of these statements is/are correct? |
| A. | 1 alone |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 4 alone |
| Answer» C. 2 and 3 | |
| 2102. |
In a parallel flow gas turbine recuperator, the maximum effectiveness is: |
| A. | 1 |
| B. | 0.75 |
| C. | 0.5 |
| D. | between 25% and 45% |
| Answer» D. between 25% and 45% | |
| 2103. |
Optimum pressure ratio for maximum specific output for ideal gas turbine plant operating at initial temperature of 300 K and maximum temperature of 1000 K is closer to: |
| A. | 4 |
| B. | 8 |
| C. | 12 |
| D. | 16 |
| Answer» C. 12 | |
| 2104. |
A strip is to rolled from a thickness of 30 mm to 15 mm using a two-high mill having rolls of diameter 300 mm. The coefficient of friction for unaided bite should nearly be: |
| A. | 0.95 |
| B. | 0.5 |
| C. | 0.25 |
| D. | 0.07 |
| Answer» B. 0.5 | |
| 2105. |
Which of the following are the guidelines for the construction of a network diagram? 1. Each activity is represented by one and only one arrow in the network 2. Two activities can be identified by the same beginning and end events 3. Dangling must be avoided in a network diagram 4. Dummy activity consumes no time or resource. Select the correct answer using the codes given below: |
| A. | 1, 2 and 3 |
| B. | 1, 3 and 4 |
| C. | 1, 2 and 4 |
| D. | 2, 3 and 4 |
| Answer» C. 1, 2 and 4 | |
| 2106. |
If the arrival rate of units is X and the service rate is u for a waiting line system having 'm' number of service stations, then the probability of services unit being turned out in the time interval, \[(t+\nabla t):\] |
| A. | Zero |
| B. | \[\mu .\nabla .t\] |
| C. | \[m\,\mu .\nabla .t\] |
| D. | \[n\,\mu .\nabla t\] |
| Answer» C. \[m\,\mu .\nabla .t\] | |
| 2107. |
In CPM the cost slope is determined by: |
| A. | \[\frac{Crash\,\,\text{cost}}{Normal\,\,\text{cost}}\] |
| B. | \[\frac{Crash\,\,\text{cost}-\text{Normal}\,\,\text{cost }}{Normal\,\,time-crash\,\,time}\] |
| C. | \[\frac{\text{Normal}\,\,\text{cost }}{Crash\,\,time}\] |
| D. | \[\frac{\text{Normal}\,\,\text{cost}-Crash\,\,\cos t\text{ }}{\text{Normal}\,\,time-crash\,\,time}\] |
| Answer» C. \[\frac{\text{Normal}\,\,\text{cost }}{Crash\,\,time}\] | |
| 2108. |
For the PERT network shown in the given figure, the probability of completing the project in 27 days is? |
| A. | 0.841 |
| B. | 0.919 |
| C. | 0,964 |
| D. | 0.977 |
| Answer» B. 0.919 | |
| 2109. |
In a connected network of 'n 'arcs (roads) joining 'm' verticals (towns), a selection of roads is taken up for resurfacing based on a minimum spanning tree of the network as being the least cost solution. This spanning tree will contain: |
| A. | m arcs |
| B. | (m + 1) arcs |
| C. | \[(m\,-1)\] arcs |
| D. | \[(m+n-1)\] arcs |
| Answer» C. \[(m\,-1)\] arcs | |
| 2110. |
The software package used for computer simulation is known as: |
| A. | GPSS |
| B. | HTPM |
| C. | CRAFT |
| D. | COMSOAL |
| Answer» C. CRAFT | |
| 2111. |
A PERT network has three activities on critical path with mean time 3, 8 and 6, and standard deviation 1, 2 and 3 respectively. The probability that the project will be completed in 20 days is: |
| A. | 0.5 |
| B. | 0.79 |
| C. | 0.84 |
| D. | 0.95 |
| Answer» C. 0.84 | |
| 2112. |
Which of the following assumptions are correct for cold rolling? (1) The material is plastic (2) The arc of contact is circular with a radius greater than the radius of the roil. (3) Coefficient of friction is constant over the arc of contact and acts in one direction throughout the arc of contact. Select the correct answer using the code given below: Codes: |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 2, 2 and 3 |
| Answer» E. | |
| 2113. |
Consider the following statements: 1. An optimum solution. 2. An initial feasible solution. 3. Vogel's approximate solution. Of these statements: |
| A. | 1 alone is correct |
| B. | Alone is 2 correct |
| C. | 3 alone is correct |
| D. | 2 and 3 are correct |
| Answer» C. 3 alone is correct | |
| 2114. |
Dummy activities are used to: |
| A. | Determine critical path |
| B. | Determine project completion time |
| C. | Maintain the required flow in a network |
| D. | Facilitate computations of stack |
| Answer» D. Facilitate computations of stack | |
| 2115. |
Which of the following conditions are necessary of applying linear programming 1. There must be a well defined objective function 2. The decision variables should be interrelated and non-negative 3. The resources must be in limited supply. |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» E. | |
| 2116. |
In a point-to-point type of NC system: |
| A. | Control of position and velocity of the tool is essential |
| B. | Control of only position of the tool is sufficient |
| C. | Control of only velocity of the tool is sufficient |
| D. | Neither position nor velocity need be controlled |
| Answer» C. Control of only velocity of the tool is sufficient | |
| 2117. |
In an NC machining operation, the tool has to be moved from point (5, 4) to point (7, 2) along a circular path with centre at (5, 2). Befoit starting the operation, the tool is at (5, 4). The correct G and M code for this motion is: |
| A. | N010 G03 X 7.0 Y2.0 15.0 J2.0 |
| B. | N010 G02 X 7.0 Y2.0 15.0 J2.0 |
| C. | N010 G01 X 7.0 Y2.0 15.0 J2.0 |
| D. | N010 G00 X 7.0 Y2.0 15.0 J2.0 |
| Answer» C. N010 G01 X 7.0 Y2.0 15.0 J2.0 | |
| 2118. |
With reference to NC machines, which of the following statements is wrong: |
| A. | Both closed-loop and open-loop control systems are used |
| B. | Paper tapes, floppy tapes and cassettes are used for data storage |
| C. | Digitizers may be used as interactive input devices |
| D. | Post processor is an item of hardware |
| Answer» E. | |
| 2119. |
A "block" of information in NC machine program means: |
| A. | One row on tape |
| B. | A word comprising several rows on tape |
| C. | One complete instruction |
| D. | One complete program for a job |
| Answer» D. One complete program for a job | |
| 2120. |
In computer aided drafting practice, an arc is denned by: |
| A. | Two end points only |
| B. | centre and radius |
| C. | Radius and one end point |
| D. | Two end points and centre |
| Answer» E. | |
| 2121. |
Consider the following statements regarding numerically controlled machine tools: 1. They reduce non-productive time 2. They reduce fixturing 3. They reduce maintenance cost Which of these statements are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 1 and 3 |
| Answer» C. 2 and 3 | |
| 2122. |
Which of the following are the rules of programming NC machine tools in APT language? 1. Only capital letters are used 2. A period is placed at the end of each statement 3. Insertion of space does not affect the APT word. Select the correct answer using the codes given below; |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 1 and 3 |
| D. | 1 alone |
| Answer» D. 1 alone | |
| 2123. |
According to the principle of location in jigs and fixtures, how many degrees of freedom are to be eliminated to have a body fixed in space? |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» E. | |
| 2124. |
Consider the following alignment tests on machine tools: 1. Straightness 2. Flatness 3. Run out 4. Parallelism Which of the above alignment tests on machine tools are common to both lathe and shaper? |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 3 and 4 |
| D. | 1 and 4 |
| Answer» C. 3 and 4 | |
| 2125. |
Which one of the following is the most significant property to be considered in the selection of material for the manufacture of locating pins and drill jig bushes used in jigs and fixtures? |
| A. | Wear resistance |
| B. | elasticity |
| C. | Shear strength |
| D. | tensile strength |
| Answer» D. tensile strength | |
| 2126. |
Match List-I (An element of jigs and fixtures) with List-II (Association system) and select the correct answer using the codes given below the lists: List-I (An element of jigs and fixtures) List-II (Association system) A. Bush 1. Milling fixture B. Setting block 2. Turning fixture C. Diamond pin 3. Radial location D. V-block 4. Cylindrical location 5. Drill jigs Codes: |
| A. | A\[\to \]5, B\[\to \]4, C\[\to \]3, D\[\to \]1 |
| B. | A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 |
| C. | A\[\to \]5, B\[\to \]1, C\[\to \]3, D\[\to \]4 |
| D. | A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 |
| Answer» D. A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 | |
| 2127. |
Match List-I (Components used in jigs and fixtures) with List-II (Their functions) and select the correct answer using the codes given below the lists: List-I List-II A. Jack pin 1. To guide the drill hit during machining B. V-locator 2. For easy removal of the work-piece from the jig or fixture after the machining operation is over C. Bushes 3. To locate the circular or semicircular objects in a jig or fixture D. Ejectors 4. To locate work-pieces whose dimensions are subject to variations Codes: |
| A. | A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 |
| B. | A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 |
| C. | A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 |
| 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 | |
| 2128. |
The indexing of the turret in a single-spindle automatic lathe is done using: |
| A. | Geneva mechanism |
| B. | Ratchet and Pawl mechanism |
| C. | Rack and pinion mechanism |
| D. | Whitworth mechanism |
| Answer» B. Ratchet and Pawl mechanism | |
| 2129. |
Consider the following characteristics of a robot: 1. The tip of the robot arm moves from one point to another with its in between path not being defined. 2. It can be used for drilling holes at different points in a work-piece. 3. It can be used for V butt joint welding between two points. 4. The memory capacity required for its control unit is low. Which of these are the characteristics associated with a point-to-point robot? |
| A. | 1 and 2 |
| B. | 1, 3 and 4 |
| C. | 1, 2 and 4 |
| D. | 2, 3 and 4 |
| Answer» D. 2, 3 and 4 | |
| 2130. |
When supported on three points, out of the 12 degrees of freedom the number of degrees of freedom arrested in a body is: |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» E. | |
| 2131. |
The floating position of the holding fixture in a rotary transfer device is used to: |
| A. | improve the accuracy of location |
| B. | Reduce the tendency to over-index |
| C. | Reduce the cycle time |
| D. | Improve upon the acceleration and deceleration characteristics |
| Answer» B. Reduce the tendency to over-index | |
| 2132. |
A 'block' of information in N.C machine program means: |
| A. | One row on tape |
| B. | A word comprising several rows on tape |
| C. | One complete instruction |
| D. | One complete program for a job |
| Answer» D. One complete program for a job | |
| 2133. |
One of the pins in a dual pin locator of a jig or fixture is shaped as a "diamond pin locator" because: |
| A. | Diamond pin does not wear fast |
| B. | It is easy to clamp |
| C. | Any variation between the centres of the hole is taken care of |
| D. | It will be easy to machine afterwards when the locator is worn out. |
| Answer» D. It will be easy to machine afterwards when the locator is worn out. | |
| 2134. |
Match List-I with List-II and select the correct answer using the codes given below the lists: List-I (Track numbers on paper tape) List-II (Holes on those tracks represent) A. Track nos. 1 to 4 1. Alphabets B. Track no. 5 2. Numerals C. Track nos. 6 and 7 3. End of block D. track no. 8 4. Block number 5. Parity check Codes: |
| A. | A\[\to \]2, B\[\to \]5, C\[\to \]1, D\[\to \]3 |
| B. | A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]5 |
| C. | A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]3 |
| D. | A\[\to \]1, B\[\to \]5, C\[\to \]2, D\[\to \]3 |
| Answer» B. A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]5 | |
| 2135. |
Which of the following arc valid statements for point-to-point motion of the tool in APT language? 1. GO/TO/....... 2. GODLTA/......... 3. GO/TO....... Select the correct answer using the codes given below: |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 1 and 3 |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |
| 2136. |
If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is: |
| A. | Conical locator |
| B. | cylindrical locator |
| C. | Diamond pin locator |
| D. | vee locator |
| Answer» B. cylindrical locator | |
| 2137. |
Match List-I with List-II and select the correct answer using the codes given below the lists: List-I (Task) List-II (Recommendation) A. Three components in a straight line should work in one loading 1. Clamp with a floating pad B. Unloading of clamp element from jig is essential 2. Quick action C. Clamping of rough surface 3. Cam clamp D. Need for heavy clamping force 4. Equalizing clamp 5. Strap clamp Codes: |
| A. | A\[\to \]5, B\[\to \]2, C\[\to \]3, D\[\to \]4 |
| B. | A\[\to \]4, B\[\to \]2, C\[\to \]1, D\[\to \]5 |
| C. | A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]3 |
| D. | A\[\to \]4, B\[\to \]1, C\[\to \]5, D\[\to \]3 |
| Answer» E. | |
| 2138. |
In APT language, the cutter motion in incremental coordinate mode is addressed as: |
| A. | GO/TO/ |
| B. | GO/TO |
| C. | GO DLTA/ |
| D. | GO FWD7 |
| Answer» D. GO FWD7 | |
| 2139. |
If the earliest starting time for an activity is 8 weeks, the latest finish time is 37 weeks and the duration time of the activity is 11 weeks, then the total float is equal to: |
| A. | 18 weeks |
| B. | 14 weeks |
| C. | 56 weeks |
| D. | 40 weeks |
| Answer» B. 14 weeks | |
| 2140. |
Dummy activities are used in a network to: |
| A. | Facilitate computation of slacks |
| B. | Satisfy precedence requirements |
| C. | Determine project completion time |
| D. | Avoid use of resources. |
| Answer» E. | |
| 2141. |
Arrivals at a telephone booth are considered to be poisson with an average time of 10 minutes between one arrival and the next. The length of a phone call is assumed to be distributed exponentially with mean of 3 minutes. The probability that a person arriving at the hook will have to wait, is: |
| A. | 0.043 |
| B. | 0.3 |
| C. | 0.429 |
| D. | 0.7 |
| Answer» E. | |
| 2142. |
Consider the following statements regarding the characteristics of the standard from of a linear programming problem: 1. All the constraints are expressed in the form of equations 2. The right hand side of each constraints equation is non-negative 3. All the decision variables are non-negative Which of these statements are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 1 and 3 |
| Answer» B. 1 and 2 | |
| 2143. |
In the solution of a linear programming problem by simple method, if during an iteration, all ratios of right-hand side b, to the coefficients of entering variable a are found to be negative, it implies that the problem has: |
| A. | Infinite number of solution |
| B. | Infeasible solution |
| C. | Degeneracy |
| D. | Unbound solution |
| Answer» C. Degeneracy | |
| 2144. |
In a transportation problem North-West comer rule would yield: |
| A. | An optimum solution |
| B. | An initial feasible solution |
| C. | A Vogel's approximate solution |
| D. | A minimum cost solution |
| Answer» C. A Vogel's approximate solution | |
| 2145. |
Consider the following features: 1. All spindles operate simultaneously 2. One piece is complete each time the tools are withdrawn and the spindles are indexed 3. The tool slide indexes or revolves with the spindle carrier. Which of these features are characteristics of a multi-spindle automatic machine used for bar work? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 1 and 3 |
| Answer» B. 1 and 2 | |
| 2146. |
Two jigs are under consideration for a drilling operation to make a particular part. Jig A costs Rs. 800 and has operating cost of Rs. 0.10 per part. Jig B costs Rs. 1200 and has operating cost of Rs. 0.08 per part. The quantity of parts to be manufactured at which either jig will prove equally costly is: |
| A. | 8000 |
| B. | 15000 |
| C. | 20000 |
| D. | 23000 |
| Answer» D. 23000 | |
| 2147. |
Consider the following statements regarding fixtures employed for holding workpiece during machining. 1. The location is based on the \[3-2-1\] principle 2. The numbers refer to the pins employed in three mutually perpendicular planes to arrest all the degrees of freedom 3. Fixture also provides tool guidance. Of these statements: |
| A. | 1, 2 and 3 are correct |
| B. | 2 and 3 are correct |
| C. | 1 and 3 are correct |
| D. | 1 and 2 are correct |
| Answer» E. | |
| 2148. |
The given figure shows the Klein's construction for acceleration of the slider-crank mechanism. Which one of the following quadrilaterals represents the required acceleration diagram? |
| A. | ORST |
| B. | OPST |
| C. | ORWT |
| D. | ORPT |
| Answer» C. ORWT | |
| 2149. |
The given figure (all dimensions are in mm) shows an I-section of the beam The shear stress at point P (very close to the bottom of the flange) is 12 MPa. The stress at point Q in the web (very close to the flange) is: |
| A. | Indeterminable due to incomplete data |
| B. | 60 MPa |
| C. | 18 MPa |
| D. | 12 MPa |
| Answer» C. 18 MPa | |
| 2150. |
Two identical springs labelled as 1 and 2 are arranged in series and subjected to force F as shown in the given figure. Assume that each spring constant is K. The strain energy stored in spring 1 is: |
| A. | \[{{\text{F}}^{\text{2}}}\text{/2K}\] |
| B. | \[{{\text{F}}^{\text{2}}}\text{/4K}\] |
| C. | \[{{\text{F}}^{\text{2}}}\text{/8K}\] |
| D. | \[{{\text{F}}^{\text{2}}}\text{/16}\,\text{K}\] |
| Answer» C. \[{{\text{F}}^{\text{2}}}\text{/8K}\] | |