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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.
| 951. |
In reaming process: |
| A. | Metal removal rate is high |
| B. | High surface finish is obtained |
| C. | High form of accuracy is obtained |
| D. | High dimensional accuracy. |
| Answer» E. | |
| 952. |
Consider the following statements regarding grinding of high carbon steel: 1. Grinding at high speed results in the reduction of chip thickness and cutting forces per grit 2. Aluminium oxide wheels are employed 3. The grinding wheel has to be of open structure. 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» C. 1 and 3 are correct | |
| 953. |
Given that cutting speed = 9 m/min, the return time to cutting time ratio is = 1 : 2 to the feed rate = 0.3 mm/stroke, the clearance at each of cut = 25 mm and that the plate is fixed 700 mm side along the direction of tool travel, the time required for finishing one flat surface of a plate of size \[700\times 300\,\,mm\] in a shaper, will be: |
| A. | 10 min |
| B. | 12.5 min |
| C. | 15 min |
| D. | 20 min |
| Answer» C. 15 min | |
| 954. |
Which one of the following operations is carried out at the minimum cutting velocity if the machines are equally rigid and the tool work materials are the same? |
| A. | Turning |
| B. | Grinding |
| C. | Boring |
| D. | Milling |
| Answer» E. | |
| 955. |
The ratio of thrust force to cutting force is nearly 2.5 in: |
| A. | Turning |
| B. | broaching |
| C. | Grinding |
| D. | plain milling |
| Answer» D. plain milling | |
| 956. |
Consider the following tool materials: 1. Carbide 2. Cermet 3. Ceramic 4. Borazon The correct sequence of these tool materials in increasing order of the their ability to retain their hot hardness is: |
| A. | 1, 2, 3, 4 |
| B. | 1, 2, 4, 3 |
| C. | 2, 1, 3, 4 |
| D. | 2, 1, 4, 3 |
| Answer» B. 1, 2, 4, 3 | |
| 957. |
Tool geometry of a single point cutting tool is specified by the following elements: 1. Back rake angle 2. Side rake angle 3. End cutting code angle 4. Side cutting code angle 5. Side relief angle 6. End relief angle 7. Nose radius The correct sequence of these tool elements used for correctly specifying tool geometry is: |
| A. | 1, 2, 3, 6, 5, 4, 7 |
| B. | 1, 2, 6, 5, 3, 4, 7 |
| C. | 1, 2, 5, 6, 3, 4, 7 |
| D. | 1, 2, 6, 3, 4, 7 |
| Answer» C. 1, 2, 5, 6, 3, 4, 7 | |
| 958. |
What is the correct sequence of the following parameters in order of their maximum to minimum influence on tool life? 1. Feed rate 2. Depth of cut 3. Cutting speed Select the correct answer using the codes below: |
| A. | 1, 2, 3 |
| B. | 3, 2, 1 |
| C. | 2, 3, 1 |
| D. | 3, 1, 2 |
| Answer» E. | |
| 959. |
The following parameters determine the model off continuous chip formation: 1. True feed 2. Cutting velocity 3. Chip thickness 4. Rake angle of the cutting tool. The parameters which govern the value of shear angle would include: |
| 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 | |
| 960. |
In centreless grinding, the workpiece centre will be: |
| A. | Above the line joining the two wheel centres |
| B. | Below the line joining the two wheel centres |
| C. | On the line joining the two wheel centres |
| D. | At the intersection of the line joining the wheel centres with the work plate plane |
| Answer» B. Below the line joining the two wheel centres | |
| 961. |
A hole of 30 mm diameter is to be produced by reaming. The minimum diameter permissible is 30.00 mm while the maximum diameter permissible is 30.05 mm. In this regard, consider the following statements about the reamer size: 1. The minimum diameter of the reamer cab be less than 30 mm. 2. The minimum diameter of the reamer cannot he less than 30 mm. 3. The maximum diameter of the reamer can be more than 30.05 mm. 4. The maximum diameter of the reamer must be less than 30.05 mm. Of these statements: |
| A. | 1 and 4 are correct |
| B. | 1 and 3 are correct |
| C. | 2 and 3 are correct |
| D. | 2 and 4 are correct |
| Answer» B. 1 and 3 are correct | |
| 962. |
Internal gears can be made by: |
| A. | Hobbing |
| B. | Shaping with pinion cutter |
| C. | Shaping with rack cutter |
| D. | Milling |
| Answer» C. Shaping with rack cutter | |
| 963. |
Climb milling is chosen while machining because: |
| A. | The chip thickness increases gradually |
| B. | It enables the cutter to dig in and start the cut |
| C. | The specific power consumption is reduced |
| D. | Better surface finish can be obtained |
| Answer» B. It enables the cutter to dig in and start the cut | |
| 964. |
The main purpose of boring operation, as compared to drilling is to: |
| A. | Drill a hole |
| B. | Finish drilled hole |
| C. | Correct the hole |
| D. | Enlarge the existing hole |
| Answer» E. | |
| 965. |
Shell reamers are mounted on: |
| A. | Tool holders |
| B. | armour plates |
| C. | Arbors |
| D. | Shanks |
| Answer» D. Shanks | |
| 966. |
Low helix angle drills are preferred for drilling holes in: |
| A. | Plastics |
| B. | copper |
| C. | Cast steel |
| D. | carbon steel |
| Answer» E. | |
| 967. |
Which of the following can be used in dynamometer for measuring cutting forces? 1. Strain gauge 2. Peizoelectric transducer 3. Pneumatic transducer 4. Hydraulic transducer. |
| A. | 1 and 2 |
| B. | 1, 3 and 4 |
| C. | 2, 3 and 4 |
| D. | 1, 2, 3 and 4 |
| Answer» B. 1, 3 and 4 | |
| 968. |
Maximum production of small and slender parts is done by: |
| A. | Watch maker's lathe |
| B. | Sliding head stock automatic lathe |
| C. | Multi-spindle automatic lathe |
| D. | Capstan lathe |
| Answer» D. Capstan lathe | |
| 969. |
Match List-1 with List-11 and select the correct answer using the codes given below the lists: List-I (Machine Tool Cutting Too) List-II (Part/Characteristics) A. Screw cutting lathe 1. Self-locking taper B. Drill 2. Chasing dial C. End mill 3. Wiper insert D. Grinding wheel 4. Self-releasing taper 5. Balance weights Codes: |
| A. | A\[\to \]4, B\[\to \]5, C\[\to \]3, D\[\to \]1 |
| B. | A\[\to \]2, B\[\to \]1, C\[\to \]4, D\[\to \]5 |
| C. | A\[\to \]4, B\[\to \]1, C\[\to \]3, D\[\to \]5 |
| D. | A\[\to \]2, B\[\to \]5, C\[\to \]4, D\[\to \]1 |
| Answer» C. A\[\to \]4, B\[\to \]1, C\[\to \]3, D\[\to \]5 | |
| 970. |
What is the distance through which the cutter has to move before the full depth of cut is acquired in milling? Where D = diameter of the milling cutter and D = depth of cut. |
| A. | \[\sqrt{d(D-d)}\] |
| B. | \[\sqrt{D(D-d)}\] |
| C. | \[\sqrt{(D-d)d/2}\] |
| D. | \[\sqrt{(D-d)d/2}\] |
| Answer» D. \[\sqrt{(D-d)d/2}\] | |
| 971. |
Which one of the following is not a characteristic of ceramic tools? |
| A. | Produced by sintering process |
| B. | Hot hardness up to \[1400{}^\circ C\] |
| C. | Exhibit high coefficient of friction with most work materials |
| D. | Tool tips are highly brittle |
| Answer» D. Tool tips are highly brittle | |
| 972. |
Which of the following statements is incorrect with reference of lathe cutting tools? |
| A. | The flank of the tool is the surface below and adjacent to the cutting edges |
| B. | The nose is the comer, or chamfer joining the side cutting and the end cutting edges |
| C. | The heel is that part which is shaped to produce the cutting edges and face |
| D. | The base is that surface of the shank which against the support and takes tangent |
| Answer» D. The base is that surface of the shank which against the support and takes tangent | |
| 973. |
Consider the following parameters: 1. Grinding wheel diameter. 2. Regulating wheel diameter. 3. Speed of the grinding wheel. 4. Speed of the regulating wheel 5. Angle between the axes of grinding and regulating wheels. Among these parameters, those which influence the axial feed rate in centreless grinding would include: |
| A. | 2, 4 and 5 |
| B. | 1, 2 and 3 |
| C. | 1, 4 and 5 |
| D. | 3, 4 and 5 |
| Answer» B. 1, 2 and 3 | |
| 974. |
Match List-I with List-II and select the correct answer using the codes given below the lists: List-I (Cutting Tool Material) List-II (Major Characteristic Constituent) A. High speed steel 1. Carbon B. Satellite 2. Molybdenum C. Diamond 3. Nitride D. Coated carbide tool 4. Columbium 5. Cobalt Codes: |
| A. | A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]5 |
| B. | A\[\to \]2, B\[\to \]5, C\[\to \]1, D\[\to \]3 |
| C. | A\[\to \]5, B\[\to \]2, C\[\to \]4, D\[\to \]3 |
| D. | A\[\to \]5, B\[\to \]4, C\[\to \]2, D\[\to \]3 |
| Answer» C. A\[\to \]5, B\[\to \]2, C\[\to \]4, D\[\to \]3 | |
| 975. |
In ASA System, if the tool nomenclature is \[8-6-5-5-10-15-2\] mm, then the side rake angle will be |
| A. | \[5{}^\circ \] |
| B. | \[6{}^\circ \] |
| C. | \[8{}^\circ \] |
| D. | \[10{}^\circ \] |
| Answer» C. \[8{}^\circ \] | |
| 976. |
For achieving a specific surface finish in single point turning, the most important factor to be considered is |
| A. | Depth of cut |
| B. | cutting speed |
| C. | Feed |
| D. | tool rake angle |
| Answer» D. tool rake angle | |
| 977. |
Tool life in the case of a grinding wheel is the time: |
| A. | Between two successive wheel dressing |
| B. | Taken for the wheel to be balanced |
| C. | Taken between two successive wheel balancing |
| D. | Taken for a wear of 1 mm on its diameter |
| Answer» B. Taken for the wheel to be balanced | |
| 978. |
In a single-point turning operation of steel with a cemented carbide tool, Taylor's tool life exponent is 0.25. If the cutting speed is halved, the tool life will increase by: |
| A. | Two times |
| B. | four times |
| C. | Eight times |
| D. | sixteen times |
| Answer» E. | |
| 979. |
Match List-I (Machining process) with List-II (Associated medium) and select the correct answer using the codes giver below the lists: List-I List-II A. Ultrasonic machining 1. Kerosene B. EDM 2. Abrasive slurry C. ECM 3. Vacuum D. EBM 4. Salt solution Codes: |
| A. | A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1 |
| B. | A\[\to \]2, B\[\to \]1, C\[\to \]4, D\[\to \]3 |
| C. | A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3 |
| D. | A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 |
| Answer» C. A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3 | |
| 980. |
CLA value for Honing process is: |
| A. | 6 |
| B. | \[0.05-3.0\] |
| C. | \[0.05-1.0\] |
| D. | \[0.025-0.1\] |
| Answer» D. \[0.025-0.1\] | |
| 981. |
Poor machinability of centrifugally cast iron pipe is due to: |
| A. | Chilling |
| B. | Segregation |
| C. | Dense structure |
| D. | Highmould rotation speed |
| Answer» B. Segregation | |
| 982. |
The gauge factor of a resistive pick-up of cutting force dynamometer is donned as the ratio of: |
| A. | Applied strain to the resistance of the wire |
| B. | The proportional change in resistance to thi applied strain |
| C. | The resistance to the applied strain |
| D. | Change in resistance to the applied strain. |
| Answer» C. The resistance to the applied strain | |
| 983. |
In metal cutting operation, the approximate ratio of heat distributed among chip, tool and work, in that order, is: |
| A. | 80 : 10 : 10 |
| B. | 1.39829861111111 |
| C. | 20 : 60 : 10 |
| D. | 0.424537037037037 |
| Answer» B. 1.39829861111111 | |
| 984. |
Consider the following criteria in evaluation machinability: 1. Surface finish 2. Type of chips 3. Tool life 4. Power consumption In modern high speed CNC machining with coated carbide took, the correct sequence of these criteria in decreasing order of their importance is: |
| A. | 1, 2, 4, 3 |
| B. | 2, 1, 4, 3 |
| C. | 1, 2, 3, 4 |
| D. | 2, 1, 3, 4 |
| Answer» D. 2, 1, 3, 4 | |
| 985. |
A component requires a hole which must be within the two limits of 25.03 and 25.04 mm diameter. Which of the following statements about the reamer size are correct? 1. Reamer size cannot be below 25.03 mm 2. Reamer size cannot be above 25.04 mm 3. Reamer size cannot he 25.03 mm 4. Reamer size can be 25.04 mm Select the correct answer using the code given below: |
| A. | 1 and 3 |
| B. | 1 and 2 |
| C. | 3 and 4 |
| D. | 2 and 4 |
| Answer» C. 3 and 4 | |
| 986. |
Which one of the following pairs of parameters am effects is not correctly matched? |
| A. | Large wheel diameter...Reduced wheel wear |
| B. | Large depth of cut...Increased well wear |
| C. | Large work diameter...Increased well wear |
| D. | Large well speed... Reduced well wear |
| Answer» D. Large well speed... Reduced well wear | |
| 987. |
Mate List-I with List-II and select the correct answer using the codes given below the lists: List-I List-II A. Reaming 1. Smoothing and squaring surface around the hole for proper seating B. Counter-boring 2. Sizing and finishing the hole C. Counter-sinking 3. Enlarging the end of the hole D. Spot facing 4. Making a conical enlargement at the end of the hole Codes: |
| A. | A\[\to \]3, B\[\to \]2, C\[\to \]4, D\[\to \]1 |
| B. | A\[\to \]2, B\[\to \]3, C\[\to \]1, D\[\to \]4 |
| C. | A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 |
| D. | A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1 |
| Answer» E. | |
| 988. |
A single short thread of pitch 2 mm is to be produced on a lathe having a lead screw with a double start thread of pitch 4 mm. The ratio of speeds between the spindle and lead screw for this operation is: |
| A. | 1 : 2 |
| B. | 0.0840277777777778 |
| C. | 1 : 4 |
| D. | 0.167361111111111 |
| Answer» D. 0.167361111111111 | |
| 989. |
Match List-I (Gear component) with List-II (Preferred method of manufacturing) and select the correct answer using the codes given below the lists: List-I List-II A. Gear for clocks 1. Hobbing B. Bakelite gears 2. Stamping C. Aluminium gears 3. Powder compacting D. Automobile transmission gears 4. Sand casting 5. Extrusion Codes: |
| A. | A\[\to \]2, B\[\to \]3, C\[\to \]5, D\[\to \]1 |
| B. | A\[\to \]5, B\[\to \]3, C\[\to \]4, D\[\to \]2 |
| C. | A\[\to \]5, B\[\to \]1, C\[\to \]2, D\[\to \]3 |
| D. | A\[\to \]2, B\[\to \]4, C\[\to \]5, D\[\to \]3 |
| Answer» B. A\[\to \]5, B\[\to \]3, C\[\to \]4, D\[\to \]2 | |
| 990. |
Which of the following motions are not needed for spur gear cutting with a hob? 1. Rotary motion of hob 2. Linear axial reciprocatory motion of hob 3. Rotary motion of gear blank 4. Radial advancement of hob. 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» E. | |
| 991. |
Consider the following statements: In Up milling process, 1. The cutter starts the cut from the machined surface and proceeds upwards 2. The cutter starts the cut from the top surface and proceeds downwards 3. The job is fed in a direction opposite to that of cutter rotation 4. The job is fed in the same direction as that of cutter rotation. Of these statements: |
| A. | 1 and 3 are correct |
| B. | 1 and 4 are correct |
| C. | 2 and 3 are correct |
| D. | 2 and 4 are correct |
| Answer» B. 1 and 4 are correct | |
| 992. |
A surface finish of 0.025\[-\]0.1 micrometer CLA values is to be produced. Which machining process would you recommend? |
| A. | Grinding |
| B. | Rough turning |
| C. | Lapping |
| D. | Honing |
| Answer» D. Honing | |
| 993. |
Tail stock set over method of taper turning is preferred for: |
| A. | Internal tapers |
| B. | small tapers |
| C. | Long slender tapers |
| D. | steep tapers |
| Answer» D. steep tapers | |
| 994. |
Tool life is generally specified by: |
| A. | Number of pieces machined |
| B. | Volume of metal removed |
| C. | Actual cutting time |
| D. | Any of the above |
| Answer» E. | |
| 995. |
A hydraulic coupling transmits 1 kW of power at an input speed of 200 rpm, with a slip of 2%. If the input speed is changed to 400 rpm, the power transmitted with the same slip is: |
| A. | 2 kW |
| B. | 1/2 kW |
| C. | 4 kW |
| D. | 8 Kw |
| Answer» D. 8 Kw | |
| 996. |
The maximum number of jets generally employed in an impulse turbine without jet interference is: |
| A. | 4 |
| B. | 6 |
| C. | 8 |
| D. | 12 |
| Answer» C. 8 | |
| 997. |
A centrifugal blower delivering \[\text{Q}{{\text{m}}^{\text{3}}}\text{/s}\] against a head of H m is driven at half the original speed. The new head and discharge would be: |
| A. | \[H\,and\,Q/2\] |
| B. | \[\frac{H}{4}\,and\,\frac{Q}{2}\] |
| C. | \[\frac{H}{2}\,and\,\frac{Q}{8}\] |
| D. | \[H\,and\,\frac{Q}{4}\] |
| Answer» C. \[\frac{H}{2}\,and\,\frac{Q}{8}\] | |
| 998. |
In fluid machinery, the relationship between saturation temperature and pressure decides the process of: |
| A. | Flow separation |
| B. | turbulent mixing |
| C. | Cavitation |
| D. | water hammer |
| Answer» D. water hammer | |
| 999. |
For a water turbine, running at constant head and speed, the operating characteristics curves in the given figure show, that upto a certain discharge 'q' both output power and efficiency remain zero. The discharge 'q' is required to: |
| A. | Overcome initial inertia |
| B. | Overcome initial friction |
| C. | Keep the hydraulic circuit full |
| D. | Keep the turbine running at no load |
| Answer» E. | |
| 1000. |
Consider the following statements pertaining to a centrifugal pump 1. The manometric head is the head developed by 2. The suction pipe has, generally, a larger diameter as compared to the discharge pipe. 3. The suction pipe is provided with a foot valve and a strainer. 4. The delivery pipe is provided with a foot valve and a strainer. Of these statements: |
| A. | 1, 2 and 3 and 4 are correct |
| B. | 1 and 2 are correct |
| C. | 2 and 3 are correct |
| D. | 1 and 3 are correct |
| Answer» D. 1 and 3 are correct | |