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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.
| 901. |
The 'spring back' effect in press working is: |
| A. | Elastic recovery of the sheet metal after removal of the load |
| B. | Regaining the original shape of the sheet metal |
| C. | Release of stored energy in the sheet metal |
| D. | Partial recovery of the sheet metal |
| Answer» B. Regaining the original shape of the sheet metal | |
| 902. |
Match List-I (Forging operations) with List-II (Descriptions) and select the correct answer using the codes given below the Lists: List-I List-II A. Flattening 1. Thickness is reduced continuously at different sections along at length B. Drawing 2. Metal is displaced away from centre, reducing thickness in middle and increasing length C. Fullering 3. Rod is pulled through a die D. Wire drawing 4. Pressing a workpiece between two flat dies Codes: |
| A. | A\[\to \]4, B\[\to \]2, C\[\to \]1, D\[\to \]4 |
| B. | A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]3 |
| C. | A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]4 |
| D. | A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]3 |
| Answer» C. A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]4 | |
| 903. |
A cylindrical piece of cork weighing 'W floats with its axis in horizontal position in a liquid of relative density 4. By anchoring the bottom, the cork piece is made to float at natural equilibrium position with its axis vertical. The vertically downward force exerted by anchoring would be: |
| A. | 0.5 W |
| B. | W |
| C. | 2 W |
| D. | 4 W |
| Answer» E. | |
| 904. |
Consider the following statements: Filling up a part of the empty hood of a ship with ballasts will: 1. Reduce the metacentric height 2. Lower the position of the centre of gravity 3. Elevate the position of centre of gravity. 4. Elevate the position of centre of buoyancy. Of these statements: |
| A. | 1, 3 and 4 are correct |
| B. | 1 and 2 are correct |
| C. | 3 and 4 are correct |
| D. | 2 and 4 are correct |
| Answer» E. | |
| 905. |
In the figure shown below, air is contained in the pipe and water is the manometer liquid. The pressure A is approximately: |
| A. | 10.14 m of water absolute |
| B. | 0.2 m of water |
| C. | 1.2 of water vacuum |
| D. | 4901 Pa |
| Answer» E. | |
| 906. |
A right-circular cylinder open at the top is filled with liquid of relative density 1.2. It is rotated about its vertical axis at such a speed that half the liquid spills out. The pressure at the centre of the bottom will be: |
| A. | Zero |
| B. | One-fourth of the value when the cylinder was full |
| C. | Half of the value when the cylinder was full |
| D. | Not determinable from the given data. |
| Answer» B. One-fourth of the value when the cylinder was full | |
| 907. |
Which of the following forces act on a fluid at rest? 1. Gravity force 2. Hydrostatic force 3. Surface tension 4. Viscous force Select the correct answer using the codes given below: |
| A. | 1, 2, 3 and 4 |
| B. | 1, 2 and 3 |
| C. | 2, and 4 |
| D. | 1, 3 and 4 |
| Answer» C. 2, and 4 | |
| 908. |
The normal stress is the same in directions at a point in a fluid only when; |
| A. | The fluid is frictional |
| B. | The fluid is frictionless and incompressible |
| C. | The fluid has zero viscosity and is at rest |
| D. | One fluid layer has no motion relative to an adjacent layer. |
| Answer» C. The fluid has zero viscosity and is at rest | |
| 909. |
An invicid irrotational flow field of free vortex motion has a circulation constant \[\Omega \,.\] the tangential velocity at any point in the flow field is given by \[\text{ }\!\!\Omega\!\!\text{ /r}\] where, r, is the radial distance from the centre. At the centre, there is a mathematical singularity which can be phiysically substituted by a forced vortex motion \[(r={{r}_{c}}),\] the angular velocity E is given by: |
| A. | \[\text{ }\!\!\Omega\!\!\text{ /(}{{\text{r}}_{c}}{{)}^{2}}\] |
| B. | \[\text{ }\!\!\Omega\!\!\text{ /}{{\text{r}}_{c}}\] |
| C. | \[\text{ }\!\!\Omega\!\!\text{ }\,{{\text{r}}_{c}}\] |
| D. | \[\text{ }\!\!\Omega\!\!\text{ }\,\text{r}_{c}^{2}\] |
| Answer» B. \[\text{ }\!\!\Omega\!\!\text{ /}{{\text{r}}_{c}}\] | |
| 910. |
Match List-I (Products) with List-II (Suitable processes) and select the correct answer using the codes given below the Lists: List-I List-II A. Connecting rods 1. Welding B. Pressure vessels 2. Extrusion C. Machine tool beds 3. Forging D. Collapsible tubes 4. Casting Codes: |
| A. | A\[\to \]2, B\[\to \]5, C\[\to \]3, D\[\to \]4 |
| B. | A\[\to \]1, B\[\to \]2, C\[\to \]5, D\[\to \]4 |
| C. | A\[\to \]4, B\[\to \]1, C\[\to \]3, D\[\to \]2 |
| D. | A\[\to \]4, B\[\to \]1, C\[\to \]5, D\[\to \]2 |
| Answer» B. A\[\to \]1, B\[\to \]2, C\[\to \]5, D\[\to \]4 | |
| 911. |
Consider the following characteristics of rolling process: 1. Shows work hardening effect 2. Surface finish is not good 3. Heavy reduction in areas can he obtained Which of these characteristics are associated with hot rolling? |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 1, 2 and 3 |
| Answer» C. 2 and 3 | |
| 912. |
Match List-I (Operations) with List-II (Stresses induced) and select the correct answer using the codes given below the Lists: List-I List-II A. Blanking 1. Tension B. Stretch forming 2. Compression C. Coining 3. Shearing D. Deep drawing 4. Tension and Codes: |
| A. | A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 |
| B. | A\[\to \]2, B\[\to \]4, C\[\to \]3, D\[\to \]1 |
| C. | A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 |
| 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 | |
| 913. |
Consider the following statements: 1. Metal forming decreases harmful effects of impurities and improves mechanical strength. 2. Metal working process is a plastic deformation process. 3. Very intricate shapes can be produced by forging process as compared to casting process. Which of the statements given above are correct |
| A. | 1, 2 and 3 |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 1 and 3 only |
| Answer» B. 1 and 2 only | |
| 914. |
A cylindrical vessel with flat bottom can be deep drawn by: |
| A. | Shallow drawing |
| B. | Single action deep drawing |
| C. | Double action deep drawing |
| D. | Triple action deep drawing. |
| Answer» D. Triple action deep drawing. | |
| 915. |
Magnetic forming is an example of: |
| A. | Cold forming |
| B. | Hot forming |
| C. | High energy rate forming |
| D. | Roll forming. |
| Answer» D. Roll forming. | |
| 916. |
Which one of the following materials is used as the bonding material for grinding wheels? |
| A. | Silicon carbide |
| B. | Sodium silicate |
| C. | Boron carbide |
| D. | Aluminium oxide |
| Answer» C. Boron carbide | |
| 917. |
Consider the following operations: 1. Undercutting 2. Plain turning 3. Taper turning 4. Thread cutting The correct sequence of these operations in machining a product is: |
| A. | 2, 3, 4, 1 |
| B. | 3, 2, 4, 1 |
| C. | 2, 3, 1, 4 |
| D. | 3, 2, 1, 4 |
| Answer» D. 3, 2, 1, 4 | |
| 918. |
Which of the following are the advantages of a hydraulic; shaper over mechanically driven shaper? 1. More strokes per minute can he obtained at a given cutting speed 2. The cutting strokes has a definite stopping point 3. It is simpler in construction 4. Cutting speed is constant throughout most of shecurl. Select the correct answer using the codes given below: |
| A. | 1 and 2 |
| B. | 1 and 4 |
| C. | 2 and 4 |
| D. | 1, 3 and 4 |
| Answer» D. 1, 3 and 4 | |
| 919. |
Match List-I (Type of drill) with List-II (Application) and select the correct answer using the codes given below the lists: List-I List-II A. Straight shank 1. Soft materials B. Taper shank 2. Deep holes C. Single flute 3. General purpose D. High helix 4. Small hole diameter 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\[\to \]2, D\[\to \]1 |
| D. | A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 |
| Answer» B. A\[\to \]3, B\[\to \]4, C\[\to \]2, D\[\to \]1 | |
| 920. |
Consider the following forces acting on a finish 1 turning tool: 1. Feed force 2. Thrust force 3. Cutting force. The correct sequence of the decreasing order of the magnitudes of these forces is: |
| A. | 1, 2, 3 |
| B. | 2, 3, 1 |
| C. | 3, 1, 2 |
| D. | 3, 2, 1 |
| Answer» B. 2, 3, 1 | |
| 921. |
Consider the following elements: 1. Nose radius 2. Cutting speed 3. Depth of cut 4. Feed. The correct sequence of these elements in decreasing order of their influence on tool life is: |
| A. | 2, 4, 3, 1 |
| B. | 4, 2, 3, 1 |
| C. | 2, 4, 1, 3 |
| D. | 4, 2, 1, 3 |
| Answer» B. 4, 2, 3, 1 | |
| 922. |
In orthogonal cutting, the depth of cut is 03 mm at a cutting speed of 2 m/s. If the chip thickness is 0.75 mm, the velocity is: |
| A. | 133 m/s |
| B. | 2 m/s |
| C. | 23 m/s |
| D. | 3 m/s |
| Answer» B. 2 m/s | |
| 923. |
For the manufacture of full depth spur gear by hobbing process, the number of teeth to be cut = 30, module = 3 mm and pressure angle = \[20{}^\circ \] The radial depth of cut to be employed should be equal to: |
| A. | 3.75 mm |
| B. | 4.50 mm |
| C. | 6.00 mm |
| D. | 6.75 mm |
| Answer» E. | |
| 924. |
Gear cutting on a milling machine using an involute profile cutter is a: |
| A. | Gear forming process |
| B. | Gear generating process |
| C. | Gear shaping process |
| D. | Highly accurate gear-producing process. |
| Answer» B. Gear generating process | |
| 925. |
Consider the following processes for gear manufacture: 1. Milling with form cutter 2. Rack type gear shaper (gear planer) 3. Rotary gear shaper (gear shaper) 4. Gear bobbing. The correct sequence of these processes in increasing order of accuracy of convolute profile of the gear is: |
| A. | 3, 2, 4, 1 |
| B. | 2, 3, 4, 1 |
| C. | 2, 1, 4 |
| D. | 2, 3, 1, 4 |
| Answer» B. 2, 3, 4, 1 | |
| 926. |
Specific energy requirements in a grinding process are more than those in turning for the same metal removal rate because of the: |
| A. | Specific pressures between wheel and work being high |
| B. | Size effect of the larger contact areas between wheel and work |
| C. | High cutting velocities |
| D. | High heat produced during grinding |
| Answer» E. | |
| 927. |
Which of the following forces are measured directly by strain gauges or force dynamometers during metal cutting? 1. Force exerted by the tool on the chip acting normally to the tool face 2. Horizontal cutting force exerted by the tool on the workpiece 3. Frictional resistance of the tool against the chip flow acting along the tool face 4. Vertical force which helps in holding the tool in position. |
| A. | 1 and 3 |
| B. | 2 and 4 |
| C. | 1 and 4 |
| D. | 2 and 4 |
| Answer» B. 2 and 4 | |
| 928. |
In turning of slender rods, it is necessary to keep the transverse force minimum mainly? |
| A. | Improve the surface finish |
| B. | Increase productivity |
| C. | Improve cutting efficiency |
| D. | Reduce vibrations and chatter |
| Answer» E. | |
| 929. |
In gear hobbing: |
| A. | Only hob rotates |
| B. | Only gear blank rotates |
| C. | Both hob and gear blank rotate |
| D. | Neither hob nor gear blank rotates |
| Answer» D. Neither hob nor gear blank rotates | |
| 930. |
Small amounts of which one of the following elements/pairs of elements is added to steel to increase its machinability? |
| A. | Nickel |
| B. | sulphur and phosphorus |
| C. | Silicon |
| D. | Manganese and copper |
| Answer» E. | |
| 931. |
Which of the following indicate better machinability? 1. Smaller shear angle 2. Higher cutting force 3. Longer tool life 4. Better surface finish. |
| A. | 1 and 3 |
| B. | 2 and 4 |
| C. | 1 and 2 |
| D. | 3 and 4 |
| Answer» D. 3 and 4 | |
| 932. |
Notch wear at the outside edge of the depth of cut is due to: |
| A. | Abrasive action of the work hardened chip material |
| B. | Oxidation |
| C. | Slip-stick action of the chip |
| D. | Chipping |
| Answer» C. Slip-stick action of the chip | |
| 933. |
A machinist desires to turn a round steel stock of outside diameter 100 mm at 1000 rpm. The material has tensile strength of 75 kg/mm. The depth of cut chosen is 3 mm at a feed rate of 0.3 mm/rev. Which one of the following tool materials will be suitable for machining the component under the specified cutting conditions? |
| A. | Sintered carbides |
| B. | Ceramic |
| C. | HSS |
| D. | Diansond |
| Answer» B. Ceramic | |
| 934. |
The limit to the maximum hardness of a work material which can be machined with HSS tools even at low speeds is set by which one of the following tool failure mechanisms? |
| A. | Attrition |
| B. | Abrasion |
| C. | Diffusion |
| D. | Plastic deformation under compression |
| Answer» B. Abrasion | |
| 935. |
Cubic boron nitride: |
| A. | Has a very high hardness which is comparable to that of diamon |
| B. | Has a hardness which is slightly more than due of HSS |
| C. | Is used for making cylinder blocks of aircraft engines |
| D. | Is used for making optical glasses |
| Answer» E. | |
| 936. |
Chip equivalent is increased by: |
| A. | An increase in side-cutting edge angle of tool |
| B. | An increase in nose radius and side cutting edge angle of tool |
| C. | Increasing the plant area of cut |
| D. | Increasing the depth of cut |
| Answer» B. An increase in nose radius and side cutting edge angle of tool | |
| 937. |
Match List-I with List-II and select the correct answer using the codes given below the lists: List-I (Product) List-II (Process of Manufacture) A. Automobile piston in aluminium alloy 1. Pressure die-casting B. Engine crankshaft spheroidal graphite-iron casting 2. Gravity die-casting C. Carburettor housing in aluminium alloy 3. Sand casting D. Cast titanium blades 4. Precision investment easting 5. Shell moulding. Codes: |
| A. | A\[\to \]2, B\[\to \]3, C\[\to \]1, D\[\to \]5 |
| B. | A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]5 |
| C. | A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 |
| D. | A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3 |
| Answer» B. A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]5 | |
| 938. |
Soft material cannot be economically ground due to: |
| A. | The high temperatures involved |
| B. | Frequent wheel clogging |
| C. | Rapid wheel wear |
| D. | Low workpiece stiffness |
| Answer» B. Frequent wheel clogging | |
| 939. |
Buffing wheels are made of: |
| A. | Softer metals |
| B. | cotton fabric |
| C. | Carbon |
| D. | graphite |
| Answer» C. Carbon | |
| 940. |
In the grinding wheel of A 60 G 7 B 23, B stands for: |
| A. | Resinoid bond |
| B. | rubber bond |
| C. | Shellac bond |
| D. | silicate bond |
| Answer» B. rubber bond | |
| 941. |
The primary tool force used in calculating the total power consumption in machining is the: |
| A. | Radial force |
| B. | tangential force |
| C. | Axial force |
| D. | frictional force |
| Answer» C. Axial force | |
| 942. |
Consider the following work materials: 1. Titanium 2. Mild steel 3. Stainless steel 4. Grey cast iron. The correct sequence of these materials in terms of increasing order of difficulty in machining is: |
| A. | 4, 2, 3, 1 |
| B. | 4, 2, 1, 3 |
| C. | 2, 4, 3, 1 |
| D. | 2, 4, 1, 3 |
| Answer» B. 4, 2, 1, 3 | |
| 943. |
Crater wear is predominant in: |
| A. | Carbon steel tools |
| B. | Tungsten carbide tools |
| C. | High speed steel .tools |
| D. | Ceramic tools |
| Answer» C. High speed steel .tools | |
| 944. |
Match List-I with List-II and select the correct answer using the codes given below the lists: List-I (Wear type) List-II (Associated mechanism) A. Abrasive wear 1. Galvanic action B. Adhesive wear 2. Polughing action C. Electrolytic wear 3. Molecular transfer D. Diffusion wear 4. Plastic deformation 5. Metallic bond. Codes: |
| A. | A\[\to \]2, B\[\to \]2, C\[\to \]1, D\[\to \]3 |
| B. | A\[\to \]5, B\[\to \]5, C\[\to \]1, D\[\to \]3 |
| C. | A\[\to \]2, B\[\to \]1, C\[\to \]3, D\[\to \]4 |
| D. | A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]4 |
| Answer» B. A\[\to \]5, B\[\to \]5, C\[\to \]1, D\[\to \]3 | |
| 945. |
The compositions of some of the alloy steels are as under: 1. 18 W 4 Ct 1 V 2. 12 Mo I W 4 Cr IV 3. 6 Mo 6 W 4 Cr 1 V 4. 18 W 8 Cr IV The compositions of commonly used high speed steels would in clude: |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 1 and 4 |
| D. | 1 and 3 |
| Answer» D. 1 and 3 | |
| 946. |
Consider the following statements about nose radius: 1. It improves tool life. 2. It reduces the cutting force. 3. It improves the surface finish. Of these statements: |
| A. | 1 and 2 are correct |
| B. | 2 and 3 are correct |
| C. | 1 and 3 are correct |
| D. | 1, 2 and 3 are correct |
| Answer» E. | |
| 947. |
Single point thread cutting tool should ideally have: |
| A. | Zero rake |
| B. | Positive rake |
| C. | Negative rake |
| D. | Normal rake |
| Answer» B. Positive rake | |
| 948. |
Gear burnishing process is for: |
| A. | Removing residual stresses from teeth roots |
| B. | Surface finishing |
| C. | Under-cut gears |
| D. | cycloidal gears |
| Answer» C. Under-cut gears | |
| 949. |
The angle between the face and the flank of the single point cutting tool is known as: |
| A. | Rake angle |
| B. | clearance angle |
| C. | Lip angle |
| D. | point angle |
| Answer» D. point angle | |
| 950. |
The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at cutting velocity of 18 m/min is: |
| A. | 1.02 |
| B. | 1.32 |
| C. | 1.06 |
| D. | 1.82 |
| Answer» C. 1.06 | |