MCQOPTIONS
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MCQOPTIONS
This section includes 800 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
_ The relief or clearance at the cutting edge of a flat drill varies from$? |
| A. | 3° to 8° |
| B. | 20° to 30° |
| C. | 60° to 90° |
| D. | 90° to 120° |
| Answer» B. 20¬¨‚àû to 30¬¨‚àû | |
| 502. |
_ The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)$? |
| A. | VnT = C |
| B. | VTn = C |
| C. | Vn/T = C |
| D. | V/Tn = C |
| Answer» C. Vn/T = C | |
| 503. |
_ Ceramic tools are fixed to tool body by$? |
| A. | Soldering |
| B. | Brazing |
| C. | Welding |
| D. | Clamping |
| Answer» C. Welding | |
| 504. |
_ If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as$? |
| A. | ARC |
| B. | Short ARC |
| C. | ARC length |
| D. | ARC blow |
| Answer» C. ARC length | |
| 505. |
_ When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint.$? |
| A. | Single riveted |
| B. | Double riveted |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» C. Both (A) and (B) | |
| 506. |
_ The increase in depth of cut and feed rate _________ surface finish.$? |
| A. | Improves |
| B. | Deteriorates |
| C. | Does not effect |
| D. | None of these |
| Answer» C. Does not effect | |
| 507. |
_ High speed steel tools retain their hardness up to a temperature of$? |
| A. | 250°C |
| B. | 350°C |
| C. | 500°C |
| D. | 900°C |
| Answer» E. | |
| 508. |
_ Which among the NC operations given below are continuous path operations?Arc Welding (AW), Drilling (D), Laser Cutting of Sheet Metal (LC), Milling (M), Punching in Sheet Metal (P), Spot Welding (SW)$? |
| A. | AW, LC and M |
| B. | AW, D, LC and M |
| C. | D, LC, P and SW |
| D. | D, LC, and SW |
| Answer» B. AW, D, LC and M | |
| 509. |
_ A hole is of dimension œÜ = 9 ‚Çä0‚Å∫‚Å∞‚à ô‚Å∞¬π‚ŵ mm. The corresponding shaft is of dimension œÜ = 9 ‚Çä0.001‚Å∫‚Å∞‚à ô‚Å∞¬π‚Å∞ mm. The resulting assembly has$? |
| A. | Loose running fit |
| B. | Close running fit |
| C. | Transition fit |
| D. | Interference fit |
| Answer» D. Interference fit | |
| 510. |
_ For softer materials, the point angle of the drill is kept$? |
| A. | Equal to 118° |
| B. | Less than 118° |
| C. | More than 118° |
| D. | Any one of these |
| Answer» C. More than 118¬¨‚àû | |
| 511. |
_ Crater wear leads to$? |
| A. | Increase in cutting temperature |
| B. | Weakening of tool |
| C. | Friction and cutting forces |
| D. | All of these |
| Answer» E. | |
| 512. |
_ In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called$? |
| A. | Face |
| B. | Fillet |
| C. | Gash |
| D. | Land |
| Answer» D. Land | |
| 513. |
_ The grinding wheel speed (surface speed in m/min) usually varies from$? |
| A. | 500 to 1000 |
| B. | 1000 to 1500 |
| C. | 1500 to 2000 |
| D. | 2000 to 2500 |
| Answer» D. 2000 to 2500 | |
| 514. |
_ In oblique cutting system, the maximum chip thickness$? |
| A. | Occurs at the middle |
| B. | May not occur at the middle |
| C. | Depends upon the material of the tool |
| D. | Depends upon the geometry of the tool |
| Answer» C. Depends upon the material of the tool | |
| 515. |
_ Side rake angle of a single point cutting tool is the angle$? |
| A. | By which the face of the tool is inclined towards back |
| B. | By which the face of the tool is inclined sideways |
| C. | Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool |
| D. | Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base |
| Answer» C. Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool | |
| 516. |
_ In order to achieve a specific surface finish in single point turning, the most important factor to be controlled is$? |
| A. | Depth of cut |
| B. | Cutting speed |
| C. | Feed |
| D. | Tool rake angle |
| Answer» C. Feed | |
| 517. |
_ The cutting speed of a drill depends upon the$? |
| A. | Material of drill |
| B. | Type of material to be drilled |
| C. | Quality of surface finish desired |
| D. | All of these |
| Answer» E. | |
| 518. |
_ The angle formed by the leading edge of the land with a plane having the axis of the drill, is called$? |
| A. | Helix or rake angle |
| B. | Point angle |
| C. | Chisel edge angle |
| D. | Lip clearance angle |
| Answer» B. Point angle | |
| 519. |
_ The velocity of tool along the tool face is known as$? |
| A. | Shear velocity |
| B. | Chip velocity |
| C. | Cutting velocity |
| D. | Mean velocity |
| Answer» C. Cutting velocity | |
| 520. |
_ The operation of smoothing and squaring the surface around a hole is known as$? |
| A. | Counter-sinking |
| B. | Counter-boring |
| C. | Trepanning |
| D. | Spot facing |
| Answer» E. | |
| 521. |
_ In machining metal, cutting force at the cutting edge is measured by a$? |
| A. | Wattmeter |
| B. | Dynamometer |
| C. | Hydrometer |
| D. | Pyrometer |
| Answer» C. Hydrometer | |
| 522. |
_ A coarse grained grinding wheel is used to grind$? |
| A. | Hard and brittle materials |
| B. | Soft and ductile materials |
| C. | Hard and ductile materials |
| D. | Soft and brittle materials |
| Answer» C. Hard and ductile materials | |
| 523. |
_ In _________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work.$? |
| A. | Up milling |
| B. | Down milling |
| C. | Face milling |
| D. | End milling |
| Answer» C. Face milling | |
| 524. |
_ What is the type of welding defect caused due to shrinkage during solidification and by weld stresses called?$? |
| A. | Incomplete fusion |
| B. | Lamellar tearing |
| C. | Mismatch |
| D. | Shrinkage void |
| Answer» C. Mismatch | |
| 525. |
_ The angle between the face and flank of the single point cutting tool is known as$? |
| A. | Rake angle |
| B. | Clearance angle |
| C. | Lip angle |
| D. | Point angle |
| Answer» D. Point angle | |
| 526. |
_ In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called$? |
| A. | Friction zone |
| B. | Work-tool contact zone |
| C. | Shear zone |
| D. | None of these |
| Answer» D. None of these | |
| 527. |
_ In a milling operation, two side milling cutters are mounted with a desired distance between them so that both sides of a workpiece can be milled simultaneously. This set up is called$? |
| A. | Gang milling |
| B. | Straddle milling |
| C. | String milling |
| D. | Side milling |
| Answer» C. String milling | |
| 528. |
__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 | |
| 529. |
__Gear finishing operation is called__ |
| A. | Shaping |
| B. | Milling |
| C. | Hobbing |
| D. | Burnishing |
| Answer» E. | |
| 530. |
__If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?__ |
| A. | Forehand welding |
| B. | Flux cored ARC welding |
| C. | Electro slag welding |
| D. | Pulsed spray welding |
| Answer» B. Flux cored ARC welding | |
| 531. |
__If the helix angle of the drill is made ________ 30°, then the torque required to drive the drill at a given feed will be more.__ |
| A. | Equal to |
| B. | Less than |
| C. | More than |
| D. | None of these |
| Answer» C. More than | |
| 532. |
__The chuck used for setting up of heavy and irregular shaped work should be__ |
| A. | Four jaw independent chuck |
| B. | Three jaw universal chuck |
| C. | Magnetic chuck |
| D. | Drill chuck |
| Answer» B. Three jaw universal chuck | |
| 533. |
__In electro-discharge machining, dielectric is used to__ |
| A. | Help in the movement of the sparks |
| B. | Control the spark discharges |
| C. | Act as coolant |
| D. | All of these |
| Answer» E. | |
| 534. |
__It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be__ |
| A. | 10 r.p.m. |
| B. | 20 r.p.m. |
| C. | 120 r.p.m. |
| D. | 180 r.p.m. |
| Answer» C. 120 r.p.m. | |
| 535. |
__The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is__ |
| A. | Feed rate, depth of cut, cutting speed |
| B. | Depth of cut, cutting speed, feed rate |
| C. | Cutting speed, feed rate, depth of cut |
| D. | Feed rate, cutting speed, depth of cut |
| Answer» D. Feed rate, cutting speed, depth of cut | |
| 536. |
__In up milling, the thickness of chip is__ |
| A. | Minimum at the beginning of the cut and maximum at the end of the cut |
| B. | Maximum at the beginning of the cut and minimum at the end of the cut |
| C. | Uniform throughout the cut |
| D. | None of these |
| Answer» B. Maximum at the beginning of the cut and minimum at the end of the cut | |
| 537. |
__The effective number of lattice points in the unit cell of simple cubic, body centered cubic, and face centered cubic space lattices, respectively, are__ |
| A. | 1, 2, 2 |
| B. | 1, 2, 4 |
| C. | 2, 3, 4 |
| D. | 2, 4, 4 |
| Answer» C. 2, 3, 4 | |
| 538. |
__Tool life is generally better when__ |
| A. | Grain size of the metal is large |
| B. | Grain size of the metal is small |
| C. | Hard constituents are present in the micro-structure of the tool material |
| D. | None of the above |
| Answer» B. Grain size of the metal is small | |
| 539. |
__A grinding wheel becomes glazed (i.e. cutting edge takes a glass-like appearance) due to__ |
| A. | Wear of bond |
| B. | Breaking of abrasive grains |
| C. | Wear of abrasive grains |
| D. | Cracks on grinding wheel |
| Answer» D. Cracks on grinding wheel | |
| 540. |
__The advantage of a broaching operation is that__ |
| A. | Rate of production is very high |
| B. | High accuracy and high class of surface finish is possible |
| C. | Roughing and finishing cuts are completed in one pass of the tool |
| D. | All of the above |
| Answer» E. | |
| 541. |
__As the cutting speed increases, the tool cutting forces__ |
| A. | Remain constant |
| B. | Increases |
| C. | Decreases |
| D. | First increases and then decreases |
| Answer» D. First increases and then decreases | |
| 542. |
__The operation in which oil is permeated into the pores of a powder metallurgy product is known as__ |
| A. | Mixing |
| B. | Sintering |
| C. | Impregnation |
| D. | Infiltration |
| Answer» D. Infiltration | |
| 543. |
__The cutting force in up milling ________ per tooth movement of the cutter.__ |
| A. | Is zero |
| B. | Is maximum |
| C. | Decreases from maximum to zero |
| D. | Increases from zero to maximum |
| Answer» E. | |
| 544. |
__The lip angle is the angle__ |
| A. | Between the tool face and the ground end surface of flank |
| B. | Made by the face of the tool and the plane parallel to the base of the cutting tool |
| C. | Between the face of the tool and a line tangent to the machined surface at the cutting point |
| D. | None of the above |
| Answer» B. Made by the face of the tool and the plane parallel to the base of the cutting tool | |
| 545. |
__Tool life is measured by the__ |
| A. | Number of pieces machined between tool sharpenings |
| B. | Time the tool is in contact with the job |
| C. | Volume of material removed between tool sharpenings |
| D. | All of the above |
| Answer» E. | |
| 546. |
__Quality screw threads are produced by__ |
| A. | Thread milling |
| B. | Thread chasing |
| C. | Thread cutting with single point tool |
| D. | Thread casting |
| Answer» E. | |
| 547. |
__Discontinuous chips are formed during machining of__ |
| A. | Brittle metals |
| B. | Ductile metals |
| C. | Hard metals |
| D. | Soft metals |
| Answer» B. Ductile metals | |
| 548. |
__The saw milling is an operation of__ |
| A. | Producing grooves around the periphery of a cylindrical or conical workpiece |
| B. | Producing narrow slots or grooves on a workpiece |
| C. | Reproduction of an outline of a template on a workpiece |
| D. | Machining several surfaces of a workpiece simultaneously |
| Answer» C. Reproduction of an outline of a template on a workpiece | |
| 549. |
__What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?__ |
| A. | Porosity |
| B. | Undercut |
| C. | Under fill |
| D. | Crack |
| Answer» C. Under fill | |
| 550. |
_The operation of machining several surfaces of a workpiece simultaneously is called$? |
| A. | Profile milling |
| B. | Gang milling |
| C. | Saw milling |
| D. | Helical milling |
| Answer» C. Saw milling | |