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.
| 601. |
_NC contouring is an example of$? |
| A. | Continuous path positioning |
| B. | Point-to-point positioning |
| C. | Absolute positioning |
| D. | Incremental positioning |
| Answer» B. Point-to-point positioning | |
| 602. |
_A fine grained grinding wheel is used to grind$? |
| A. | Hard and brittle materials |
| B. | Soft and ductile materials |
| C. | Hard and ductile materials |
| D. | Soft and brittle materials |
| Answer» B. Soft and ductile materials | |
| 603. |
The taper on the lathe spindle is$? |
| A. | 1 in 10 |
| B. | 1 in 15 |
| C. | 1 in 20 |
| D. | 1 in 30 |
| Answer» D. 1 in 30 | |
| 604. |
The size of a lathe is specified by the$? |
| A. | Length between centers |
| B. | Swing diameter over the bed |
| C. | Swing diameter over the carriage |
| D. | All of these |
| Answer» E. | |
| 605. |
Which of the following statement is wrong as regard to down milling?$? |
| A. | It can not be used on old machines due to backlash between the feed screw of the table and the nut. |
| B. | The chips are disposed off easily and do not interfere with the cutting. |
| C. | The surface milled appears to be slightly wavy. |
| D. | The coolant can be poured directly at the cutting zone where the cutting force is maximum. |
| Answer» D. The coolant can be poured directly at the cutting zone where the cutting force is maximum. | |
| 606. |
In lapping operation, the amount of metal removed is$? |
| A. | 0.005 to 0.01 mm |
| B. | 0.01 to 0.1 mm |
| C. | 0.05 to 0.1 mm |
| D. | 0.5 to 1 mm |
| Answer» B. 0.01 to 0.1 mm | |
| 607. |
The method of centre less grinding used to produce taper is$? |
| A. | In-feed grinding |
| B. | Through feed grinding |
| C. | End feed grinding |
| D. | Any one of these |
| Answer» D. Any one of these | |
| 608. |
Grinding wheels should be tested for balance$? |
| A. | Only at the time of manufacture |
| B. | Before starting the grinding operation |
| C. | At the end of grinding operation |
| D. | Occasionally |
| Answer» E. | |
| 609. |
The main purpose of spheroidising treatment is to improve$? |
| A. | Hardenability of low carbon steels |
| B. | Machinability of low carbon steels |
| C. | Hardenability of high carbon steels |
| D. | Machinability of high carbon steels |
| Answer» E. | |
| 610. |
In centerless grinders, the regulating wheel is inclined at$? |
| A. | 0° to 8° |
| B. | 9° to 15° |
| C. | 16° to 20° |
| D. | 21° to 25° |
| Answer» B. 9¬¨‚àû to 15¬¨‚àû | |
| 611. |
The rake angle required to machine brass by high speed steel tool is$? |
| A. | 0° |
| B. | 10° |
| C. | 20° |
| D. | 100° |
| Answer» B. 10¬¨‚àû | |
| 612. |
A push broach as compared to pull broach$? |
| A. | Has less number of teeth |
| B. | Is short and stocky |
| C. | Removes less material for each pass of the tool |
| D. | All of the above |
| Answer» E. | |
| 613. |
Dielectric is used in$? |
| A. | Electrochemical machining |
| B. | Ultrasonic machining |
| C. | Electro discharge machining |
| D. | Laser machining |
| Answer» D. Laser machining | |
| 614. |
The angle on which the strength of the tool depends is$? |
| A. | Rake angle |
| B. | Cutting angle |
| C. | Clearance angle |
| D. | Lip angle |
| Answer» B. Cutting angle | |
| 615. |
The crystal structure of austenite is$? |
| A. | Body centered cubic |
| B. | Base centered cubic |
| C. | Hexagonal closed packed |
| D. | Body centered tetragonal |
| Answer» B. Base centered cubic | |
| 616. |
Ceramic cutting tools are$? |
| A. | Made by cold pressing of aluminium oxide powder |
| B. | Available in the form of tips |
| C. | Brittle and have low bending strength |
| D. | All of these |
| Answer» E. | |
| 617. |
A feed gear box for a screw cutting lathe is designed on the basis of$? |
| A. | Geometric progression |
| B. | Arithmetic progression |
| C. | Harmonic progression |
| D. | None of these |
| Answer» B. Arithmetic progression | |
| 618. |
The floating position of the holding fixture in a rotary transfer device is used to$? |
| A. | Improve the accuracy of location |
| B. | Reduce the tendency to over-index |
| C. | Improve upon the acceleration and deceleration characteristics |
| D. | Reduce the cycle time |
| Answer» E. | |
| 619. |
A bottoming tap has$? |
| A. | Its end tapered for about three or four threads |
| B. | Its end tapered for about eight or ten threads |
| C. | Full threads for the whole of its length |
| D. | None of the above |
| Answer» D. None of the above | |
| 620. |
In down milling, the thickness of chip is$? |
| 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» C. Uniform throughout the cut | |
| 621. |
In a gating system, the ratio 1: 2: 4 represents$? |
| A. | Sprue base area: runner area: ingate area |
| B. | Pouring basin area: ingate area: runner area |
| C. | Sprue base area: ingate area: casting area |
| D. | Runner area: ingate area: casting area |
| Answer» B. Pouring basin area: ingate area: runner area | |
| 622. |
The lead screw of a lathe has _________ threads.$? |
| A. | Single start |
| B. | Double start |
| C. | Multi-start |
| D. | Any one of these |
| Answer» B. Double start | |
| 623. |
Cast iron during machining produces$? |
| A. | Continuous chips |
| B. | Discontinuous chips |
| C. | Continuous chips with built-up edge |
| D. | None of these |
| Answer» C. Continuous chips with built-up edge | |
| 624. |
In American Standard Association (ASA) system, if the tool nomenclature is 8-6-5-5-10-15-2 mm, then the side rake angle will be$? |
| A. | 5° |
| B. | 6° |
| C. | 8° |
| D. | 10° |
| Answer» C. 8¬¨‚àû | |
| 625. |
A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is$? |
| A. | Carburizing flame |
| B. | Oxidizing flame |
| C. | Oxy-acetylene flame |
| D. | Neutral flame |
| Answer» E. | |
| 626. |
When the shear angle is small$? |
| A. | Path of shear is short and chip is thin |
| B. | Path of shear is large and chip is thick |
| C. | Path of shear is short and chip is thick |
| D. | Path of shear is large and chip is thin |
| Answer» C. Path of shear is short and chip is thick | |
| 627. |
An expendable pattern is used in$? |
| A. | Slush casting |
| B. | Squeeze casting |
| C. | Centrifugal casting |
| D. | Investment casting |
| Answer» E. | |
| 628. |
The cutting speed for drilling copper with high speed steel drills varies from$? |
| A. | 10 to 20 m/min |
| B. | 18 to 30 m/min |
| C. | 24 to 45 m/min |
| D. | 60 to 90 m/min |
| Answer» C. 24 to 45 m/min | |
| 629. |
Lapping is an operation of$? |
| A. | Making a cone-shaped enlargement of the end of a hole |
| B. | Smoothing and squaring the surface around a hole |
| C. | Sizing and finishing a small diameter hole |
| D. | Producing a hole by removing metal along the circumference of a hollow cutting tool |
| Answer» D. Producing a hole by removing metal along the circumference of a hollow cutting tool | |
| 630. |
Internal gears can be made by$? |
| A. | Hobbing |
| B. | Shaping with pinion cutter |
| C. | Shaping with rack cutter |
| D. | Milling |
| Answer» C. Shaping with rack cutter | |
| 631. |
The percentage of carbon in gray cast iron is in the range of$? |
| A. | 0.25 to 0.75 percent |
| B. | 1.25 to 1.75 percent |
| C. | 3 to 4 percent |
| D. | 8 to 10 percent |
| Answer» D. 8 to 10 percent | |
| 632. |
Threading is an operation of$? |
| A. | Smoothing and squaring the surface around a hole |
| B. | Sizing and finishing a small diameter hole |
| C. | Producing a hole by removing metal along the circumference of a hollow cutting tool |
| D. | Cutting helical grooves on the external cylindrical surface |
| Answer» E. | |
| 633. |
Carbide tipped tools usually have$? |
| A. | Negative rake angle |
| B. | Positive rake angle |
| C. | Any rake angle |
| D. | No rake angle |
| Answer» B. Positive rake angle | |
| 634. |
During normalizing process of steel, the specimen is heated$? |
| A. | Between the upper and lower critical temperature and cooled in still air. |
| B. | Above the upper critical temperature and cooled in furnace. |
| C. | Above the upper critical temperature and cooled in still air. |
| D. | Between the upper and lower critical temperature and cooled in furnace. |
| Answer» D. Between the upper and lower critical temperature and cooled in furnace. | |
| 635. |
The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is$? |
| A. | Carbide, ceramic, cermet, borazon |
| B. | Ceramic, carbide, borazon, cermet |
| C. | Cermet, carbide, ceramic, borazon |
| D. | Borazon, ceramic, carbide, cermet |
| Answer» D. Borazon, ceramic, carbide, cermet | |
| 636. |
In ECM, the material removal is due to$? |
| A. | Corrosion |
| B. | Erosion |
| C. | Fusion |
| D. | Ion displacement |
| Answer» E. | |
| 637. |
In orthogonal turning of a low carbon steel bar of diameter 150 mm with uncoated carbide tool, the cutting velocity is 90 m/min. The feed is 0.24 mm/rev and the depth of cut is 2 mm. The chip thickness obtained is 0.48 mm. If the orthogonal rake angle is zero and the principle cutting edge angle is 90‚Äö√Ö‚àû, the shear angle in degree is$? |
| A. | 20.56 |
| B. | 26.56 |
| C. | 30.56 |
| D. | 36.56 |
| Answer» C. 30.56 | |
| 638. |
The abrasive recommended for grinding materials of low tensile strength is$? |
| A. | Silicon carbide |
| B. | Aluminium oxide |
| C. | Sand stone |
| D. | Diamond |
| Answer» B. Aluminium oxide | |
| 639. |
When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as$? |
| A. | Electrochemical machining |
| B. | Electro-discharge machining |
| C. | Ultrasonic machining |
| D. | None of these |
| Answer» C. Ultrasonic machining | |
| 640. |
In machining metals, chips break due to __________ of work material.$? |
| A. | Toughness |
| B. | Ductility |
| C. | Elasticity |
| D. | Work hardening |
| Answer» E. | |
| 641. |
Which of the following statement is correct for oblique cutting system?$? |
| A. | The cutting edge is inclined at an angle less than 90° with the normal to the velocity of the tool |
| B. | Frequently, more than one cutting edges are in action |
| C. | The chip flows on the tool face at an angle less than 90° with the normal on the cutting edge |
| D. | All of the above |
| Answer» E. | |
| 642. |
An operation of embossing a diamond shaped pattern on the surface of a workpiece, is known as$? |
| A. | Counter-boring |
| B. | Grooving |
| C. | Knurling |
| D. | Facing |
| Answer» D. Facing | |
| 643. |
The grinding operation is a$? |
| A. | Shaping operation |
| B. | Forming operation |
| C. | Surface finishing operation |
| D. | Dressing operation |
| Answer» D. Dressing operation | |
| 644. |
A ring gauge is used to measure$? |
| A. | Outside diameter but not roundness |
| B. | Roundness but not outside diameter |
| C. | Both outside diameter and roundness |
| D. | Only external threads |
| Answer» B. Roundness but not outside diameter | |
| 645. |
A twist drill is a$? |
| A. | Side cutting tool |
| B. | Front cutting tool |
| C. | End cutting tool |
| D. | None of these |
| Answer» D. None of these | |
| 646. |
In ECM, the material removal is due to? |
| A. | Corrosion |
| B. | Erosion |
| C. | Fusion |
| D. | Ion displacement |
| Answer» E. | |
| 647. |
The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is? |
| A. | Carbide, ceramic, cermet, borazon |
| B. | Ceramic, carbide, borazon, cermet |
| C. | Cermet, carbide, ceramic, borazon |
| D. | Borazon, ceramic, carbide, cermet |
| Answer» D. Borazon, ceramic, carbide, cermet | |
| 648. |
During normalizing process of steel, the specimen is heated? |
| A. | Between the upper and lower critical temperature and cooled in still air. |
| B. | Above the upper critical temperature and cooled in furnace. |
| C. | Above the upper critical temperature and cooled in still air. |
| D. | Between the upper and lower critical temperature and cooled in furnace. |
| Answer» D. Between the upper and lower critical temperature and cooled in furnace. | |
| 649. |
Carbide tipped tools usually have? |
| A. | Negative rake angle |
| B. | Positive rake angle |
| C. | Any rake angle |
| D. | No rake angle |
| Answer» B. Positive rake angle | |
| 650. |
In machining metals, chips break due to __________ of work material.? |
| A. | Toughness |
| B. | Ductility |
| C. | Elasticity |
| D. | Work hardening |
| Answer» E. | |