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.
| 651. |
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 | |
| 652. |
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 | |
| 653. |
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 | |
| 654. |
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 | |
| 655. |
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. | |
| 656. |
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 | |
| 657. |
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 | |
| 658. |
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 | |
| 659. |
For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is? |
| A. | 5 m/min |
| B. | 10 m/min |
| C. | 15 m/min |
| D. | 30 m/min |
| Answer» E. | |
| 660. |
The work or surface speed for cylindrical grinding varies from? |
| A. | 5 to 10 m/min |
| B. | 10 to 20 m/min |
| C. | 20 to 30 m/min |
| D. | 40 to 60 m/min |
| Answer» D. 40 to 60 m/min | |
| 661. |
The tap used to cut threads in a blind hole is? |
| A. | Taper tap |
| B. | Second tap |
| C. | Bottoming tap |
| D. | Any one of these |
| Answer» D. Any one of these | |
| 662. |
Which of the following engineering materials is the most suitable candidate for hot chamber die casting?? |
| A. | Low carbon steel |
| B. | Titanium |
| C. | Copper |
| D. | Tin |
| Answer» E. | |
| 663. |
In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done in all the positions i.e. flat position, vertical position or inclined position.? |
| A. | Globular transfer |
| B. | Spray transfer |
| C. | GMAW practice |
| D. | Dip transfer |
| Answer» D. Dip transfer | |
| 664. |
In reaming process? |
| A. | Metal removal rate is high |
| B. | High surface finish is obtained |
| C. | High form accuracy is obtained |
| D. | High dimensional accuracy is obtained |
| Answer» D. High dimensional accuracy is obtained | |
| 665. |
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 | |
| 666. |
The grinding operation is a? |
| A. | Shaping operation |
| B. | Forming operation |
| C. | Surface finishing operation |
| D. | Dressing operation |
| Answer» D. Dressing operation | |
| 667. |
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 | |
| 668. |
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 | |
| 669. |
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. | |
| 670. |
The actual feed in centerless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of wheel)? |
| A. | πd |
| B. | πdn |
| C. | πdn sinα |
| D. | πdn cosα |
| Answer» D. ≈ì√Ñdn cos≈í¬± | |
| 671. |
In which of the following machine, the work is usually rotated while the drill is fed into work?? |
| A. | Sensitive drilling machine |
| B. | Radial drilling machine |
| C. | Gang drilling machine |
| D. | Deep hole drilling machine |
| Answer» E. | |
| 672. |
In a planer? |
| A. | Tool is stationary and work reciprocates |
| B. | Work is stationary and tool reciprocates |
| C. | Tool moves over stationary work |
| D. | Tool moves over reciprocating work |
| Answer» B. Work is stationary and tool reciprocates | |
| 673. |
Soft materials can not be economically ground due to? |
| A. | High temperature involved |
| B. | Frequent wheel clogging |
| C. | Rapid wheel wear |
| D. | Low work piece stiffness |
| Answer» C. Rapid wheel wear | |
| 674. |
What is the type of welding defect caused due to poor deposition of weld rod is called?? |
| A. | Porosity |
| B. | Undercut |
| C. | Under fill |
| D. | Crack |
| Answer» B. Undercut | |
| 675. |
The tool may fail due to? |
| A. | Cracking at the cutting edge due to thermal stresses |
| B. | Chipping of the cutting edge |
| C. | Plastic deformation of the cutting edge |
| D. | All of these |
| Answer» E. | |
| 676. |
Jigs are used? |
| A. | For holding and guiding the tool in drilling, reaming or tapping operations |
| B. | For holding the work in milling, grinding, planing or turning operations |
| C. | To check the accuracy of workpiece |
| D. | None of the above |
| Answer» B. For holding the work in milling, grinding, planing or turning operations | |
| 677. |
The average cutting speed for turning mild steel with a high speed steel tool is? |
| A. | 15 to 19 m/min |
| B. | 25 to 31 m/min |
| C. | 60 to 90 m/min |
| D. | 90 to 120 m/min |
| Answer» C. 60 to 90 m/min | |
| 678. |
Fixtures are used? |
| A. | For holding and guiding the tool in drilling, reaming or tapping operations |
| B. | For holding the work in milling, grinding, planing or turning operations |
| C. | To check the accuracy of workpiece |
| D. | None of the above |
| Answer» C. To check the accuracy of workpiece | |
| 679. |
In centre less grinders, the maximum angular adjustment of the regulating wheel is? |
| A. | 5° |
| B. | 10° |
| C. | 15° |
| D. | 20° |
| Answer» C. 15¬¨‚àû | |
| 680. |
A dynamo-meter is a device used for the measurement of? |
| A. | Chip thickness ratio |
| B. | Forces during metal cutting |
| C. | Wear of the cutting tool |
| D. | Deflection of the cutting tool |
| Answer» C. Wear of the cutting tool | |
| 681. |
In a particular type of welding, flux is prepared in the form of a coarse powder and granulated flux is spread over the joint. What is this type of welding process called?? |
| A. | Electric arc welding |
| B. | Submerged arc welding |
| C. | MIG welding |
| D. | TIG welding |
| Answer» C. MIG welding | |
| 682. |
The usual value of the helix angle of a drill is? |
| A. | 20° |
| B. | 30° |
| C. | 45° |
| D. | 60° |
| Answer» C. 45¬¨‚àû | |
| 683. |
The parameter which completely defines the chip formation in a metal cutting process is? |
| A. | Shear angle |
| B. | Chip-tool contact length |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» D. None of these | |
| 684. |
Relief angles on high speed steel tools usually vary from? |
| A. | 0° to 3° |
| B. | 3° to 10° |
| C. | 10° to 20° |
| D. | 20° to 30° |
| Answer» E. | |
| 685. |
For generating a Coon’s surface we require? |
| A. | A set of grid points on the surface |
| B. | A set of grid control points |
| C. | Four bounding curves defining the surface |
| D. | Two bounding curves and a set of grid control points |
| Answer» D. Two bounding curves and a set of grid control points | |
| 686. |
An expendable pattern is used in? |
| A. | Slush casting |
| B. | Squeeze casting |
| C. | Centrifugal casting |
| D. | Investment casting |
| Answer» E. | |
| 687. |
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 | |
| 688. |
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. | |
| 689. |
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 | |
| 690. |
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 | |
| 691. |
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 | |
| 692. |
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. | |
| 693. |
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. | |
| 694. |
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 | |
| 695. |
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 | |
| 696. |
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 | |
| 697. |
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 | |
| 698. |
The type of reamer used for reaming operation in a blind hole, is |
| A. | Straight fluted reamer |
| B. | Left hand spiral fluted reamer |
| C. | Right hand spiral fluted reamer |
| D. | Any one of these |
| Answer» D. Any one of these | |
| 699. |
The cutting speed is maximum while machining _________ with a high speed steel tool. |
| A. | Cast iron |
| B. | Mild steel |
| C. | Brass |
| D. | Aluminium |
| Answer» E. | |
| 700. |
The broaching operation in which either the work or the tool moves across the other, is known as |
| A. | Pull broaching |
| B. | Push broaching |
| C. | Surface broaching |
| D. | Continuous broaching |
| Answer» D. Continuous broaching | |