MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 4791 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 2601. |
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 | |
| 2602. |
The operation of making a cone-shaped enlargement of the end of a hole is known as |
| A. | counter-sinking |
| B. | counter-boring |
| C. | trepanning |
| D. | spot facing |
| Answer» B. counter-boring | |
| 2603. |
In drilling softer materials, the cutting speed is __________ as compared to harder materials. |
| A. | same |
| B. | low |
| C. | high |
| Answer» D. | |
| 2604. |
Which of the following parameters govern the value of shear angle in continuous chip formation? |
| A. | True feed |
| B. | Chip thickness |
| C. | Rake angle of the cutting tool |
| D. | all of these |
| Answer» E. | |
| 2605. |
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 | |
| 2606. |
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 | |
| 2607. |
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 to 30 | |
| 2608. |
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 | |
| 2609. |
Continuous chips with built up edge are formed during machining of |
| A. | brittle metals |
| B. | ductile metals |
| C. | hard metals |
| D. | soft metals |
| Answer» C. hard metals | |
| 2610. |
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 | |
| 2611. |
An open structure of a grinding wheel is denoted by the number 1 to 8. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 2612. |
In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be |
| A. | doubled |
| B. | halved |
| C. | quadrupled |
| D. | unchanged |
| Answer» B. halved | |
| 2613. |
The tool life is said to be over if |
| A. | poor surface finish is obtained |
| B. | there is sudden increase in cutting forces and power consumption |
| C. | overheating and fuming due to heat of friction starts |
| D. | all of the above |
| Answer» E. | |
| 2614. |
The rate of removing metal is __________ by increasing the depth of cut. |
| A. | decreased |
| B. | increased |
| Answer» C. | |
| 2615. |
The tool life is __________ cutting speed. |
| A. | independent of |
| B. | dependant upon |
| Answer» C. | |
| 2616. |
The method of grinding used to produce internal cylindrical holes and tapers, is |
| A. | internal cylindrical grinding |
| B. | form grinding |
| C. | external cylindrical grinding |
| D. | surface grinding |
| Answer» B. form grinding | |
| 2617. |
The time (in minutes) for a drilling a hole is given by where h is the |
| A. | length of the drill |
| B. | drill diameter |
| C. | flute length of the drill |
| D. | cone height of the drill |
| Answer» E. | |
| 2618. |
Crack in grinding wheel is developed due to |
| A. | high temperature developed at the contact of the wheel face and work |
| B. | grinding hard work |
| C. | low speed of wheel |
| D. | high speed of wheel |
| Answer» E. | |
| 2619. |
For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is |
| A. | 10 m/min |
| B. | 15 m/min |
| C. | 22 m/min |
| D. | 30 m/min |
| Answer» D. 30 m/min | |
| 2620. |
The vector sum of cutting velocity and chip velocity is __________ shear velocity. |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» B. less than | |
| 2621. |
For harder alloy steel, 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» D. any one of these | |
| 2622. |
It is desired to perform the operations like drilling, reaming, counter-boring etc. on a work piece. Which of the following machine will be used? |
| A. | Sensitive drilling machine |
| B. | Radial drilling machine |
| C. | Gang drilling machine |
| D. | Multiple spindle drilling machine |
| Answer» D. Multiple spindle drilling machine | |
| 2623. |
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. | |
| 2624. |
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 | |
| 2625. |
In drilling aluminium, a drill with |
| A. | zero helix angle is used |
| B. | low helix angle is used |
| C. | high helix angle is used |
| D. | any helix angle can be used |
| Answer» D. any helix angle can be used | |
| 2626. |
The cutting fluid mostly used for machining alloy steels is |
| A. | water |
| B. | soluble oil |
| C. | dry |
| D. | sulphurised mineral oil |
| Answer» E. | |
| 2627. |
The lathe spindles at the nose end have |
| A. | internal screw threads |
| B. | external screw threads |
| C. | no threads |
| D. | tapered threads |
| Answer» C. no threads | |
| 2628. |
The angle between the lathe centres is |
| A. | 30 |
| B. | 45 |
| C. | 60 |
| D. | 90 |
| Answer» D. 90 | |
| 2629. |
When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as |
| A. | electro-chemical machining |
| B. | electro-discharge machining |
| C. | ultra-sonic machining |
| D. | none of these |
| Answer» C. ultra-sonic machining | |
| 2630. |
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 microstructure of the tool material |
| D. | none of the above |
| Answer» B. grain size of the metal is small | |
| 2631. |
Cemented carbide tools are generally poor in shear. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 2632. |
A round nose tool has no back rake and side rake. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 2633. |
In electro-discharge machining, tool is made of |
| A. | brass |
| B. | copper |
| C. | copper tungsten alloy |
| D. | all of these |
| Answer» E. | |
| 2634. |
A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through-hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is |
| A. | 0.2 mm |
| B. | 10 mm |
| C. | 20 mm |
| D. | 100 mm |
| Answer» D. 100 mm | |
| 2635. |
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 | |
| 2636. |
A broach has |
| A. | roughing teeth |
| B. | semi-finishing teeth |
| C. | finishing teeth |
| D. | all of these |
| Answer» E. | |
| 2637. |
In order to obtain a surface finish in the range of 0.75 m to 1.25 m , the operation used is called. |
| A. | grinding |
| B. | lapping |
| C. | honing |
| D. | buffing |
| Answer» B. lapping | |
| 2638. |
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. | |
| 2639. |
Which of the following statement is correct as regard to up 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. | |
| 2640. |
The tail stock and the carriage of a lathe may be guided on same or different guideway. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2641. |
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» D. tool rake angle | |
| 2642. |
Surface grinding is done to produce |
| A. | tapered surface |
| B. | flat surface |
| C. | internal cylindrical holes |
| D. | all of these |
| Answer» C. internal cylindrical holes | |
| 2643. |
Gear finishing operation is called |
| A. | shaping |
| B. | milling |
| C. | hobbing |
| D. | burnishing |
| Answer» E. | |
| 2644. |
The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called |
| A. | helix or rake angle |
| B. | point angle |
| C. | chisel edge angle |
| D. | lip clearance angle |
| Answer» D. lip clearance angle | |
| 2645. |
In American Standard Association (A S A) 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 | |
| 2646. |
In machining metal, cutting force at the cutting edge is measured by a |
| A. | wattmeter |
| B. | dynamometer |
| C. | hydrometer |
| D. | pyrometer |
| Answer» C. hydrometer | |
| 2647. |
With the same tool life, the maximum material per minute is removed by |
| A. | increasing the cutting speed |
| B. | decreasing the cutting speed |
| C. | increasing the depth of cut |
| D. | increasing the feed rate |
| Answer» D. increasing the feed rate | |
| 2648. |
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 | |
| 2649. |
The process of removing metal by a cutter which is rotated against the direction of travel of workpiece, is called |
| A. | up milling |
| B. | down milling |
| C. | face milling |
| D. | end milling |
| Answer» B. down milling | |
| 2650. |
The tailstock set over required to turn a taper on the entire length of a workpiece having diameters D and d is |
| A. | <img src="/_files/images/mechanical-engineering/production-engineering/706-154-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/production-engineering/706-154-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/production-engineering/706-154-3.png"> |
| D. | D - d |
| Answer» D. D - d | |