MCQOPTIONS
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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.
| 2651. |
The chamfering is an operation of |
| A. | bevelling the extreme end of a workpiece |
| B. | embossing a diamond shaped pattern on the surface of a workpiece |
| C. | reducing the diameter of a workpiece over a very narrow surface |
| D. | enlarging the end of a hole cylindrically |
| Answer» B. embossing a diamond shaped pattern on the surface of a workpiece | |
| 2652. |
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 | |
| 2653. |
The grinding of long, slender shafts or bars is usually done by |
| A. | infeed grinding |
| B. | through feed grinding |
| C. | endfeed grinding |
| D. | any one of these |
| Answer» C. endfeed grinding | |
| 2654. |
The factor considered for evaluation of machinability is |
| A. | cutting forces and power consumption |
| B. | tool life |
| C. | type of chips and shear angle |
| D. | all of these |
| Answer» E. | |
| 2655. |
In centreless grinding, work place centre will be |
| A. | above the line joining the two wheel centres |
| B. | below the line joining the two wheel centres |
| C. | on the line joining the two wheel centres |
| D. | at the intersection of the line joining the wheel centres with the work place plane |
| Answer» B. below the line joining the two wheel centres | |
| 2656. |
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 | |
| 2657. |
In oblique cutting system, the tool may or may not generate a surface parallel to the workface. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 2658. |
The plunge grinding requires very __________ speed. |
| A. | high |
| B. | low |
| Answer» C. | |
| 2659. |
A tool used to withdraw a drill from the sleeve is called |
| A. | drill remover |
| B. | drill puller |
| C. | drift |
| D. | drill drawer |
| Answer» D. drill drawer | |
| 2660. |
The cutting fluid mostly used for machining steel is |
| A. | water |
| B. | soluble oil |
| C. | dry |
| D. | heavy oils |
| Answer» C. dry | |
| 2661. |
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 | |
| 2662. |
The dressing and truing of grinding wheel are done with the same tools but not for the same purpose. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 2663. |
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. | |
| 2664. |
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 | |
| 2665. |
The cutting speed for drilling aluminium, brass and bronze 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» E. | |
| 2666. |
Flank wear depends upon the |
| A. | hardness of the work and tool material at the operating temperature |
| B. | amount and distribution of hard constituents in the work material |
| C. | degree of strain hardening in the chip |
| D. | all of these |
| Answer» C. degree of strain hardening in the chip | |
| 2667. |
The process of removing metal by a cutter which is rotated in the same direction of travel of workpiece, is called |
| A. | up milling |
| B. | down milling |
| C. | face milling |
| D. | end milling |
| Answer» C. face milling | |
| 2668. |
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 | |
| 2669. |
In conventional milling, the cutting force tends to lift the work. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2670. |
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 | |
| 2671. |
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. | |
| 2672. |
Crater wear leads to |
| A. | increase in cutting temperature |
| B. | weakening of tool |
| C. | friction and cutting forces |
| D. | all of these |
| Answer» E. | |
| 2673. |
In drilling mild steel and brass, the point angle of a drill is 118 . |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2674. |
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. | |
| 2675. |
The tail stock set over method of taper turning is preferred for |
| A. | internal tapers |
| B. | small tapers |
| C. | long slender tapers |
| D. | steep tapers |
| Answer» D. steep tapers | |
| 2676. |
The addition of lead, sulphur and phosphorus to low carbon steels, help to |
| A. | reduce built up edge |
| B. | break up chips |
| C. | improve machinability |
| D. | all of these |
| Answer» E. | |
| 2677. |
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. | |
| 2678. |
The tool life in case of a grinding wheel is the time |
| A. | between two successive regrinds of the wheel |
| B. | taken for the wheel to be balanced |
| C. | taken between two successive wheel dressings |
| D. | taken for a wear of 1 mm on its diameter |
| Answer» D. taken for a wear of 1 mm on its diameter | |
| 2679. |
The chuck preferred for quick setting and accurate centering of a job is |
| A. | four jaw independent chuck |
| B. | collect chuck |
| C. | three jaw universal chuck |
| D. | magnetic chuck |
| Answer» C. three jaw universal chuck | |
| 2680. |
Negative rakes are used for |
| A. | carbide tools |
| B. | heavy loads |
| C. | harder materials |
| D. | all of these |
| Answer» E. | |
| 2681. |
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 | |
| 2682. |
Glazing in grinding wheels __________ cutting capacity. |
| A. | has no effect on |
| B. | increase |
| C. | decrease |
| Answer» D. | |
| 2683. |
The usual value of the helix angle of a drill is |
| A. | 20 |
| B. | 30 |
| C. | 45 |
| D. | 60 |
| Answer» C. 45 | |
| 2684. |
The enlarging of an existing circular hole with a rotating single point tool is called |
| A. | boring |
| B. | drilling |
| C. | reaming |
| D. | internal turning |
| Answer» B. drilling | |
| 2685. |
In the relation VTn = C, the value of n for high speed steel tools varies from 0.25 to 0.40. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 2686. |
Jigs are heavier than fixtures in construction. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 2687. |
In electro-chemical machining, the gap between the tool and work is kept as |
| A. | 0.1 mm |
| B. | 0.25 mm |
| C. | 0.4 mm |
| D. | 0.75 mm |
| Answer» E. | |
| 2688. |
The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is __________ cutting speed for drilling mild steel with high speed steel drills. |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» B. less than | |
| 2689. |
In electro-discharge machining, the tool is connected to cathode. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 2690. |
Half nut is used to lock the lathe carriage to the lead screw for thread cutting. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2691. |
The process of improving the cutting action of the grinding wheel is called |
| A. | truing |
| B. | dressing |
| C. | facing |
| D. | clearing |
| Answer» C. facing | |
| 2692. |
The tool life __________ as the cutting speed increases. |
| A. | decreases |
| B. | increases |
| Answer» B. increases | |
| 2693. |
The infeed grinding is used to |
| A. | produce tapers |
| B. | grind shoulders and formed surfaces |
| C. | grind long, slender shafts or bars |
| D. | ail of these |
| Answer» C. grind long, slender shafts or bars | |
| 2694. |
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. | |
| 2695. |
If the grain size is __________ the tool life is better. |
| A. | smaller |
| B. | larger |
| Answer» C. | |
| 2696. |
In oblique cutting system, the cutting edge of the tool |
| A. | may clear the width of the workpiece |
| B. | may or may not clear the width of the workpiece |
| C. | may not clear the width of the workpiece |
| D. | should always clear the width of the workpiece |
| Answer» D. should always clear the width of the workpiece | |
| 2697. |
Flank wear is due to the abrasive action of hard mis-constituents including debris from built up edge as the work material rubs the work surface. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 2698. |
In gear hobbing |
| A. | only hob rotates |
| B. | only gear blank rotates |
| C. | both hob and gear blank rotates |
| D. | neither hob nor gear blank rotates |
| Answer» D. neither hob nor gear blank rotates | |
| 2699. |
A lathe with four steps on the cone pulley and with backgears will have |
| A. | four direct speeds |
| B. | four indirect speeds |
| C. | four direct and four indirect speeds |
| D. | eight indirect speeds |
| Answer» D. eight indirect speeds | |
| 2700. |
In transverse grinding |
| A. | the work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face |
| B. | the work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face |
| C. | the work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face |
| D. | the work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face |
| Answer» B. the work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face | |