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.
| 2851. |
A process of removing metal by pushing or pulling a cutting tool is called |
| A. | up milling |
| B. | down milling |
| C. | forming |
| D. | broaching |
| Answer» E. | |
| 2852. |
The cutting speed is minimum while machining __________ with a high speed steel tool. |
| A. | cast iron |
| B. | mild steel |
| C. | brass |
| D. | aluminium |
| Answer» B. mild steel | |
| 2853. |
The swing diameter over the bed is __________ the height of the centre measured from the bed of the lathe. |
| A. | equal to |
| B. | twice |
| C. | thrice |
| D. | one-half |
| Answer» C. thrice | |
| 2854. |
In grinding irregular, curved, tapered, convex and concave surfaces, the grinder used is |
| A. | cylindrical grinder |
| B. | internal grinder |
| C. | surface grinder |
| D. | tool and cutter grinder |
| Answer» D. tool and cutter grinder | |
| 2855. |
Down milling is also called |
| A. | conventional milling |
| B. | climb milling |
| C. | end milling |
| D. | face milling |
| Answer» C. end milling | |
| 2856. |
Larger than 15 side cutting edge angle |
| A. | increases tool life |
| B. | decreases tool life |
| C. | produces chipping and decreases tool life |
| D. | results in excessive stress concentration and greater heat generation |
| Answer» D. results in excessive stress concentration and greater heat generation | |
| 2857. |
Which of the following statement is correct for orthogonal cutting system? |
| A. | The cutting edge of the tool is perpendicular to the direction of tool travel. |
| B. | The cutting edge clears the width of the workpiece on either ends. |
| C. | The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge. |
| D. | all of the above |
| Answer» E. | |
| 2858. |
Glazing in grinding wheels can be decreased by |
| A. | using a harder wheel or by increasing the wheel speed |
| B. | using a softer wheel or by decreasing the wheel speed |
| C. | using a harder wheel or by decreasing the wheel speed |
| D. | using a softer wheel or by increasing the wheel speed |
| Answer» C. using a harder wheel or by decreasing the wheel speed | |
| 2859. |
Back rake angle of a single point tool is the angle by which the face of the tool is inclined towards back. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 2860. |
As the cutting speed increases, tool life decreases. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 2861. |
In metal machining, the work-tool contact zone is a zone where heat is generated due to |
| A. | plastic deformation of metal |
| B. | burnishing friction |
| C. | friction between the moving chip and the tool face |
| D. | none of the above |
| Answer» C. friction between the moving chip and the tool face | |
| 2862. |
Thread grinding requires work speed from |
| A. | 1 to 3 m/min |
| B. | 5 to 10 m/min |
| C. | 10 to 14 m/min |
| D. | 14 to 20 m/min |
| Answer» B. 5 to 10 m/min | |
| 2863. |
The abrasive recommended for grinding materials of high tensile strength is |
| A. | silicon carbide |
| B. | aluminium oxide |
| C. | sand stone |
| D. | diamond |
| Answer» C. sand stone | |
| 2864. |
The relation between tool life (T) and cutting speed (V) is VTn = Constant. In this relation, the value of n depends upon |
| A. | work material |
| B. | tool material |
| C. | working conditions |
| D. | type of chip produced |
| Answer» C. working conditions | |
| 2865. |
In order to grind soft material |
| A. | coarse grained grinding wheel is used |
| B. | fine grained grinding wheel is used |
| C. | medium grained grinding wheel is used |
| D. | any one of these |
| Answer» B. fine grained grinding wheel is used | |
| 2866. |
Any number of equal divisions can be obtained on milling machine by |
| A. | direct indexing |
| B. | simple indexing |
| C. | compound indexing |
| D. | differential indexing |
| Answer» C. compound indexing | |
| 2867. |
The angle made by the face of the tool and the plane parallel to the base of cutting tool is called |
| A. | rake angle |
| B. | cutting angle |
| C. | clearance angle |
| D. | lip angle |
| Answer» B. cutting angle | |
| 2868. |
Crater wear is predominant in |
| A. | carbon tool steels |
| B. | tungsten carbide tools |
| C. | high speed steel tools |
| D. | ceramic tools |
| Answer» C. high speed steel tools | |
| 2869. |
Carbon tool steels have low-heat and wear-resistance. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 2870. |
Trepanning 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» E. | |
| 2871. |
Which of the following statement is correct regarding grinding of high carbon steel? |
| A. | Grinding at high speed results in the reduction of chip thickness and cutting forces per grit. |
| B. | Aluminium oxide wheels are employed. |
| C. | The grinding wheel has to be of open structure. |
| D. | all of the above |
| Answer» E. | |
| 2872. |
The rear teeth of a broach |
| A. | perform burnishing operation |
| B. | remove minimum metal |
| C. | remove maximum metal |
| D. | remove no metal |
| Answer» D. remove no metal | |
| 2873. |
In a shaper, the length of stroke is increased by |
| A. | increasing the centre distance of bull gear and crank pin |
| B. | decreasing the centre distance of bull gear and crank pin |
| C. | increasing the length of the arm |
| D. | decreasing the length of the slot in the slotted lever |
| Answer» B. decreasing the centre distance of bull gear and crank pin | |
| 2874. |
The method of centreless grinding used to produce taper is |
| A. | infeed grinding |
| B. | through feed grinding |
| C. | endfeed grinding |
| D. | any one of these |
| Answer» D. any one of these | |
| 2875. |
High speed steel drills can be operated at about __________ the speed of high carbon steel drills. |
| A. | one-half |
| B. | one-fourth |
| C. | double |
| D. | four times |
| Answer» D. four times | |
| 2876. |
When the end of a tap is tapered for about three or four threads, it is known as a |
| A. | taper tap |
| B. | bottoming tap |
| C. | second tap |
| D. | none of these |
| Answer» D. none of these | |
| 2877. |
In continuous chip cutting, the maximum heat is taken by the cutting tool. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 2878. |
In metal cutting, use of low feeds and high cutting speeds is desired when the objective is |
| A. | high metal removal rate |
| B. | dry machining |
| C. | use of soft cutting tool |
| D. | surface finish |
| Answer» E. | |
| 2879. |
In case of turning, as the machining proceeds, the spindle speed must __________ with the decrease in diameter of work. |
| A. | decrease |
| B. | increase |
| Answer» C. | |
| 2880. |
The hardness of a grinding wheel is specified by |
| A. | Brinell hardness number |
| B. | Rockwel! hardness number |
| C. | Vickers pyramid number |
| D. | letter of alphabet |
| Answer» E. | |
| 2881. |
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. | |
| 2882. |
In centreless grinding, the surface speed of regulating wheel is |
| A. | 5 to 15 m/min |
| B. | 15 to 60 m/min |
| C. | 60 to 90 m/min |
| D. | 90 to 120 m/min |
| Answer» C. 60 to 90 m/min | |
| 2883. |
The factor responsible for the formation of continuous chips with built up edge is |
| A. | low cutting speed and large rake angle |
| B. | low cutting speed and small rake angle |
| C. | high cutting speed and large rake angle |
| D. | high cutting speed and small rake angle |
| Answer» C. high cutting speed and large rake angle | |
| 2884. |
An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is |
| A. | cutting speed |
| B. | feed rate |
| C. | shear angle |
| D. | tool geometry |
| Answer» D. tool geometry | |
| 2885. |
The high cutting speed and large rake angle of the tool will result in the formation of |
| A. | continuous chips |
| B. | discontinuous chip |
| C. | continuous chips with built up edge |
| D. | none of these |
| Answer» B. discontinuous chip | |
| 2886. |
The tool life, in case of continuous cutting, is much better than intermittent cutting. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 2887. |
The main purpose of a boring operation, as compared to drilling, is to |
| A. | drill a hole |
| B. | finish the drilled hole |
| C. | correct the hole |
| D. | enlarge the existing hole |
| Answer» E. | |
| 2888. |
The helix angle of a drill is __________ for drilling brass. |
| A. | equal to 30 |
| B. | less than 30 |
| C. | more than 30 |
| Answer» C. more than 30 | |
| 2889. |
Which of the following operations is carried out at a minimum cutting velocity if the machines are equally rigid and the tool work materials are the same? |
| A. | Turning |
| B. | Grinding |
| C. | Boring |
| D. | Milling |
| Answer» E. | |
| 2890. |
Ceramic tools are fixed to tool body by |
| A. | soldering |
| B. | brazing |
| C. | welding |
| D. | clamping |
| Answer» C. welding | |
| 2891. |
The efficiency of Diesel cycle depends upon |
| A. | temperature limits |
| B. | pressure ratio |
| C. | compression ratio |
| D. | cut-off ratio and compression ratio |
| Answer» E. | |
| 2892. |
To grind brittle materials, a coarse grained grinding wheel is used. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 2893. |
The factor responsible for the formation of discontinuous chips is |
| A. | low cutting speed and large rake angle |
| B. | low cutting speed and small rake angle |
| C. | high cutting speed and large rake angle |
| D. | high cutting speed and small rake angle |
| Answer» C. high cutting speed and large rake angle | |
| 2894. |
The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is |
| A. | 3.75 m/min |
| B. | 5 m/min |
| C. | 7.5 m/min |
| D. | 15 m/min |
| Answer» D. 15 m/min | |
| 2895. |
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 | |
| 2896. |
The free expansion process is __________ non-flow process. |
| A. | reversible |
| B. | irreversible |
| Answer» C. | |
| 2897. |
Those substances which have so far not been resolved by any means into other substances of simpler form are called |
| A. | elements |
| B. | compounds |
| C. | atoms |
| D. | molecules |
| Answer» B. compounds | |
| 2898. |
The heating and expanding of a gas is called thermodynamic system. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 2899. |
The gas constant (R) is equal to the __________ of two specific heats. |
| A. | sum |
| B. | difference |
| C. | product |
| D. | ratio |
| Answer» C. product | |
| 2900. |
The measurement of a thermodynamic property known as temperature is based on |
| A. | Zeroth law of thermodynamics |
| B. | First law of thermodynamics |
| C. | Second law of thermodynamics |
| D. | none of these |
| Answer» B. First law of thermodynamics | |