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.
| 751. |
Green sand mould indicates that |
| A. | Polymeric mould has been cured |
| B. | Mould has been totally dried |
| C. | Mould is green in colour |
| D. | Mould contains moisture |
| Answer» E. | |
| 752. |
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 | |
| 753. |
A mandrel is used to hold |
| A. | An eccentric work |
| B. | A heavy work |
| C. | A thin work |
| D. | None of these |
| Answer» E. | |
| 754. |
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 | |
| 755. |
The abrasive slurry used in ultrasonic machining contains fine particles of |
| A. | Aluminium oxide |
| B. | Boron carbide |
| C. | Silicon carbide |
| D. | Any one of these |
| Answer» E. | |
| 756. |
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 | |
| 757. |
Which of the following statement is incorrect with reference of lathe cutting tools? |
| A. | The flank of the tool is the surface or surfaces below and adjacent to the cutting edges |
| B. | The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges |
| C. | The heel is that part of the tool which is shaped to produce the cutting edges and face |
| D. | The base is that surface of the shank which bears against the support and takes tangent pressure of the cut |
| Answer» D. The base is that surface of the shank which bears against the support and takes tangent pressure of the cut | |
| 758. |
Gear lapping is an operation |
| A. | After heat treatment |
| B. | Prior to heat treatment |
| C. | For gear reconditioning |
| D. | None of these |
| Answer» B. Prior to heat treatment | |
| 759. |
The lip clearance angle is the angle formed by the |
| A. | Leading edge of the land with a plane having the axis of the drill |
| B. | Flank and a plane at right angles to the drill axis |
| C. | Chisel edge and the lip as viewed from the end of a drill |
| D. | None of the above |
| Answer» C. Chisel edge and the lip as viewed from the end of a drill | |
| 760. |
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 | |
| 761. |
The silicon carbide abrasive is chiefly used for grinding |
| A. | Cemented carbide |
| B. | Ceramic |
| C. | Cast iron |
| D. | All of these |
| Answer» E. | |
| 762. |
The trade name of a nonferrous cast alloy composed of cobalt, chromium and tungsten is called |
| A. | Ceramic |
| B. | Stellite |
| C. | Diamond |
| D. | Cemented carbide |
| Answer» C. Diamond | |
| 763. |
The point angle of a drill, for drilling stainless steel, is |
| A. | 90° |
| B. | 118° |
| C. | 135° |
| D. | 150° |
| Answer» D. 150¬¨‚àû | |
| 764. |
Internal or external threads of different pitches can be produced by |
| A. | Pantograph milling machine |
| B. | Profiling machine |
| C. | Planetary milling machine |
| D. | Piano miller |
| Answer» D. Piano miller | |
| 765. |
The top and sides of the table of a shaper usually have |
| A. | L-type slots |
| B. | T-type slots |
| C. | I-type slots |
| D. | Any one of these |
| Answer» C. I-type slots | |
| 766. |
Tool signature consists of __________ elements. |
| A. | Two |
| B. | Four |
| C. | Five |
| D. | Seven |
| Answer» E. | |
| 767. |
The type of tool used on milling machine and broaching machine is |
| A. | Single point cutting tool |
| B. | Two point cutting tool |
| C. | Three point cutting tool |
| D. | Multi-point cutting tool |
| Answer» E. | |
| 768. |
The hardness of a grinding wheel is determined by the |
| A. | Hardness of abrasive grains |
| B. | Ability of the bond to retain abrasives |
| C. | Hardness of the bond |
| D. | Ability of the grinding wheel to penetrate the work piece |
| Answer» C. Hardness of the bond | |
| 769. |
Glazing in grinding wheels __________ cutting capacity. |
| A. | Has no effect on |
| B. | Increase |
| C. | Decrease |
| D. | None of these |
| Answer» D. None of these | |
| 770. |
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 | |
| 771. |
If a particular Fe-C alloy contains less than 0.83% carbon, it is called |
| A. | High speed steel |
| B. | Hypo eutectoid steel |
| C. | Hyper eutectoid steel |
| D. | Cast iron |
| Answer» C. Hyper eutectoid steel | |
| 772. |
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 | |
| 773. |
In electro discharge machining, tool is made of |
| A. | Brass |
| B. | Copper |
| C. | Copper tungsten alloy |
| D. | All of these |
| Answer» E. | |
| 774. |
The carbide tools operating at very low cutting speeds (below 30 m/min) |
| A. | Reduces tool life |
| B. | Increases tool life |
| C. | Have no effect on tool life |
| D. | Spoils the work piece |
| Answer» B. Increases tool life | |
| 775. |
Small nose radius |
| 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» E. | |
| 776. |
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 | |
| 777. |
A lead-screw with half nuts in a lathe, free to rotate in both directions has |
| A. | V-threads |
| B. | Whitworth threads |
| C. | Buttress threads |
| D. | Acme threads |
| Answer» E. | |
| 778. |
In ultrasonic machining, the metal is removed by |
| A. | Using abrasive slurry between the tool and work |
| B. | Direct contact of tool with the work |
| C. | Maintaining an electrolyte between the work and tool in a very small gap between the two |
| D. | Erosion caused by rapidly recurring spark discharges between the tool and work |
| Answer» B. Direct contact of tool with the work | |
| 779. |
The primary purpose of a sprue in a casting mould is to |
| A. | Feed the casting at a rate consistent with the rate of solidification |
| B. | Act as a reservoir for molten metal |
| C. | Feed molten metal from the pouring basin to the gate |
| D. | Help feed the casting until all solidification takes place |
| Answer» D. Help feed the casting until all solidification takes place | |
| 780. |
What is the type of joining process called, where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained? |
| A. | Ultrasonic welding |
| B. | Forge welding |
| C. | Electron beam welding |
| D. | Friction welding |
| Answer» E. | |
| 781. |
In machining metals, surface roughness is due to |
| A. | Feed marks or ridges left by the cutting tool |
| B. | Fragment of built-up edge on the machined surface |
| C. | Cutting tool vibrations |
| D. | All of these |
| Answer» E. | |
| 782. |
What is the method of brazing used to join relatively small assemblies made from materials that either do not oxidize at the brazing temperature or can be protected from oxidation with a flux? |
| A. | Torch brazing |
| B. | Dip brazing |
| C. | Resistance brazing |
| D. | Furnace brazing |
| Answer» B. Dip brazing | |
| 783. |
In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to |
| A. | Circular interpolation in counter clockwise direction and incremental dimension |
| B. | Circular interpolation in counter clockwise direction and absolute dimension |
| C. | Circular interpolation in clockwise direction and incremental dimension |
| D. | Circular interpolation in clockwise direction and absolute dimension |
| Answer» D. Circular interpolation in clockwise direction and absolute dimension | |
| 784. |
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 | |
| 785. |
Segmental chips are formed during machining |
| A. | Mild steel |
| B. | Cast iron |
| C. | High speed steel |
| D. | High carbon steel |
| Answer» C. High speed steel | |
| 786. |
A diamond locating pin is used in jigs and fixtures because |
| A. | Diamond is very hard and wear resistant |
| B. | It occupies very little space |
| C. | It helps in assembly with tolerance on centre distance |
| D. | It has a long life |
| Answer» D. It has a long life | |
| 787. |
Gear burnishing is a process for |
| A. | Surface finishing |
| B. | Undercut gears |
| C. | Cycloidal gears |
| D. | Removing residual stresses from teeth roots |
| Answer» B. Undercut gears | |
| 788. |
Which one of the following is a solid state joining process? |
| A. | Gas tungsten arc welding |
| B. | Resistance spot welding |
| C. | Friction welding |
| D. | Submerged arc welding |
| Answer» D. Submerged arc welding | |
| 789. |
The example of snag grinding is |
| A. | Trimming the surface left by spruces and risers on castings |
| B. | Grinding the parting line left on castings |
| C. | Removing flash on forgings |
| D. | All of these |
| Answer» E. | |
| 790. |
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. | |
| 791. |
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. | |
| 792. |
Volume of a cube of side ‘l’ and volume of a sphere of radius ‘r’ are equal. Both the cube and the sphere are solid and of same material. They are being cast. The ratio of the solidification time of the cube to the same of the sphere is# |
| A. | (4π/6)³ × (r/l)⁶ |
| B. | (4π/6) × (r/l)² |
| C. | (4π/6)² × (r/l)³ |
| D. | (4π/6)² × (r/l)⁴ |
| Answer» E. | |
| 793. |
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 | |
| 794. |
What is the welding defect caused due to improper control and poor removal of slog between passes called? |
| A. | Mismatch |
| B. | Under fill |
| C. | Crack |
| D. | Porosity |
| Answer» C. Crack | |
| 795. |
Cold working of steel is defined as working |
| A. | At its recrystallisation temperature |
| B. | Above its recrystallisation temperature |
| C. | Below its recrystallisation temperature |
| D. | At two thirds of the melting temperature of the metal |
| Answer» D. At two thirds of the melting temperature of the metal | |
| 796. |
The average cutting speed for turning brass 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» D. 90 to 120 m/min | |
| 797. |
The soft grade grinding wheels are denoted by the letters |
| A. | A to H |
| B. | I to P |
| C. | Q to Z |
| D. | A to P |
| Answer» B. I to P | |
| 798. |
A set of eight form relieved milling cutters for each module is provided to enable cutting of gears of different |
| A. | Materials |
| B. | Types of gears |
| C. | Number of teeth |
| D. | Width of gears |
| Answer» D. Width of gears | |
| 799. |
In order to have interference fit, it is essential that the lower limit of the shaft should be |
| A. | Greater than the upper limit of the hole |
| B. | Lesser than the upper limit of the hole |
| C. | Greater than the lower limit of the hole |
| D. | Lesser than the lower limit of the hole |
| Answer» B. Lesser than the upper limit of the hole | |
| 800. |
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 | |