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.
| 701. |
The height of each tooth of a broach is |
| A. | Same throughout |
| B. | In progressively decreasing order |
| C. | In progressively increasing order |
| D. | None of these |
| Answer» D. None of these | |
| 702. |
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 | |
| 703. |
A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2 mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min, milling time for the slot (in seconds) is |
| A. | 120 |
| B. | 170 |
| C. | 180 |
| D. | 240 |
| Answer» C. 180 | |
| 704. |
The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at a cutting velocity of 18 m/min is |
| A. | 1.02 |
| B. | 1.32 |
| C. | 1.66 |
| D. | 1.82 |
| Answer» C. 1.66 | |
| 705. |
Hardness of steel greatly improves with |
| A. | Annealing |
| B. | Cyaniding |
| C. | Normalizing |
| D. | Tempering |
| Answer» C. Normalizing | |
| 706. |
In an interchangeable assembly, shafts of size 25.000 -0.0100‚Å∫‚Å∞‚à ô‚Å∞‚Å¥‚Å∞ mm mate with holes of size 25.000 -0.010‚Å∫‚Å∞‚à ô‚Å∞¬≤‚Å∞ mm. The maximum possible clearance in the assembly will be$ |
| A. | 10 microns |
| B. | 20 microns |
| C. | 30 microns |
| D. | 60 microns |
| Answer» D. 60 microns | |
| 707. |
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. | |
| 708. |
When the cutting edge of the tool is dull, then during machining |
| A. | Continuous chips are formed |
| B. | Discontinuous chips are formed |
| C. | Continuous chips with built-up edge are formed |
| D. | No chips are formed |
| Answer» D. No chips are formed | |
| 709. |
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 | |
| 710. |
Drilling is an example of |
| A. | Orthogonal cutting |
| B. | Oblique cutting |
| C. | Simple cutting |
| D. | Uniform cutting |
| Answer» C. Simple cutting | |
| 711. |
In a metal arc welding process, metal transfer across the arc may take place by a method of material transfer where the metal transfers across the arc is in larger drops. This is at the rate of 100 drops/sec or less, what is this known as |
| A. | Globular transfer |
| B. | Spray transfer |
| C. | GMAW practice |
| D. | Dip transfer |
| Answer» E. | |
| 712. |
The angle between the lathe centres is |
| A. | 30° |
| B. | 45° |
| C. | 60° |
| D. | 90° |
| Answer» D. 90¬¨‚àû | |
| 713. |
A twist drill is specified by its |
| A. | Shank, material and diameter |
| B. | Shank, lip angle and size of flute |
| C. | Material, length of body and helix angle |
| D. | Any one of these |
| Answer» B. Shank, lip angle and size of flute | |
| 714. |
The factor which affects the tool life is |
| A. | Tool geometry |
| B. | Cutting speed |
| C. | Feed rate |
| D. | All of these |
| Answer» E. | |
| 715. |
When the temperature of a solid metal increases, |
| A. | Strength of the metal decreases but ductility increases |
| B. | Both strength and ductility of the metal decreases |
| C. | Both strength and ductility of the metal increases |
| D. | Strength of the metal increases but ductility decreases |
| Answer» B. Both strength and ductility of the metal decreases | |
| 716. |
The maximum production of small and slender parts is done by |
| A. | Watch maker's lathe |
| B. | Sliding head stock automatic lathe |
| C. | Multi-spindle automatic lathe |
| D. | Capstan lathe |
| Answer» D. Capstan lathe | |
| 717. |
Glazing in grinding wheels takes place when the |
| A. | Wheel is too hard or wheel revolves at a very high speed |
| B. | Wheel is too soft or wheel revolves at a very slow speed |
| C. | Wheel is too hard and wheel revolves at very slow speed |
| D. | Wheel is too soft and wheel revolves at a very high speed |
| Answer» B. Wheel is too soft or wheel revolves at a very slow speed | |
| 718. |
Crater wear is mainly due to the phenomenon known as |
| A. | Adhesion of metals |
| B. | Oxidation of metals |
| C. | Diffusion of metals |
| D. | All of these |
| Answer» D. All of these | |
| 719. |
Hot rolling of mild steel is carried out |
| A. | At recrystallization temperature |
| B. | Between 100‚Äö√Ö‚àûC to 150‚Äö√Ö‚àûC |
| C. | Between recrystallization temperature |
| D. | Above recrystallization temperature |
| Answer» E. | |
| 720. |
The operation performed on a shaper is |
| A. | Machining horizontal surface |
| B. | Machining vertical surface |
| C. | Machining angular surface |
| D. | All of these |
| Answer» E. | |
| 721. |
A grinding wheel is said to be of _________ if the abrasive grains can be easily dislodged. |
| A. | Soft grade |
| B. | Medium grade |
| C. | Hard grade |
| D. | None of these |
| Answer» B. Medium grade | |
| 722. |
The common welding error that occurs due to wrong speed, faulty preparation, and high / low current, improper electrode size is called? |
| A. | Distortion |
| B. | Warping |
| C. | Porous weld |
| D. | Poor fusion |
| Answer» E. | |
| 723. |
Slow speed of the spindle is necessary in |
| A. | Thread cutting |
| B. | Turning a work of larger diameter |
| C. | Turning a hard or tough material |
| D. | All of these |
| Answer» E. | |
| 724. |
The lathe centres are provided with standard taper known as |
| A. | Morse taper |
| B. | Seller's taper |
| C. | Chapman taper |
| D. | Brown and Sharpe taper |
| Answer» B. Seller's taper | |
| 725. |
The effect of setting a boring tool above center height leads to |
| A. | Increase in the effective rake angle and a decrease in the effective clearance angle |
| B. | Increase in both effective rake angle and effective clearance angle |
| C. | Decrease in the effective rake angle and an increase in the effective clearance angle |
| D. | Decrease in both effective rake angle and effective clearance angle |
| Answer» B. Increase in both effective rake angle and effective clearance angle | |
| 726. |
A single point thread cutting tool should ideally have |
| A. | Zero rake angle |
| B. | Positive rake angle |
| C. | Negative rake angle |
| D. | Point angle |
| Answer» B. Positive rake angle | |
| 727. |
In order to prevent tool from rubbing the work _________ on tools are provided. |
| A. | Rake angles |
| B. | Relief angles |
| C. | Face angles |
| D. | None of these |
| Answer» C. Face angles | |
| 728. |
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 | |
| 729. |
In a center lathe, the cutting tool is fed in _________ with reference to the lathe axis. |
| A. | Cross direction only |
| B. | Longitudinal direction only |
| C. | Both cross and longitudinal direction |
| D. | Any direction |
| Answer» D. Any direction | |
| 730. |
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 | |
| 731. |
While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is |
| A. | Independent of index change gear ratio |
| B. | Dependent on speed change gear ratio |
| C. | Interrelated to index change gear ratio |
| D. | Independent of speed and index change gear ratio |
| Answer» D. Independent of speed and index change gear ratio | |
| 732. |
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 | |
| 733. |
The facing is an operation of |
| A. | Beveling 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. | Machining the ends of a workpiece to produce a flat surface square with the axis |
| Answer» E. | |
| 734. |
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. | |
| 735. |
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. | |
| 736. |
Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm.$ |
| A. | 2.17 rpm, 600 joules |
| B. | 6.8 rpm, 6 joules |
| C. | 5.03 rpm, 600 joules |
| D. | 22 rpm, 600 joules |
| Answer» B. 6.8 rpm, 6 joules | |
| 737. |
Which of the following process is used for preparing parts having large curved surfaces and thin sections? |
| A. | Hot machining |
| B. | Ultrasonic machining |
| C. | ECM process |
| D. | Chemical milling |
| Answer» E. | |
| 738. |
In a plain milling cutter, the portion of the gash adjacent to the cutting edge on which the chip impinges is called |
| A. | Face |
| B. | Fillet |
| C. | Land |
| D. | Lead |
| Answer» B. Fillet | |
| 739. |
The cutting force in punching and blanking operations mainly depends on |
| A. | The modulus of elasticity of metal |
| B. | The shear strength of metal |
| C. | The bulk modulus of metal |
| D. | The yield strength of metal |
| Answer» C. The bulk modulus of metal | |
| 740. |
Which type of motor is not used in axis or spindle drives of CNC machine tools? |
| A. | Induction motor |
| B. | DC servo motor |
| C. | Stepper motor |
| D. | Linear servo motor |
| Answer» D. Linear servo motor | |
| 741. |
In plunge 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» C. The work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face | |
| 742. |
The shear velocity is the velocity of |
| A. | Tool relative to the workpiece |
| B. | Chip relative to the tool |
| C. | Tool along the tool face |
| D. | None of these |
| Answer» E. | |
| 743. |
EDM machining is applied for |
| A. | Shaping carbide dies and punches having complicated profiles |
| B. | Making large number of small holes in sieves and fuel nozzles |
| C. | Embossing and engraving on harder materials |
| D. | All of these |
| Answer» E. | |
| 744. |
The width of cutting edge of a parting off tool varies from |
| A. | 3 to 12 mm |
| B. | 5 to 20 mm |
| C. | 8 to 30 mm |
| D. | 15 to 40 mm |
| Answer» B. 5 to 20 mm | |
| 745. |
Misrun is a casting defect which occurs due to |
| A. | Very high pouring temperature of the metal |
| B. | Insufficient fluidity of the molten metal |
| C. | Absorption of gases by the liquid metal |
| D. | Improper alignment of the mould flasks |
| Answer» C. Absorption of gases by the liquid metal | |
| 746. |
In _________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates. |
| A. | Conventional milling |
| B. | Climb milling |
| C. | Face milling |
| D. | End milling |
| Answer» B. Climb milling | |
| 747. |
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 | |
| 748. |
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 | |
| 749. |
The cutting speed for counter-boring should be _________ that of drilling operation. |
| A. | Equal to |
| B. | Less than |
| C. | Greater than |
| D. | None of these |
| Answer» D. None of these | |
| 750. |
The angle between the shear plane and _________ is called shear angle. |
| A. | Work surface |
| B. | Tool face |
| C. | Machine surface |
| D. | None of these |
| Answer» B. Tool face | |