MCQOPTIONS
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MCQOPTIONS
This section includes 455 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 401. |
In a centrifugal casting method |
| A. | Core is made of sand |
| B. | Core is made of ferrous metal |
| C. | Core is made of nonferrous metal |
| D. | No core is used |
| Answer» E. | |
| 402. |
Blanking and piercing operations can be performed simultaneously in a |
| A. | Simple die |
| B. | Progressive die |
| C. | Compound die |
| D. | Combination die |
| Answer» D. Combination die | |
| 403. |
Loam sand is a mixture of |
| A. | 30% sand and 70% clay |
| B. | 50% sand and 50% clay |
| C. | 70% sand and 30% clay |
| D. | 90% sand and 10% clay |
| Answer» C. 70% sand and 30% clay | |
| 404. |
A gimlet is a ________ tool. |
| A. | Boring |
| B. | Marking |
| C. | Cutting |
| D. | None of these |
| Answer» B. Marking | |
| 405. |
In submerged arc welding, an arc is produced between a |
| A. | Carbon electrode and the work |
| B. | Metal electrode and the work |
| C. | Bare metal electrode and the work |
| D. | Two tungsten electrodes and the work |
| Answer» D. Two tungsten electrodes and the work | |
| 406. |
The property of sand due to which it evolves a great amount of steam and other gases is called |
| A. | Collapsibility |
| B. | Permeability |
| C. | Cohesiveness |
| D. | Adhesiveness |
| Answer» C. Cohesiveness | |
| 407. |
The flux commonly used in brazing is |
| A. | Zinc chloride |
| B. | Ammonium chloride |
| C. | Resin plus alcohol |
| D. | Borax |
| Answer» E. | |
| 408. |
Which of the following methods can be used for manufacturing 2 meter long seamless metallic tubes? |
| A. | Drawing |
| B. | Extrusion |
| C. | Rolling |
| D. | Extrusion and rolling |
| Answer» E. | |
| 409. |
A sand employed on the faces of the pattern before moulding, is called |
| A. | Green sand |
| B. | Dry sand |
| C. | Loam sand |
| D. | Parting sand |
| Answer» E. | |
| 410. |
In a ________, both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram. |
| A. | Simple die |
| B. | Progressive die |
| C. | Combination die |
| D. | Compound die |
| Answer» D. Compound die | |
| 411. |
Sand wash is a casting defect which |
| A. | Results in a mismatching of the top and bottom parts of a casting |
| B. | Results in general enlargement of the casting |
| C. | Occurs near the ingates as rough lumps on the surface of a casting |
| D. | Occurs as sand patches on the upper surface of a casting |
| Answer» D. Occurs as sand patches on the upper surface of a casting | |
| 412. |
Swab is used for |
| A. | Smoothing and cleaning out depressions in the mould |
| B. | Cleaning the moulding sand |
| C. | Moistening the sand around the edge before removing pattern |
| D. | Reinforcement of sand in the top part of the moulding box |
| Answer» D. Reinforcement of sand in the top part of the moulding box | |
| 413. |
The metal is subjected to mechanical working for |
| A. | Refining grain size |
| B. | Reducing original block into desired shape |
| C. | Controlling the direction of flow lines |
| D. | All of these |
| Answer» E. | |
| 414. |
In a bilateral system of tolerance, the tolerance is allowed on |
| A. | One side of the actual size |
| B. | One side of the nominal size |
| C. | Both sides of the actual size |
| D. | Both sides of the nominal size |
| Answer» E. | |
| 415. |
The increase in hardness due to cold working, is called |
| A. | Age hardening |
| B. | Work hardening |
| C. | Induction hardening |
| D. | Flame hardening |
| Answer» C. Induction hardening | |
| 416. |
A two high rolling mill consists of two rolls which rotate |
| A. | At the same speed and in the same direction |
| B. | At the same speed but in opposite direction |
| C. | At different speeds and in the same direction |
| D. | At different speeds and in the opposite direction |
| Answer» C. At different speeds and in the same direction | |
| 417. |
The cold working of metals is carried out |
| A. | At the recrystallisation temperature |
| B. | Below the recrystallisation temperature |
| C. | Above the recrystallisation temperature |
| D. | At any temperature |
| Answer» C. Above the recrystallisation temperature | |
| 418. |
A basic hole is one whose |
| A. | Lower deviation is zero |
| B. | Upper deviation is zero |
| C. | Lower and upper deviations are zero |
| D. | None of these |
| Answer» B. Upper deviation is zero | |
| 419. |
The electrodes used in spot welding have a tip of |
| A. | Stainless steel |
| B. | Aluminium |
| C. | Copper |
| D. | Brass |
| Answer» D. Brass | |
| 420. |
When more volume of acetylene and less volume of oxygen is supplied, then a ________ flame is obtained. |
| A. | Neutral |
| B. | Oxidizing |
| C. | Carburising |
| D. | None of these |
| Answer» D. None of these | |
| 421. |
In a cold chamber die casting machine |
| A. | Melting pot is separate from the machine |
| B. | Melting pot is an integral part of the machine |
| C. | Melting pot may have any location |
| D. | Low temperature and pressure is used |
| Answer» B. Melting pot is an integral part of the machine | |
| 422. |
During cold working process |
| A. | Grain structure is distorted |
| B. | Strength and hardness of metal increases |
| C. | Close dimensional tolerance can be maintained |
| D. | All of the above |
| Answer» E. | |
| 423. |
In shielded arc welding |
| A. | Large electrode is used |
| B. | Welding rod coated with slag is used |
| C. | Welding rod coated with fluxing material is used |
| D. | None of the above |
| Answer» D. None of the above | |
| 424. |
In order to check the clearance between two mating surfaces, a ________ gauge should be used. |
| A. | Ring |
| B. | Plug |
| C. | Feeler |
| D. | None of these |
| Answer» D. None of these | |
| 425. |
The casting method adopted for ornaments and toys of nonferrous alloys, is |
| A. | Permanent mould casting |
| B. | Slush casting |
| C. | Die casting |
| D. | Centrifugal casting |
| Answer» C. Die casting | |
| 426. |
The instrument used to measure external and internal diameter of shafts, thickness of parts and depth of holes, is |
| A. | Outside micrometer |
| B. | Inside micrometer |
| C. | Depth gauge micrometer |
| D. | Vernier caliper |
| Answer» E. | |
| 427. |
The upsetting is a process of |
| A. | Increasing the cross-section of a bar |
| B. | Reducing the cross-section of a bar |
| C. | Joining the two surfaces of metal under pressure after heating |
| D. | Bending of a bar |
| Answer» B. Reducing the cross-section of a bar | |
| 428. |
Extrusion |
| A. | Is extensively used for making bolts and nuts |
| B. | Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work |
| C. | Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface |
| D. | Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part |
| Answer» E. | |
| 429. |
The cross-section of a chisel is usually |
| A. | Rectangular |
| B. | Square |
| C. | Hexagonal |
| D. | Octagonal |
| Answer» E. | |
| 430. |
In sheet metal work, he cutting force on the tool can be reduced by |
| A. | Grinding the cutting edges sharp |
| B. | Increasing the hardness of tool |
| C. | Providing shear on tool |
| D. | Increasing the hardness of die |
| Answer» B. Increasing the hardness of tool | |
| 431. |
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding. |
| A. | Same |
| B. | Less |
| C. | More |
| D. | None of these |
| Answer» D. None of these | |
| 432. |
The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called |
| A. | Shearing |
| B. | Piercing |
| C. | Punching |
| D. | Blanking |
| Answer» C. Punching | |
| 433. |
Scribing block is used to |
| A. | Hold the round bars during marking |
| B. | Check the trueness of flat surfaces |
| C. | Locate the centres of round bars |
| D. | Check the surface roughness |
| Answer» D. Check the surface roughness | |
| 434. |
The purpose of a riser is to |
| A. | Deliver molten metal into the mould cavity |
| B. | Act as a reservoir for the molten metal |
| C. | Feed the molten metal to the casting in order to compensate for the shrinkage |
| D. | Deliver the molten metal from pouring basin to gate |
| Answer» D. Deliver the molten metal from pouring basin to gate | |
| 435. |
Lap joints are employed on plates having thickness |
| A. | Less than 3 mm |
| B. | 5 to 10 mm |
| C. | 12.5 mm |
| D. | Above 25 mm |
| Answer» B. 5 to 10 mm | |
| 436. |
Notching is the operation of |
| A. | Cutting a sheet of metal in a straight line along the length |
| B. | Removal of metal to the desired shape from the edge of a plate |
| C. | Cutting a sheet of metal through part of its length and then bending the cut portion |
| D. | Bending a sheet of metal along a curved axis |
| Answer» C. Cutting a sheet of metal through part of its length and then bending the cut portion | |
| 437. |
The welding process used in joining mild steel shanks to high speed drills, is |
| A. | Spot welding |
| B. | Seam welding |
| C. | Flash butt welding |
| D. | Upset butt welding |
| Answer» D. Upset butt welding | |
| 438. |
In order to deliver molten metal from pouring basin to gate, a ________ is used. |
| A. | Riser |
| B. | Sprue |
| C. | Core |
| D. | None of these |
| Answer» C. Core | |
| 439. |
Thermit, used in Thermit welding, is a mixture of |
| A. | Charcoal and iron oxide |
| B. | Charcoal and aluminium |
| C. | Iron oxide and aluminium |
| D. | Charcoal, iron oxide and aluminium |
| Answer» D. Charcoal, iron oxide and aluminium | |
| 440. |
The diaphragm moulding machine is used to |
| A. | Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould |
| B. | Ram the sand harder at the back of the mould and softer on the pattern face |
| C. | Produce uniform packing of sand in the mould |
| D. | Give uniform sand hardness throughout the mould |
| Answer» E. | |
| 441. |
A taper provided on the pattern for its easy and clean withdrawal from the mould is known as |
| A. | Machining allowance |
| B. | Draft allowance |
| C. | Shrinkage allowance |
| D. | Distortion allowance |
| Answer» C. Shrinkage allowance | |
| 442. |
Acetylene gas is stored in cylinders in |
| A. | Solid form |
| B. | Gaseous form |
| C. | Liquid form |
| D. | Any one of these |
| Answer» D. Any one of these | |
| 443. |
The brass and bronze are welded by _________ flame. |
| A. | Neutral |
| B. | Oxidizing |
| C. | Carburising |
| D. | All of these |
| Answer» C. Carburising | |
| 444. |
Aluminium is the best material for making patterns because it is |
| A. | Light in weight |
| B. | Easy to work |
| C. | Corrosion resistant |
| D. | All of these |
| Answer» E. | |
| 445. |
A zinc diffusion process is called |
| A. | Galvanizing |
| B. | Anodizing |
| C. | Parkerising |
| D. | Sherardizing |
| Answer» E. | |
| 446. |
The metal extrusion process is generally used for producing |
| A. | Uniform solid sections |
| B. | Uniform hollow sections |
| C. | Uniform solid and hollow sections |
| D. | Varying solid and hollow sections |
| Answer» D. Varying solid and hollow sections | |
| 447. |
Cast iron and steel pipes are produced by |
| A. | Slush casting |
| B. | Investment casting |
| C. | True centrifugal casting |
| D. | Die casting |
| Answer» D. Die casting | |
| 448. |
In a _______, the molten metal is poured and allowed to solidify while the mould is revolving. |
| A. | Die casting method |
| B. | Slush casting method |
| C. | Permanent mould casting method |
| D. | Centrifugal casting method |
| Answer» E. | |
| 449. |
In a ________, two or more operations are performed simultaneously at the single stroke of the ram. |
| A. | Simple die |
| B. | Progressive die |
| C. | Combination die |
| D. | Compound die |
| Answer» C. Combination die | |
| 450. |
The dowels are |
| A. | Wooden nails |
| B. | Box nails |
| C. | Wire nails |
| D. | None of these |
| Answer» B. Box nails | |