McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 301. |
A rack is gear of |
| A. | Infinite pitch |
| B. | Infinite module |
| C. | Infinite diameter |
| D. | Infinite number of teeth |
| E. | None of the above |
| Answer» D. Infinite number of teeth | |
| 302. |
A left hand tool on a lathe cuts most efficiently when |
| A. | Automatic feed is connected |
| B. | It travels from left to right |
| C. | It is operated by compound slide |
| D. | It travels from right to left |
| E. | It travels across the bed |
| Answer» B. It travels from left to right | |
| 303. |
A Bick iron is made of |
| A. | High speed steel |
| C. | Tool steel and hardened |
| D. | While cast iron |
| E. | Parting off |
| Answer» C. Tool steel and hardened | |
| 304. |
Which of the following is a process of chipless machining? |
| A. | Gear shaving |
| B. | Honing |
| C. | Broaching |
| D. | Hobbing |
| E. | Cold heading |
| Answer» E. Cold heading | |
| 305. |
Which one of the following methods can be used for turning external tapers only? |
| A. | Form tool |
| B. | Tail stock offset |
| C. | Reamer |
| D. | Compound rest |
| E. | Taper attachment |
| Answer» B. Tail stock offset | |
| 306. |
Plain and butt welds may be used on materials upto approximately |
| A. | 100 mm thick |
| B. | 75 mm thick |
| C. | 50 mm thick |
| D. | 40 mm thick |
| E. | 25 mm thick |
| Answer» E. 25 mm thick | |
| 307. |
Greater proportion of heat in a cutting operation is produced in the region of |
| A. | tool-chip interface |
| B. | shearing plane of chip |
| C. | tool and work piece contact |
| D. | None of the above |
| E. | Parting off |
| Answer» B. shearing plane of chip | |
| 308. |
The function of a chip breaker in a cutting tool is |
| A. | To provide smooth path for long chips |
| B. | To get long curled chips |
| C. | To break the chips into short segrments |
| D. | To remove chips from bed |
| E. | None of the above |
| Answer» C. To break the chips into short segrments | |
| 309. |
Continuous chips in ductile metals is promoted by |
| A. | Small rake angle |
| B. | Reduce the wall thickness and increase the diameter of tubes already made |
| C. | Low cutting speed |
| D. | Insufficient cooling |
| E. | Rine feed |
| Answer» E. Rine feed | |
| 310. |
A stub tooth is one that is |
| A. | Thicker in proportion to its length than involute tooth |
| B. | Smaller in proportion to its length than the involute tooth |
| C. | None of these |
| D. | Vernier caliper |
| E. | Same as involute tooth |
| Answer» B. Smaller in proportion to its length than the involute tooth | |
| 311. |
Gear tooth vernier is used to measure |
| A. | Pitch line thickness of gear tooth |
| B. | Addendum and dedendum |
| C. | Gear tooth thickness |
| D. | Module |
| E. | Gear tooth profile |
| Answer» A. Pitch line thickness of gear tooth | |
| 312. |
The moisture content of wood used for patterns should be |
| A. | More than 25% |
| B. | Zero |
| C. | More than 20% |
| D. | Less than 15% |
| E. | 1% |
| Answer» D. Less than 15% | |
| 313. |
The coefficient of friction between chip and tool is the variable. It can be reduced by |
| A. | Reducing the width of tool |
| B. | Reducing the depth of cut |
| C. | Reducing the effective rake angle |
| D. | None of these |
| E. | None of the above |
| Answer» C. Reducing the effective rake angle | |
| 314. |
A collimated light beam is used for producing heat in |
| A. | Percussion welding |
| B. | TIG welding |
| C. | Plasma welding |
| D. | MIG welding |
| E. | Laser welding |
| Answer» E. Laser welding | |
| 315. |
A time switch is |
| A. | A switch which operates for a fixed time only |
| B. | A switch which gets energised with time |
| C. | A 24 hour timing device used to open and close electric circuits according to time of day on a continually repeating schedule |
| D. | A switch with records timings of operation of a circuit |
| E. | None of the above |
| Answer» C. A 24 hour timing device used to open and close electric circuits according to time of day on a continually repeating schedule | |
| 316. |
In instrumentation a correction is |
| A. | Reading-error |
| B. | Range of error-degree of correctness |
| C. | The revision applied to the indicated value so that the final result obtained improves the worth of the result |
| D. | Lowest value of input which does not indicate the result |
| E. | An error |
| Answer» C. The revision applied to the indicated value so that the final result obtained improves the worth of the result | |
| 317. |
A 12 mm drilling machine means |
| A. | It can drill holes in 12 mm thick plates |
| B. | It can drill holes maximum 12 mm in diameter |
| C. | It can be used for crilling holes having cross-sectional area of 12 sq mm |
| D. | All of the above |
| E. | None of the above |
| Answer» B. It can drill holes maximum 12 mm in diameter | |
| 318. |
A sprue is |
| A. | A process of cleaning castings |
| B. | A chemical added to molten materials to get sound castings |
| C. | A tool used in mould repairing |
| D. | A special type of non-ferrous core used in centrifugal castings only |
| E. | A vertical passage through the cope and connecting the pouring basin to the runner or gate |
| Answer» E. A vertical passage through the cope and connecting the pouring basin to the runner or gate | |
| 319. |
Which one of the following methods is generally not used in welding of chromium molybdenum steels |
| A. | 100 mm thick |
| B. | Thermit |
| C. | Submerged arc |
| D. | Oxyacetylene |
| E. | Resistance |
| Answer» E. Resistance | |
| 320. |
Which of the following is the most rapid quenching medium? |
| A. | Solution of caustic soda |
| B. | High flash point oil |
| C. | Parting off |
| D. | Air |
| E. | Water |
| Answer» A. Solution of caustic soda | |
| 321. |
The length of hacksaw blades is |
| A. | Parting off |
| B. | 200 - 300 mm |
| D. | 300 mm - 400 mm |
| E. | 150 mm - 250 mm |
| Answer» B. 200 - 300 mm | |
| 322. |
In production work where several castings are required |
| A. | Parting off |
| B. | match plate patterns are used |
| C. | split patterns are used |
| D. | loose piece patterns are used |
| E. | gated patterns are used |
| Answer» E. gated patterns are used | |
| 323. |
In following operations are to be performed on a job, which one would be performed first |
| A. | Tapping |
| B. | Sport facing |
| C. | Boring |
| D. | Drilling |
| E. | Counter sinking |
| Answer» D. Drilling | |
| 324. |
Toole life cannot be defined as |
| A. | number of minutes after which tool failed |
| B. | machine time in minutes for which tool performed satisfactorily |
| C. | average length of cut per cutting edge |
| D. | None of the above |
| E. | Parting off |
| Answer» A. number of minutes after which tool failed | |
| 325. |
Which of the following press is best suited for embossing? |
| A. | Knuckle joint press |
| B. | Toggle action press |
| C. | Double action press |
| D. | None of the above |
| E. | Parting off |
| Answer» A. Knuckle joint press | |
| 326. |
Coarse feed, low rake angle, low cutting speed and insufficient cooling help produce |
| A. | continuous chips with built up edges in ductile materials |
| B. | discontinuous chips in brittle materials |
| C. | discontinuous chips in ductile materials |
| D. | continuous chips in ductile materials |
| E. | Parting off |
| Answer» A. continuous chips with built up edges in ductile materials | |
| 327. |
The chisels used in sheet metal work have |
| A. | Rounded cutting edge |
| B. | Straight cutting edge |
| C. | Any of (A) or (B) |
| E. | Parting off |
| Answer» A. Rounded cutting edge | |
| 328. |
The processes used for the machining of sintered and tungsten carbide is |
| A. | Grinding process |
| B. | Electroforming process |
| C. | Explosive forming process |
| D. | Turning process |
| E. | None of the above |
| Answer» B. Electroforming process | |
| 329. |
Nitrided steel is used for gears where |
| A. | Variable load operation is desired |
| B. | Low speed operation is desired |
| C. | Varying stresses are expected on teeth |
| D. | High hardness is desired on teeth |
| E. | Variable speed operation is desired |
| Answer» D. High hardness is desired on teeth | |
| 330. |
Which one of the following cannot be used as a moulding material |
| A. | Wood |
| B. | Cement |
| C. | Glass |
| D. | Paper |
| E. | Rubber |
| Answer» C. Glass | |
| 331. |
Severe quenching may lead to |
| A. | superficial hardness |
| B. | blow holes |
| C. | formation of cracks |
| D. | warping |
| E. | Parting off |
| Answer» C. formation of cracks | |
| 332. |
Steel balls are required in large quantities. Which process would you select for the manufacture? |
| A. | Cold heading |
| B. | Turning on a Capstan of Turret lathe |
| C. | Casting |
| D. | Turning on a lathe |
| E. | Turning on a automatic lathe |
| Answer» A. Cold heading | |
| 333. |
A half nut is |
| A. | A double start nut for a quick shift |
| B. | Mechanism that locks the lathe carriage to the lead screw for thread cutting |
| C. | Nut with half the standard pitch |
| D. | Damaged nut |
| E. | Nut manufactured in parts |
| Answer» B. Mechanism that locks the lathe carriage to the lead screw for thread cutting | |
| 334. |
Out of the following materials which one will have lowest temperature of freezing? |
| A. | Copper |
| B. | Zinc |
| C. | Gold |
| D. | Lead |
| E. | Tungsten |
| Answer» D. Lead | |
| 335. |
Trepanning tool is used on |
| A. | Milling machine |
| B. | Planers |
| C. | Lathes |
| D. | Power presses |
| E. | Cold heading machine |
| Answer» B. Planers | |
| 336. |
A blunt tool is used in |
| A. | knurling |
| B. | piercing |
| C. | Parting off |
| D. | gear shaving |
| E. | hot spinning. |
| Answer» E. hot spinning. | |
| 337. |
Suitable change wheels for cutting 17 T.P.I. on 4 T.P.I. lead screw lathe are |
| A. | 10 to 65 |
| B. | 15 to 85 |
| C. | 20 to 85 |
| D. | 30 to 105 |
| E. | None of the above |
| Answer» C. 20 to 85 | |
| 338. |
For the measurement of velocity, the transduction method could be |
| A. | Capacitive |
| B. | Inductive |
| C. | Magneto-electric |
| D. | Photoelectric |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 339. |
Burnishing operation is done with the help of |
| A. | Abrasives |
| B. | Dielectrics |
| C. | Balls |
| D. | Lubricating oils |
| E. | Any of the above |
| Answer» C. Balls | |
| 340. |
Which of the following process connot be carried out on lathe machine? |
| A. | Notching |
| B. | Riveting |
| C. | Punching |
| D. | Blanking |
| E. | All of the above |
| Answer» B. Riveting | |
| 341. |
Which of the following operations is known as 'sweating' |
| A. | Tinning the two surfaces to be joined, applying flux and heating |
| B. | Heating two surfaces to be joined, to the high temperature in presence of flux |
| C. | Heating two surfaces at low temperature |
| D. | Joining of two surfaces without use of flux |
| E. | None of the above |
| Answer» A. Tinning the two surfaces to be joined, applying flux and heating | |
| 342. |
The stake used for making conical shapes is known as |
| A. | Parting off |
| B. | Hatchet stake |
| C. | Funnel stake |
| E. | Moon stake |
| Answer» C. Funnel stake | |
| 343. |
A special form of piercing in which the entire contour is not cut, is known as |
| A. | Lancing |
| B. | Notching |
| C. | Trimming |
| D. | Slotting |
| E. | None of the above |
| Answer» A. Lancing | |
| 344. |
Carbon tool steels generally loose their hardness above |
| A. | 50?C |
| B. | 200?C |
| C. | 100?C |
| D. | Parting off |
| E. | 125?C |
| Answer» B. 200?C | |
| 345. |
Loading of grinding wheel occurs when |
| A. | Parting off |
| B. | part of grinding surface gives way |
| C. | long cracks develop on grinding wheel from centre to outer diameter |
| D. | abrasive grains become clogged with particles of metal being ground |
| E. | follow cavities are formed on the surface of grinding wheel |
| Answer» D. abrasive grains become clogged with particles of metal being ground | |
| 346. |
Preferred numbers are the numbers in |
| A. | arithmetic progression |
| B. | Parting off |
| C. | harmonic progression |
| D. | Logarithmic progression |
| E. | geometric progression |
| Answer» E. geometric progression | |
| 347. |
Surveying tapes are generally made of |
| A. | Invar |
| B. | Nichrome |
| C. | Constantan |
| D. | Nicheloy |
| E. | Muntz metal |
| Answer» A. Invar | |
| 348. |
In gas welding, the welding rods of 30 mm diameter are available. What will be the maximum thickness of material that can be welded with this rod? |
| A. | 3 mm |
| B. | 25 mm |
| C. | 12 mm |
| D. | 6 mm |
| E. | 30 mm |
| Answer» A. 3 mm | |
| 349. |
The temperature scanning system are used |
| A. | Where temperature control at a point is important |
| B. | Where temperature difference between two points is important |
| C. | Where system is capable of working without temperature control |
| D. | Where monitoring of a relatively large number of temperatures is needed |
| E. | None of the above |
| Answer» D. Where monitoring of a relatively large number of temperatures is needed | |
| 350. |
A good cutting action is indicated by |
| A. | High cutting ratio |
| B. | Low cutting ratio |
| C. | Low chip reduction coefficient |
| D. | None of the above |
| E. | Bakelite |
| Answer» B. Low cutting ratio | |
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