McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 201. |
Feeler gauge is used for measuring clearance between two |
| A. | round surfaces |
| B. | spherical surfaces |
| C. | Parting off |
| D. | flat surfaces |
| E. | tapering surfaces |
| Answer» D. flat surfaces | |
| 202. |
Preheating is usually done while welding |
| A. | Cast iron |
| B. | Aluminium |
| C. | Thin sheets of mild steel |
| D. | Thick sheets of mild steel |
| E. | Copper |
| Answer» A. Cast iron | |
| 203. |
EN series is used to designate |
| A. | aluminium alloys |
| B. | steels |
| C. | organic materials |
| D. | Parting off |
| E. | copper alloys |
| Answer» B. steels | |
| 204. |
Sweep patterns are used for |
| A. | Circular shape objects |
| B. | Rectangular objects |
| C. | Any large size objects |
| D. | Ellipucal objects |
| E. | Tiny objects |
| Answer» A. Circular shape objects | |
| 205. |
Kuock out mechanism in press is used to |
| A. | chamfer the edges |
| B. | eject out the component |
| C. | shift the position of work piece after one operation |
| D. | None of the above |
| E. | Parting off |
| Answer» B. eject out the component | |
| 206. |
While machining cast iron generally cutting fluid is not required because |
| A. | Cast iron surface is generally rough |
| B. | The cast iron jobs revolves at low speeds |
| C. | Cast iron contains graphite which does not allow temperatures to rise |
| D. | Cast iron contains carbon which cools the job |
| E. | None of the above |
| Answer» C. Cast iron contains graphite which does not allow temperatures to rise | |
| 207. |
An idler pulley is used for |
| A. | Changing the direction of rotation |
| B. | Running during no load period |
| C. | For stopping the motion frequently |
| D. | For adjusting the belt tension |
| E. | None of the above |
| Answer» D. For adjusting the belt tension | |
| 208. |
Trepanning operation is used for |
| A. | Producing large holes |
| B. | Under cutting |
| C. | Cutting grooves |
| D. | Finishing the ends of the job |
| E. | Bevelling the edges |
| Answer» A. Producing large holes | |
| 209. |
The difference between a plate and sheet is |
| A. | A plate is less than 5 mm in thickness |
| B. | A sheet is more than 5 mm in thickness |
| C. | A sheet is always more than 5 metres in length |
| D. | Sheet and plate are same and thickness is immaterial |
| E. | A sheet is always less than 5 mm thick and a plate more than 5 mm thick |
| Answer» E. A sheet is always less than 5 mm thick and a plate more than 5 mm thick | |
| 210. |
Arc blow is a welding defect which is encountered |
| A. | In thermit welding |
| B. | In MIG welding |
| C. | In arc welding using a.c. current |
| D. | In arc welding using d.c. current |
| E. | In gas welding |
| Answer» D. In arc welding using d.c. current | |
| 211. |
At what rpm should a lathe be run to give a cutting speed of 25 m/min. When turning a rod of diameter 32 mm. |
| A. | Parting off |
| B. | 160 rpm |
| C. | 100 rpm |
| D. | 200 rpm |
| E. | 250 rpm |
| Answer» E. 250 rpm | |
| 212. |
Mechanical seals are used |
| A. | To prevent vibrations |
| B. | To prevent leakage |
| C. | To reduce friction |
| D. | To balance the equipment |
| E. | None of the above |
| Answer» B. To prevent leakage | |
| 213. |
The thickness of clearance can be checked by |
| A. | Shap gauge |
| B. | Ring gauge |
| C. | Go and not go gauge |
| D. | Feeler gauge |
| E. | Any of the above |
| Answer» D. Feeler gauge | |
| 214. |
A process applying oxide coating on aluminium is known as |
| A. | Anodizing |
| B. | Oxidizing |
| C. | Pickering |
| D. | Galvanising |
| E. | Blanking |
| Answer» A. Anodizing | |
| 215. |
The advantage of mercury switch is |
| A. | No mechanical moving parts |
| B. | No open contacts |
| C. | Sealed from dirt and contamination |
| D. | Maintanance free |
| E. | All of the above |
| Answer» E. All of the above | |
| 216. |
The advantage of electronically operated automatic control system is |
| A. | Can be located in hazardous locations |
| B. | Needs no maintenance |
| C. | Does not require skilled service personnel |
| D. | No time lags, no transmission delays |
| E. | Does not cost much |
| Answer» D. No time lags, no transmission delays | |
| 217. |
International Prototype Meter is made of |
| A. | Copper |
| B. | Mild steel |
| C. | Cast iron |
| D. | Copper-nickel alloy |
| E. | Platinum-iridium alloy |
| Answer» E. Platinum-iridium alloy | |
| 218. |
Die sinking is |
| A. | The process of hardening of dies by sinking in quenching oil |
| B. | The local cooling of dies on the dia surface by pouring oil on the spot |
| C. | The process of cutting die impression |
| D. | The process of scrapping a die impression so that remaining metal may be retrieved for further use |
| E. | None of the above |
| Answer» C. The process of cutting die impression | |
| 219. |
The mallets used in sheet metal shop are made from |
| A. | Parting off |
| C. | Cast iron |
| D. | Wood, fiber |
| E. | Mild steel |
| Answer» D. Wood, fiber | |
| 220. |
A circular mill is |
| A. | A circle of 1 metre diameter |
| B. | A milling operation done on lathe is known as circular mill |
| C. | A milling machine used for cutting circular jobs by giving motion to the job during cutting |
| D. | Area of a circle of 1 mile radius |
| E. | Area of 0.001 inch diameter circle |
| Answer» E. Area of 0.001 inch diameter circle | |
| 221. |
The method of joining metals by means of cast iron alloy whose melting point is below 425?C is known as |
| A. | Non-ferrous welding |
| B. | Soldering |
| C. | Brazing |
| D. | Galvanising |
| E. | Adhesive bonding |
| Answer» B. Soldering | |
| 222. |
The important factor to be considered while selecting a bearing is |
| A. | Applied load |
| B. | Operating speed range |
| C. | Required bearing capacity |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 223. |
The purpose of sometimes adding exothermic materials to sand is |
| A. | To dry the mould |
| B. | To produce directional solidification by the generation of heat |
| C. | To produce chilled surfaces |
| D. | To heat the core |
| E. | To heat the sand |
| Answer» B. To produce directional solidification by the generation of heat | |
| 224. |
The backlash between gears is expressed in terms of |
| A. | Difference between addendum and dedendum |
| B. | The difference between PCD of two gears |
| C. | The actual gear width on pitch circle minus the standard gear width for given number of teeth on gear |
| D. | Clearance between faces of the mating gears |
| E. | None of the above |
| Answer» D. Clearance between faces of the mating gears | |
| 225. |
In all the following case chips produced are in the form of fragments EXCEPT |
| A. | Trepanning of steel |
| B. | Facing of bronze |
| C. | Shaping of cast iron |
| D. | Milling of aluminium |
| E. | Parting off |
| Answer» A. Trepanning of steel | |
| 226. |
While using HSS tools on a lathe, cutting speed will be maximum when machining |
| A. | Mild steel |
| B. | Cast iron |
| C. | High carbon steel |
| D. | High speed steel |
| E. | Aluminium |
| Answer» E. Aluminium | |
| 227. |
Heating elements for domestic and industrial electrical applications are made of |
| A. | Babbit metal |
| B. | Invar |
| C. | Delta metal |
| D. | Duralumin |
| E. | Nichrome |
| Answer» E. Nichrome | |
| 228. |
The process of joining two slip gauges is known as |
| A. | Piercing |
| B. | Wringing |
| C. | Welding |
| D. | Pressing |
| E. | Soldering |
| Answer» B. Wringing | |
| 229. |
When 50 mm rod is turning at a spindle speed of 200 rpm the cutting speed would be |
| A. | 15 - 20 m/min |
| B. | 10 - 12 m/min |
| C. | 12 - 15 m/min |
| D. | 30-35 m/min |
| E. | 20 - 28 m/min |
| Answer» D. 30-35 m/min | |
| 230. |
The commonly used material for thermocouples is |
| A. | Chromel-copper |
| B. | Chromel-alumel |
| C. | Platinum-rhodium |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
| 231. |
It is desired to remove large quantity of material from a job in shortest possible time, on a lathe using high speed steel cutter. Which of the following step will be helpful? |
| A. | Reduce spindle speed and increase depth of cut |
| B. | Increase spindle speed and take light cuts |
| C. | Increase spindle speed and take light cuts |
| D. | At the speed corresponding to cutting speed take roughing cuts of maximum possible depth |
| E. | None of the above |
| Answer» D. At the speed corresponding to cutting speed take roughing cuts of maximum possible depth | |
| 232. |
Which surfaces are usually 'wrung' together? |
| A. | Gears |
| B. | Slip gauges |
| C. | Threads |
| D. | Drill shanks and collets |
| E. | Bed guides for lathe |
| Answer» B. Slip gauges | |
| 233. |
Which of the following is often used as flux in brazing process? |
| A. | Fevicol |
| B. | Iron dust |
| C. | Borax |
| D. | Ammonia chloride |
| E. | Turpentine |
| Answer» C. Borax | |
| 234. |
A crater is a pit formed on |
| A. | flank of tool |
| B. | face of tool |
| C. | surface of work piece |
| D. | None of the above |
| E. | Parting off |
| Answer» B. face of tool | |
| 235. |
Green colour on a pattern indicates |
| A. | Seats for loose core prints |
| B. | Fillets |
| C. | Surface to be machined |
| D. | Core prints |
| E. | Surface to be left unmachined |
| Answer» A. Seats for loose core prints | |
| 236. |
Shear angle varies with |
| A. | Feed |
| B. | Depth of cut |
| C. | Material of tool |
| D. | Work piece materials and tool geometry |
| E. | Cutting speed |
| Answer» D. Work piece materials and tool geometry | |
| 237. |
Weld spatter is |
| A. | A flux |
| B. | A filler material used in gas welding |
| C. | A welding defect |
| D. | An electrode used in inert atmosphere |
| E. | A filler material used in soldering |
| Answer» C. A welding defect | |
| 238. |
In centreless grinding, work piece is clamped in |
| A. | Chuck |
| B. | Bed |
| C. | Vice |
| D. | Not clamped |
| E. | Collet |
| Answer» D. Not clamped | |
| 239. |
Straight fluted drills are used for |
| A. | Amorphous materials |
| B. | Ferrous materials |
| C. | Brass and soft materials |
| D. | Very hard materials |
| E. | Brittle materials |
| Answer» C. Brass and soft materials | |
| 240. |
Carbondioxide is |
| A. | Neutral gas |
| B. | Combustible gas |
| C. | Rare gas |
| D. | Inactive gas |
| E. | Ionic gas |
| Answer» D. Inactive gas | |
| 241. |
Necking is |
| A. | Preparation of surface for brazing |
| B. | Hole drilled for riveting |
| C. | Drilling a hole in a plate |
| D. | Machining a groove around cylindrical shaft |
| E. | Initial spot welding to position jobs |
| Answer» D. Machining a groove around cylindrical shaft | |
| 242. |
The main advantage of investment casting is |
| A. | It can be conveniently adopted for heavy castings |
| B. | High degree of accuracy and surface finish |
| C. | There is no sophisticated technology involved |
| D. | No special tooling is required |
| E. | Raw materials required are cheap |
| Answer» B. High degree of accuracy and surface finish | |
| 243. |
Cutting speeds for some materials are given as |
| A. | 30 m/min |
| B. | 20 m/min |
| C. | 100 m/min |
| D. | 40 m/min |
| E. | 80 m/min |
| Answer» D. 40 m/min | |
| 244. |
Large size bolt heads are made by |
| A. | Hammering |
| B. | Roll forging |
| C. | Upset-forging |
| D. | Swaging |
| E. | Casting |
| Answer» C. Upset-forging | |
| 245. |
Cyaniding |
| A. | A process of annealing a ferrous alloy |
| B. | A process of case hardening |
| C. | A process of removing carbon from metals |
| D. | A process of hardening and tempering |
| E. | A process used on non-ferrous materials for improving surface quantities |
| Answer» B. A process of case hardening | |
| 246. |
In climb milling |
| A. | Work moves in same direction as rotation of the cutter |
| B. | Tool climbs on the work piece for cutting operation |
| C. | Cutting takes place in two planes simultaneoudly |
| D. | Work is fed to cutter in lateral direction |
| E. | Work moves in opposite direction as rotation of the cutter |
| Answer» A. Work moves in same direction as rotation of the cutter | |
| 247. |
Which of the following is basically a polishing operation? |
| A. | Lapping |
| B. | Soft grinding |
| C. | Honing |
| D. | Parting off |
| E. | Buffing |
| Answer» E. Buffing | |
| 248. |
When a thin job is to be machined on a shaper, in order to prevent warping, which one of the following steps should be taken first? |
| A. | Light cut |
| B. | Heavy cut |
| C. | Single heavy cut |
| D. | Any of the above |
| E. | Vernier caliper |
| Answer» A. Light cut | |
| 249. |
Which of the following metal is best suited for electro forming? |
| A. | Lead |
| B. | Silver |
| C. | Mild steel |
| D. | Aluminium |
| E. | Zinc |
| Answer» B. Silver | |
| 250. |
Discontinuous chips in brittle materials are promoted by |
| A. | low cutting speed and insufficient rake angle |
| B. | coarse feed and low cutting speed |
| C. | low cutting speed and insufficient coolant |
| D. | None of the above |
| E. | Parting off |
| Answer» A. low cutting speed and insufficient rake angle | |
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