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.
| 201. |
In oblique cutting of metals, the cutting edge of the tool is |
| A. | Perpendicular to the workpiece |
| B. | Perpendicular to the direction of tool travel |
| C. | Parallel to the direction of tool travel |
| D. | Inclined at an angle less than 90° to the direction of tool travel |
| Answer» E. | |
| 202. |
The process of improving the cutting action of the grinding wheel is called |
| A. | Truing |
| B. | Dressing |
| C. | Facing |
| D. | Clearing |
| Answer» C. Facing | |
| 203. |
Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as |
| A. | Cold shut |
| B. | Swell |
| C. | Sand wash |
| D. | Scab |
| Answer» B. Swell | |
| 204. |
The cutting fluid mostly used for machining alloy steels is |
| A. | Water |
| B. | Soluble oil |
| C. | Dry |
| D. | Sulphurised mineral oil |
| Answer» E. | |
| 205. |
Which of the following is the correct data structure for solid models? |
| A. | Solid part - faces - edges - vertices |
| B. | Solid part - edges - faces - vertices |
| C. | Vertices - edges - faces - solid parts |
| D. | Vertices - faces- edges - solid parts |
| Answer» D. Vertices - faces- edges - solid parts | |
| 206. |
Fixtures are used |
| A. | For holding and guiding the tool in drilling, reaming or tapping operations |
| B. | For holding the work in milling, grinding, planing or turning operations |
| C. | To check the accuracy of workpiece |
| D. | None of the above |
| Answer» C. To check the accuracy of workpiece | |
| 207. |
The tool life is affected by |
| A. | Depth of cut |
| B. | Cutting speed |
| C. | Feed |
| D. | All of these |
| Answer» E. | |
| 208. |
If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is |
| A. | Conical locator |
| B. | Cylindrical locator |
| C. | Diamond pin locator |
| D. | Vee locator |
| Answer» B. Cylindrical locator | |
| 209. |
Grinding wheels should be tested for balance |
| A. | Only at the time of manufacture |
| B. | Before starting the grinding operation |
| C. | At the end of grinding operation |
| D. | Occasionally |
| Answer» E. | |
| 210. |
The chuck preferred for quick setting and accurate centering of a job is |
| A. | Four jaw independent chuck |
| B. | Collect chuck |
| C. | Three jaw universal chuck |
| D. | Magnetic chuck |
| Answer» C. Three jaw universal chuck | |
| 211. |
Gear finishing operation is called |
| A. | Shaping |
| B. | Milling |
| C. | Hobbing |
| D. | Burnishing |
| Answer» E. | |
| 212. |
The main purpose of spheroidising treatment is to improve |
| A. | Hardenability of low carbon steels |
| B. | Machinability of low carbon steels |
| C. | Hardenability of high carbon steels |
| D. | Machinability of high carbon steels |
| Answer» E. | |
| 213. |
In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as Positive pole of the welding arc, the arrangement is known as |
| A. | Fusion |
| B. | Reverse polarity |
| C. | Forward welding |
| D. | Direct polarity |
| Answer» C. Forward welding | |
| 214. |
If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique? |
| A. | Forehand welding |
| B. | Flux cored ARC welding |
| C. | Electro slag welding |
| D. | Pulsed spray welding |
| Answer» B. Flux cored ARC welding | |
| 215. |
In centerless grinders, the regulating wheel is inclined at |
| A. | 0° to 8° |
| B. | 9° to 15° |
| C. | 16° to 20° |
| D. | 21° to 25° |
| Answer» B. 9° to 15° | |
| 216. |
What is the type of shielding gas for GTAW (Gas Tungsten Arc Welding) used for carbon steels only called? |
| A. | Argon H₂ |
| B. | Argon CO₂ |
| C. | Argon Helium |
| D. | Helium |
| Answer» C. Argon Helium | |
| 217. |
If the helix angle of the drill is made ________ 30°, then the torque required to drive the drill at a given feed will be more. |
| A. | Equal to |
| B. | Less than |
| C. | More than |
| D. | None of these |
| Answer» C. More than | |
| 218. |
The rake angle required to machine brass by high speed steel tool is |
| A. | 0° |
| B. | 10° |
| C. | 20° |
| D. | 100° |
| Answer» B. 10° | |
| 219. |
The average cutting speed for turning mild steel 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» C. 60 to 90 m/min | |
| 220. |
The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting speed for drilling mild steel with high speed steel drills. |
| A. | Equal to |
| B. | Less than |
| C. | More than |
| D. | None of these |
| Answer» B. Less than | |
| 221. |
The chuck used for setting up of heavy and irregular shaped work should be |
| A. | Four jaw independent chuck |
| B. | Three jaw universal chuck |
| C. | Magnetic chuck |
| D. | Drill chuck |
| Answer» B. Three jaw universal chuck | |
| 222. |
A push broach as compared to pull broach |
| A. | Has less number of teeth |
| B. | Is short and stocky |
| C. | Removes less material for each pass of the tool |
| D. | All of the above |
| Answer» E. | |
| 223. |
The hard 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» D. A to P | |
| 224. |
In electro-discharge machining, dielectric is used to |
| A. | Help in the movement of the sparks |
| B. | Control the spark discharges |
| C. | Act as coolant |
| D. | All of these |
| Answer» E. | |
| 225. |
Dielectric is used in |
| A. | Electrochemical machining |
| B. | Ultrasonic machining |
| C. | Electro discharge machining |
| D. | Laser machining |
| Answer» D. Laser machining | |
| 226. |
The tool made of cemented carbide wear out faster at |
| A. | Slow speeds |
| B. | Medium speeds |
| C. | Fast speeds |
| D. | Very fast speeds |
| Answer» B. Medium speeds | |
| 227. |
It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be |
| A. | 10 r.p.m. |
| B. | 20 r.p.m. |
| C. | 120 r.p.m. |
| D. | 180 r.p.m. |
| Answer» C. 120 r.p.m. | |
| 228. |
The angle on which the strength of the tool depends is |
| A. | Rake angle |
| B. | Cutting angle |
| C. | Clearance angle |
| D. | Lip angle |
| Answer» B. Cutting angle | |
| 229. |
Two 1 mm thick steel sheets are to be spot welded at a current of 5000 A. Assuming effective resistance to be 200 μm and current flow time of 0.2 second, heat generated during the process will be |
| A. | 0.2 Joule |
| B. | 1 Joule |
| C. | 5 Joule |
| D. | 1000 Joule |
| Answer» E. | |
| 230. |
The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is |
| A. | Feed rate, depth of cut, cutting speed |
| B. | Depth of cut, cutting speed, feed rate |
| C. | Cutting speed, feed rate, depth of cut |
| D. | Feed rate, cutting speed, depth of cut |
| Answer» D. Feed rate, cutting speed, depth of cut | |
| 231. |
The crystal structure of austenite is |
| A. | Body centered cubic |
| B. | Face centered cubic |
| C. | Hexagonal closed packed |
| D. | Body centered tetragonal |
| Answer» C. Hexagonal closed packed | |
| 232. |
In the relation VTn = C, the value of n for ceramic tools is |
| A. | 0.1 to 0.2 |
| B. | 0.20 to 0.25 |
| C. | 0.25 to 0.40 |
| D. | 0.40 to 0.55 |
| Answer» E. | |
| 233. |
In the relation VTn = C, the value of n for carbide tools is |
| A. | 0.1 to 0.2 |
| B. | 0.20 to 0.25 |
| C. | 0.25 to 0.40 |
| D. | 0.40 to 0.55 |
| Answer» C. 0.25 to 0.40 | |
| 234. |
The binding material used in cemented carbide tools is |
| A. | Tungsten |
| B. | Chromium |
| C. | Silicon |
| D. | Cobalt |
| Answer» E. | |
| 235. |
A 15 mm drilling machine means that it can drill a hole |
| A. | Of maximum diameter 15 mm |
| B. | In 15 mm thick plates |
| C. | None of these |
| D. | |
| Answer» B. In 15 mm thick plates | |
| 236. |
The material which on machining produces chips with built up edge is |
| A. | Brittle material |
| B. | Tough material |
| C. | Hard material |
| D. | Ductile material |
| Answer» E. | |
| 237. |
In grinding irregular, curved, tapered, convex and concave surfaces, the grinder used is |
| A. | Cylindrical grinder |
| B. | Internal grinder |
| C. | Surface grinder |
| D. | Tool and cutter grinder |
| Answer» D. Tool and cutter grinder | |
| 238. |
In Oxyacetylene gas welding, temperature at the inner cone of the flame is around |
| A. | 3500°C |
| B. | 3200°C |
| C. | 2900°C |
| D. | 2550°C |
| Answer» C. 2900°C | |
| 239. |
The depth of cut in drilling is __________ the drill diameter. |
| A. | Equal to |
| B. | One-fourth |
| C. | One-half |
| D. | Double |
| Answer» D. Double | |
| 240. |
Which of the following statement is correct for oblique cutting system? |
| A. | The cutting edge is inclined at an angle less than 90° with the normal to the velocity of the tool |
| B. | Frequently, more than one cutting edges are in action |
| C. | The chip flows on the tool face at an angle less than 90° with the normal on the cutting edge |
| D. | All of the above |
| Answer» E. | |
| 241. |
Low helix angle drills are preferred for drilling holes in |
| A. | Plastics |
| B. | Copper |
| C. | Cast steel |
| D. | Carbon steel |
| Answer» B. Copper | |
| 242. |
The relief or clearance at the cutting edge of a flat drill varies from |
| A. | 3° to 8° |
| B. | 20° to 30° |
| C. | 60° to 90° |
| D. | 90° to 120° |
| Answer» B. 20° to 30° | |
| 243. |
The cutting angle of a flat drill varies from |
| A. | 3° to 8° |
| B. | 20° to 30° |
| C. | 60° to 90° |
| D. | 90° to 120° |
| Answer» E. | |
| 244. |
The floating position of the holding fixture in a rotary transfer device is used to |
| A. | Improve the accuracy of location |
| B. | Reduce the tendency to over-index |
| C. | Improve upon the acceleration and deceleration characteristics |
| D. | Reduce the cycle time |
| Answer» E. | |
| 245. |
In electrochemical machining, the gap between the tool and work is kept as |
| A. | 0.1 mm |
| B. | 0.4 mm |
| C. | 0.35 mm |
| D. | 0.75 mm |
| Answer» E. | |
| 246. |
Ceramic tools are fixed to tool body by |
| A. | Soldering |
| B. | Brazing |
| C. | Welding |
| D. | Clamping |
| Answer» C. Welding | |
| 247. |
A _________ grinding wheel is used to grind soft materials. |
| A. | Course grained |
| B. | Medium grained |
| C. | Fine grained |
| D. | None of these |
| Answer» B. Medium grained | |
| 248. |
A feed gear box for a screw cutting lathe is designed on the basis of |
| A. | Geometric progression |
| B. | Arithmetic progression |
| C. | Harmonic progression |
| D. | None of these |
| Answer» B. Arithmetic progression | |
| 249. |
What is the type of welding defect is caused due to stresses on heating and cooling called? |
| A. | Incomplete penetration |
| B. | Shrinkage void |
| C. | Slag Entrapment (Inclusions) |
| D. | Incomplete fusion |
| Answer» C. Slag Entrapment (Inclusions) | |
| 250. |
The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called |
| A. | Truing |
| B. | Dressing |
| C. | Facing |
| D. | Clearing |
| Answer» B. Dressing | |