MCQOPTIONS
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MCQOPTIONS
This section includes 2171 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1251. |
Most of the oxy-acetylene welding is done with |
| A. | neutral flame |
| B. | oxidising flame |
| C. | carburising flame |
| D. | all of these |
| Answer» B. oxidising flame | |
| 1252. |
The oxy-acetylene gas used in gas welding produce a flame temperature of |
| A. | 1800°C |
| B. | 2100°C |
| C. | 2400°C |
| D. | 3200°C |
| Answer» E. | |
| 1253. |
A file with 50 - 60 teeth in 25 mm is called bastard file. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 1254. |
Which one of the following material will require the largest size of riser for the same size of casting? |
| A. | Aluminium |
| B. | Cast iron |
| C. | Steel |
| D. | Copper |
| Answer» D. Copper | |
| 1255. |
The welding set up is said to have straight polarity, when |
| A. | work is connected to the positive terminal and the electrode holder to the negative terminal |
| B. | work is connected to the negative terminal and the electrode holder to the positive terminal |
| C. | work is connected to the positive terminal and the electrode holder is earthed |
| D. | work is connected to the negative terminal and the electrode holder is earthed |
| Answer» B. work is connected to the negative terminal and the electrode holder to the positive terminal | |
| 1256. |
When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by |
| A. | washing it with water |
| B. | rubbing on wood |
| C. | washing it with dilute acid |
| D. | using file card |
| Answer» E. | |
| 1257. |
Cold working requires much higher pressure that hot working. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 1258. |
When the file is moved to and fro over the work, it is known as |
| A. | cross filing |
| B. | draw filing |
| C. | pull and push filing |
| D. | none of these |
| Answer» C. pull and push filing | |
| 1259. |
The oxygen cylinder is usually painted with |
| A. | black colour |
| B. | white colour |
| C. | maroon colour |
| D. | yellow colour |
| Answer» B. white colour | |
| 1260. |
An oxidising process used for aluminium and magnesium articles is called |
| A. | galvanising |
| B. | anodising |
| C. | parkerising |
| D. | sheradising |
| Answer» C. parkerising | |
| 1261. |
If the sand is too fine, its permeability will be high. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 1262. |
In order to produce uniform packing of sand in the moulds, a __________ is used. |
| A. | sand slinger |
| B. | squeezing machine |
| C. | jolt machine |
| D. | stripper plate machine |
| Answer» B. squeezing machine | |
| 1263. |
For cutting brass, the hacksaw blade should have __________ teeth per 25 mm. |
| A. | 14 |
| B. | 24 |
| C. | 32 |
| D. | 40 |
| Answer» B. 24 | |
| 1264. |
According to Indian standards, the total number of tolerance grades are |
| A. | 8 |
| B. | 12 |
| C. | 18 |
| D. | 20 |
| Answer» D. 20 | |
| 1265. |
When a pattern is made in three parts, the __________ is known as a drag. |
| A. | bottom part |
| B. | middle part |
| C. | top part |
| D. | None of these |
| Answer» B. middle part | |
| 1266. |
Cold working distorts grain structure and does not provide an appreciable reduction in size. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 1267. |
In bending operation, the metal takes the shape of a punch. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» B. No | |
| 1268. |
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. | |
| 1269. |
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. | |
| 1270. |
The process of decreasing the cross-section of a bar and increasing its length, is called |
| A. | drawing down |
| B. | upsetting |
| C. | spinning |
| D. | peening |
| Answer» B. upsetting | |
| 1271. |
Carburising flame is used to weld |
| A. | steel, cast iron, copper, aluminium etc |
| B. | brass and bronze |
| C. | hard surfacing materials such as stellite |
| D. | all of these |
| Answer» D. all of these | |
| 1272. |
The process of increasing the cross-section of a bar at the expense of its length, is called |
| A. | drawing down |
| B. | upsetting |
| C. | spinning |
| D. | peening |
| Answer» C. spinning | |
| 1273. |
Green 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» D. 90% sand and 10% clay | |
| 1274. |
Riddle 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 moulding box |
| Answer» C. moistening the sand around the edge before removing pattern | |
| 1275. |
According to Indian standard specifications, 100 H6/g 5 means that. |
| A. | basic size is 100 mm |
| B. | actual size is 100 mm |
| C. | difference between the actual size and basic size is 100 mm |
| D. | none of the above |
| Answer» B. actual size is 100 mm | |
| 1276. |
The length of hacksaw blade is the distance between the outside edges of the holes which fits over the pins. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 1277. |
For the construction of thin R.C.C. structures, the type of cement to be avoided, is |
| A. | ordinary Portland cement |
| B. | rapid hardening cement |
| C. | low heat cement |
| D. | blast furnace slag cement |
| Answer» E. | |
| 1278. |
Grading of sand causes great variation in |
| A. | workability of concrete |
| B. | strength of concrete |
| C. | durability of concrete |
| D. | all the above. |
| Answer» E. | |
| 1279. |
The most useless aggregate is one whose surface texture is |
| A. | smooth |
| B. | granular |
| C. | glassy |
| D. | honey combed and porous. |
| Answer» D. honey combed and porous. | |
| 1280. |
While designing an air entrained concrete |
| A. | water cement ratio is reduced |
| B. | proportion of aggregates is reduced |
| C. | an allowance for the entrained air is made |
| D. | all the above. |
| Answer» E. | |
| 1281. |
For preparing ordinary concrete, the quantity of water used, is |
| A. | 5% by weight of aggregates plus 20% of weight of cement |
| B. | 10% by weight of aggregates plus 10% of weight of cement |
| C. | 5% by weight of aggregates plus 30% of weight of cement |
| D. | 30% by weight of aggregates plus 10% of weight of cement |
| Answer» D. 30% by weight of aggregates plus 10% of weight of cement | |
| 1282. |
For a good concrete |
| A. | aggregates should be hard and durable |
| B. | cement should be sufficient to produce the required strength |
| C. | water should be free from organic materials |
| D. | All the above. |
| Answer» E. | |
| 1283. |
For an ordinary Portland cement |
| A. | residual does not exceed 10% when sieved through IS Sieve No. 9 |
| B. | soundness varies from 5 to 10 mm |
| C. | initial setting time is not less than 30 minutes |
| D. | compressive stress after 7 days, is not less than 175 kg/cm² |
| Answer» D. compressive stress after 7 days, is not less than 175 kg/cm² | |
| 1284. |
For preparing a test-specimen, it is necessary |
| A. | to mix cement and fine aggregate by dry hand |
| B. | to mix coarse aggregates |
| C. | to mix water to the cement, fine aggregates and coarse aggregates |
| D. | all the above. |
| Answer» E. | |
| 1285. |
Pick up the incorrect statement applicable to the field test of good cement. |
| A. | When one thrusts one's hand into a bag of cement, one should feel warm |
| B. | The colour of the cement is bluish |
| C. | A handful of cement thrown into a bucket of water should sink immediately |
| D. | All the above. |
| Answer» E. | |
| 1286. |
The produce impermeable concrete |
| A. | thorough mixing of concrete is required |
| B. | proper compaction of concrete is required |
| C. | proper curing of concrete is required |
| D. | all the above. |
| Answer» E. | |
| 1287. |
Permissible compressive strength of M 150 concrete grade is |
| A. | 100 kg/cm² |
| B. | 150 kg/cm² |
| C. | 200 kg/cm² |
| D. | 250 kg/cm² |
| Answer» C. 200 kg/cm² | |
| 1288. |
The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than |
| A. | 30 minutes |
| B. | 40 minutes |
| C. | 60 minutes |
| D. | 75 minutes |
| Answer» B. 40 minutes | |
| 1289. |
The commercial name of white and coloured cement in India, is |
| A. | colocrete |
| B. | rainbow cement |
| C. | silvicrete |
| D. | all the above. |
| Answer» E. | |
| 1290. |
Addition of pozzolana to cement |
| A. | decreases workability |
| B. | increases strength |
| C. | increases heat of hydration |
| D. | none of these. |
| Answer» E. | |
| 1291. |
ISI has specified full strength of concrete after |
| A. | 7 days |
| B. | 14 days |
| C. | 21 days |
| D. | none of these. |
| Answer» E. | |
| 1292. |
The bulk density of aggregates, is generally expressed as |
| A. | tonnes/cubic metre |
| B. | kg/cubic metre |
| C. | kg/litre |
| D. | g/cm³ |
| Answer» D. g/cm³ | |
| 1293. |
For concreting tunnel linings, tran-portation of concrete is done by |
| A. | pans |
| B. | wheel borrows |
| C. | containers |
| D. | pumps |
| Answer» E. | |
| 1294. |
Setting time of cement increases by adding |
| A. | gypsum |
| B. | hydrogen peroxide |
| C. | calcium chloride |
| D. | sodium oxide |
| Answer» B. hydrogen peroxide | |
| 1295. |
The shrinkage of concrete |
| A. | is proportional to water content is the mix |
| B. | is proportional to cement concrete |
| C. | increases with age of concrete |
| D. | all the above. |
| Answer» E. | |
| 1296. |
Ordinary Portland cement is manufactured from |
| A. | lime stone and clay |
| B. | gypsum and lime |
| C. | pozzolana |
| D. | lime, pozzolana and clay. |
| Answer» C. pozzolana | |
| 1297. |
The factor which affects workability, is |
| A. | water content and its temperature |
| B. | shape and size of the aggregates |
| C. | grading and surface textures of the aggregates |
| D. | all the above. |
| Answer» E. | |
| 1298. |
The void ratio of |
| A. | single size coarse aggregate is roughly 0.45. |
| B. | graded coarse aggregate is roughly 0.040 |
| C. | fine aggregate is roughly 0.45 |
| D. | all the above. |
| Answer» E. | |
| 1299. |
The maximum thickness of concrete floor of a cement warehouse, is |
| A. | 10 cm |
| B. | 15 cm |
| C. | 20 cm |
| D. | 25 cm |
| Answer» E. | |
| 1300. |
The condition not applicable to water cement ratio law, is |
| A. | internal moisture conditions on hydration continue till complete strength is gained |
| B. | concrete specimens may be tested at any temperature |
| C. | concrete specimens need be of same age |
| D. | concrete specimens need be of same size |
| Answer» C. concrete specimens need be of same age | |