MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 7151. |
Presence of nickel & chromium in steel does not raise its |
| A. | elastic limit |
| B. | machining properties |
| C. | ductility |
| D. | resilience |
| Answer» B. machining properties | |
| 7152. |
__________ of air does not increase with increase in temperature. |
| A. | Density |
| B. | Thermal diffusivity |
| C. | Viscosity |
| D. | Thermal conductivity |
| Answer» B. Thermal diffusivity | |
| 7153. |
Spherical shape of mercury droplets is due to its |
| A. | high viscosity. |
| B. | low surface tension. |
| C. | high density. |
| D. | high surface tension. |
| Answer» E. | |
| 7154. |
Sub zero treatment of steel is done to |
| A. | suppress martensite transformation. |
| B. | enhance its working performance in sub zero atmosphere. |
| C. | reduce the retained austenite in hardened steel. |
| D. | induce temper brittleness after its hardening. |
| Answer» D. induce temper brittleness after its hardening. | |
| 7155. |
Air-petrol ratio for maximum power generation in spark ignition engine is about |
| A. | 6:1 |
| B. | 12 : 1 |
| C. | 18 : 1 |
| D. | 24 : 1 |
| Answer» C. 18 : 1 | |
| 7156. |
Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner ? |
| A. | Output & fineness |
| B. | Velocity |
| C. | Both (a) & (b) |
| D. | None of these |
| Answer» D. None of these | |
| 7157. |
Hot extrusion process is not used for making |
| A. | cast iron pipe for domestic water supply. |
| B. | aluminium curtain rods. |
| C. | stainless steel tubes used in furnitures. |
| D. | any of these. |
| Answer» B. aluminium curtain rods. | |
| 7158. |
Quartz is a __________ material. |
| A. | diamagnetic |
| B. | ferromagnetic |
| C. | ferroelectric |
| D. | piezoelectric |
| Answer» E. | |
| 7159. |
A reduction in thermal resistance during heat transfer does not occur in the |
| A. | convection heat transfer by stirring the fluid and cleaning the heating surface. |
| B. | conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity. |
| C. | radiation heat transfer by increasing the temperature and reducing the emis-sivity. |
| D. | none of these. |
| Answer» D. none of these. | |
| 7160. |
Shaft/rotor speed is most accurately measured by a |
| A. | frequency counter. |
| B. | tachometer. |
| C. | strobometer. |
| D. | speedometer. |
| Answer» D. speedometer. | |
| 7161. |
__________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material. |
| A. | Tensile |
| B. | Fatigue |
| C. | Impact |
| D. | None of these |
| Answer» B. Fatigue | |
| 7162. |
The rolling process can not be used to produce |
| A. | plates |
| B. | rods |
| C. | tubes |
| D. | wires |
| Answer» D. wires | |
| 7163. |
The pressure outside a bubble/droplet of liquid is __________ the internal pressure. |
| A. | greater than |
| B. | less than |
| C. | equal to |
| D. | unpredictable ; depends on the bubble size |
| Answer» C. equal to | |
| 7164. |
Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of |
| A. | 1:1 |
| B. | 1:2 |
| C. | 2:1 |
| D. | 1:4 |
| Answer» B. 1:2 | |
| 7165. |
Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils ? |
| A. | Elaiden test |
| B. | Reichart-Meissl value test |
| C. | Henter value test |
| D. | Iodine value test |
| Answer» B. Reichart-Meissl value test | |
| 7166. |
The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity. |
| A. | 0 |
| B. | 100 |
| C. | 50 |
| D. | none of these |
| Answer» C. 50 | |
| 7167. |
The process of removal of scale formed during hot rolling of steel is termed as |
| A. | descaling |
| B. | shot blasting |
| C. | pickling |
| D. | skimming |
| Answer» D. skimming | |
| 7168. |
A psychrometer does not measure the __________ temperature of moist air. |
| A. | dew point |
| B. | dry bulb |
| C. | wet bulb |
| D. | none of these |
| Answer» B. dry bulb | |
| 7169. |
An ideal material for making cooking vessels should have |
| A. | high heat capacity. |
| B. | low heat capacity. |
| C. | high thermal conductivity. |
| D. | both (b) and (c). |
| Answer» E. | |
| 7170. |
Powder metallurgy technique is used in the production of __________ tools. |
| A. | tungsten carbide |
| B. | high carbon steel |
| C. | high speed steel |
| D. | drilling |
| Answer» B. high carbon steel | |
| 7171. |
Fluorine is not a constituent of |
| A. | freon |
| B. | chloroform |
| C. | teflon |
| D. | fluorocarbons |
| Answer» C. teflon | |
| 7172. |
The most commonly used combustion system manufactured in India for the thermal power plant boilers is the __________ combustion system. |
| A. | pulverised fuel |
| B. | travelling grate stoker firing |
| C. | circulating fluidised bed |
| D. | fluidised bed |
| Answer» B. travelling grate stoker firing | |
| 7173. |
During solid state sintering of powders, the following mechanism can be active. |
| A. | Evaporation and condensation. |
| B. | Solid state diffusion processes. |
| C. | Liquid formation in grain boundaries. |
| D. | Creation of more dislocations. |
| Answer» C. Liquid formation in grain boundaries. | |
| 7174. |
The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ C. |
| A. | 768 |
| B. | 1127 |
| C. | 1359 |
| D. | 1480 |
| Answer» C. 1359 | |
| 7175. |
Regeneration of molecular seive requires it to be heated to a temperature of about __________ C. |
| A. | 80-120 |
| B. | 200-300 |
| C. | 600-800 |
| D. | 1000-1100 |
| Answer» E. | |
| 7176. |
In chemical dehumidification process |
| A. | wet bulb temperature increases. |
| B. | dry bulb temperature remains constant. |
| C. | dew point temperature increases. |
| D. | dry bulb temperature increases. |
| Answer» C. dew point temperature increases. | |
| 7177. |
Secondary hardening in steels arises out of the |
| A. | precipitation of fine alloy carbides at high temperatures. |
| B. | refinement of ferrite grain size by working. |
| C. | decomposition of retained austenite upon heat treatment. |
| D. | precipitation of complex inter-metal-lics upon heat treatment. |
| Answer» D. precipitation of complex inter-metal-lics upon heat treatment. | |
| 7178. |
Drills are usually made of |
| A. | cermets |
| B. | high speed steel |
| C. | alloy steel |
| D. | tungsten carbide |
| Answer» C. alloy steel | |
| 7179. |
Tumbling is the process of improving the __________ of the materials/parts. |
| A. | surface finish |
| B. | fatigue limit |
| C. | creep limit |
| D. | surface cleanlineses |
| Answer» E. | |
| 7180. |
The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double. |
| A. | flow output |
| B. | head developed |
| C. | overall efficiency |
| D. | weight |
| Answer» B. head developed | |
| 7181. |
A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution. |
| A. | neutral |
| B. | ideal |
| C. | buffer |
| D. | zero pH |
| Answer» D. zero pH | |
| 7182. |
The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it. |
| A. | tension |
| B. | shear |
| C. | compression |
| D. | bending & tension |
| Answer» B. shear | |
| 7183. |
Which of the following is not categorised as the ore agglomeration process ? |
| A. | Nodulising |
| B. | Pelletising |
| C. | Balling |
| D. | Briquetting |
| Answer» D. Briquetting | |
| 7184. |
With increase in temperature, the surface tension of water |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | increases linearly |
| Answer» C. remains constant | |
| 7185. |
Maximum hardenability of steel depends upon its |
| A. | chemical composition |
| B. | carbon content |
| C. | grain size |
| D. | alloying elements content |
| Answer» E. | |
| 7186. |
Blast furnace slag is mainly molten |
| A. | sand |
| B. | magnesium silicate |
| C. | calcium silicate |
| D. | iron pyrite |
| Answer» D. iron pyrite | |
| 7187. |
A jet engine turbine blade is normally manufactured by |
| A. | forging. |
| B. | shell moulding. |
| C. | investment casting. |
| D. | pressure die casting. |
| Answer» D. pressure die casting. | |
| 7188. |
The cooling rate required to freeze 1 ton of water at 0 C into ice at 0 C in 24 hours is __________ BTU/hr. |
| A. | 100 |
| B. | 200 |
| C. | 1000 |
| D. | 2000 |
| Answer» C. 1000 | |
| 7189. |
Which of the following is not a principal alloying element for the structural steel? |
| A. | Molybednum |
| B. | Nickel |
| C. | Manganese |
| D. | Chromium |
| Answer» B. Nickel | |
| 7190. |
Metalloids |
| A. | are good conductor of heat & electricity. |
| B. | act as electron donors with metals & as electron acceptor with non-metals. |
| C. | are not necessarily solids at room temperature. |
| D. | are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron. |
| Answer» E. | |
| 7191. |
Lead is poured into the joints between two __________ pipes. |
| A. | cast iron |
| B. | steel |
| C. | concrete |
| D. | plastic |
| Answer» B. steel | |
| 7192. |
'Ice point' is designated on Farenhite temperature scale by |
| A. | 0 |
| B. | 32 |
| C. | 62 |
| D. | 212 |
| Answer» C. 62 | |
| 7193. |
In __________ process, ions of salts react with water to produce acidity or alkalinity. |
| A. | hydration |
| B. | hydrolysis |
| C. | electrolysis |
| D. | dialysis |
| Answer» C. electrolysis | |
| 7194. |
__________ is used for tying the steel coloumns to concrete foundation. |
| A. | Grouting |
| B. | Eyebolt |
| C. | Anchor bolts |
| D. | Refractory castables |
| Answer» D. Refractory castables | |
| 7195. |
Fatigue resistance of a material is measured by the |
| A. | elastic limit. |
| B. | ultimate tensile strength. |
| C. | Young's modulus. |
| D. | endurance limit. |
| Answer» E. | |
| 7196. |
__________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten. |
| A. | Stellite |
| B. | High speed steel |
| C. | Cermet |
| D. | Alnico |
| Answer» B. High speed steel | |
| 7197. |
A dense structure of grinding wheel is not used for the |
| A. | ductile material. |
| B. | hard materials. |
| C. | brittle materials. |
| D. | finishing cuts. |
| Answer» B. hard materials. | |
| 7198. |
The best guide to judge the general quality of water is the measurement of its |
| A. | pH value. |
| B. | electrical conductivity. |
| C. | turbidity. |
| D. | dissolved oxygen content. |
| Answer» C. turbidity. | |
| 7199. |
Which of the following is the largest quantum of pressure? |
| A. | 1 kg/cm |
| B. | <sup>2</sup> |
| C. | 1 bar |
| D. | 1 atmosphere |
| E. | 1 kilo Pascal |
| Answer» D. 1 atmosphere | |
| 7200. |
Which of the following is not a charge material for cupola ? |
| A. | Limestone |
| B. | Iron scrap |
| C. | Iron ore |
| D. | Pig iron |
| Answer» D. Pig iron | |