MCQOPTIONS
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MCQOPTIONS
This section includes 176 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Basic constituents of Monel metal are _________________? |
| A. | nickel, copper |
| B. | nickel, molybdenum |
| C. | zinc, tin, lead |
| D. | nickel, lead and tin |
| E. | none of the above |
| Answer» B. nickel, molybdenum | |
| 152. |
Balls for ball bearings are made of_________________? |
| A. | cast iron |
| B. | mild steel |
| C. | stainless steel |
| D. | carbon-chrome steel |
| E. | high carbon steel |
| Answer» E. high carbon steel | |
| 153. |
Babbit metal is a_________________? |
| A. | lead base alloy |
| B. | tin base alloy |
| C. | copper base alloy |
| D. | all of the above |
| E. | A. and C. above |
| Answer» F. | |
| 154. |
Austenite rs a combination of_________________? |
| A. | ferrite and cementite |
| B. | cementite and gamma iron |
| C. | ferrite and austenite |
| D. | ferrite and iron graphite |
| E. | pearlite and ferrite |
| Answer» C. ferrite and austenite | |
| 155. |
Argentite is the principal ore or raw material for _________________? |
| A. | aluminium |
| B. | tin |
| C. | zinc |
| D. | lead |
| E. | silver |
| Answer» F. | |
| 156. |
Annealing of white cast iron results in production of_________________? |
| A. | malleable iron |
| B. | nodular iron |
| C. | spheroidal iron |
| D. | grey iron |
| E. | none of the above |
| Answer» B. nodular iron | |
| 157. |
An important property of malleable cast iron in comparison to grey cast iron is the high___________________? |
| A. | compressive strength |
| B. | ductility |
| C. | carbon content |
| D. | hardness |
| E. | surface finish |
| Answer» C. carbon content | |
| 158. |
An important property of high silicon (12 – 18%) cast iron is the high__________________? |
| A. | tenacity |
| B. | brittleness |
| C. | plasticity |
| D. | corrosion resistance |
| E. | hardness |
| Answer» F. | |
| 159. |
An example of amorphous material is____________? |
| A. | zinc |
| B. | lead |
| C. | silver |
| D. | glass |
| E. | brass |
| Answer» E. brass | |
| 160. |
An engineer’s hammer is made of___________________? |
| A. | cast iron |
| B. | forged steel |
| C. | mild steel |
| D. | high carbon steel |
| E. | H.S.S |
| Answer» E. H.S.S | |
| 161. |
Amorphous material is one___________________? |
| A. | in which atoms align themselves in a geometric pattern upon solidification |
| B. | in which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid |
| C. | which is not attacked by phosphorous |
| D. | which emits fumes on melting |
| E. | none of the above |
| Answer» C. which is not attacked by phosphorous | |
| 162. |
Aluminium bronze contains__________________? |
| A. | 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe |
| B. | 92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg |
| C. | 10% aluminium and 90% copper |
| D. | 90% magnesium and 9% aluminium with some copper |
| E. | 10% aluminium and 90% tin |
| Answer» D. 90% magnesium and 9% aluminium with some copper | |
| 163. |
Aluminium bronze contains aluminium and copper in the ratio of___________________? |
| A. | 50 : 50 |
| B. | 40 : 60 |
| C. | 60 : 40 |
| D. | 10 : 90 |
| E. | 90 : 10 |
| Answer» E. 90 : 10 | |
| 164. |
Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio _____________________? |
| A. | 50 : 20 : 20 : 10 |
| B. | 40 : 30 : 20 : 10 |
| C. | 50 : 20 : 10 : 20 |
| D. | 30 : 20 : 30 : 20 |
| E. | 50 : 10 : 20 : 20 |
| Answer» B. 40 : 30 : 20 : 10 | |
| 165. |
Age-hardening is related with______________? |
| A. | stainless steel |
| B. | gun metal |
| C. | german silver |
| D. | duralumin |
| E. | cast iron |
| Answer» E. cast iron | |
| 166. |
Admiralty gun metal contains__________________? |
| A. | 63 to 67% nickel and 30% copper |
| B. | 88% copper, 10% tin and rest zinc |
| C. | alloy of tin, lead and cadmium |
| D. | iron scrap and zinc |
| E. | none of the above |
| Answer» C. alloy of tin, lead and cadmium | |
| 167. |
Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio_________________? |
| A. | 50 : 50 |
| B. | 30 : 70 |
| C. | 70 : 30 |
| D. | 40 : 60 |
| E. | 60 : 40 |
| Answer» C. 70 : 30 | |
| 168. |
Addition of silicon to aluminium results in____________________? |
| A. | improvement of casting characteristics |
| B. | improvement of corrosion resistance |
| C. | one of the best known age and precipitation-hardening systems |
| D. | improving machinability |
| E. | none of the above |
| Answer» B. improvement of corrosion resistance | |
| 169. |
Addition of manganese to aluminium results in__________________? |
| A. | improvement of casting characteristics |
| B. | improvement of corrosion resistance |
| C. | one of the best known age and precipitation-hardening systems |
| D. | improving machinability |
| E. | none of the above |
| Answer» C. one of the best known age and precipitation-hardening systems | |
| 170. |
Addition of lead and bismuth to aluminium results in_________________? |
| A. | improvement of casting characteristics |
| B. | improvement of corrosion resistance |
| C. | one of the best known age and precipitation-hardening systems |
| D. | improving machinability |
| E. | none of the above |
| Answer» E. none of the above | |
| 171. |
Addition of copper to aluminium results in_____________________? |
| A. | improvement of casting characteristics |
| B. | improvement of corrosion resistance |
| C. | one of the best known age and precipitation-hardening systems |
| D. | improving machinability |
| E. | none of the above |
| Answer» D. improving machinability | |
| 172. |
Acidic solution is one which has pH value__________________? |
| A. | greater than 7 |
| B. | less than 7 |
| C. | equal to 7 |
| D. | pH value has nothing to do with neutral solution |
| E. | none of the above |
| Answer» C. equal to 7 | |
| 173. |
A specimen of aluminium metal when observed under microscope shows __________________? |
| A. | B.C.C. crystalline structure |
| B. | F.C.C. crystal structure |
| C. | H.C.P. structure |
| D. | a complex cubic structure |
| E. | orthorhombic crystalline structure |
| Answer» C. H.C.P. structure | |
| 174. |
A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as_________________? |
| A. | allotropic change |
| B. | recrystallisation |
| C. | heat treatment |
| D. | precipitation |
| E. | austempering |
| Answer» B. recrystallisation | |
| 175. |
A reversible change in the atomic structure of steel with corresponding change in the properties is known as___________________? |
| A. | molecular change |
| B. | physical change |
| C. | allotropic change |
| D. | solidus change |
| E. | atomic change |
| Answer» D. solidus change | |
| 176. |
A material is known as allotropic or polymorphic if it __________________? |
| A. | has a fixed structure under all conditions |
| B. | exists in several crystal forms at different temperatures |
| C. | responds to heat treatment |
| D. | has its atoms distributed in a random pattern |
| E. | none of the above |
| Answer» C. responds to heat treatment | |