MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower |
| A. | price. |
| B. | corrosion resistance. |
| C. | thermal conductivity. |
| D. | abundant availability. |
| Answer» E. | |
| 2. |
Ceramic materials fabrication can not be done by |
| A. | welding |
| B. | slip casting |
| C. | extrusion |
| D. | plastic pressing |
| Answer» B. slip casting | |
| 3. |
Most of the common metals have __________ crystal structure. |
| A. | cubic |
| B. | hexagonal |
| C. | orthorhombic |
| D. | none of these |
| Answer» B. hexagonal | |
| 4. |
Cast iron has very high |
| A. | compressive strength |
| B. | ductility |
| C. | shock resistance |
| D. | resistance to brittleness |
| Answer» B. ductility | |
| 5. |
Pipes for bi-cycle frames are made of __________ steel. |
| A. | hot rolled |
| B. | chrome carbon |
| C. | cold rolled |
| D. | stainless |
| Answer» D. stainless | |
| 6. |
Which of the following is a low melting point metal ? |
| A. | Stainless steel |
| B. | Wrought iron |
| C. | Tin |
| D. | Copper |
| Answer» D. Copper | |
| 7. |
Beehive coke ovens are made of __________ bricks. |
| A. | silica |
| B. | fireclay |
| C. | silicon carbide |
| D. | corundum |
| Answer» B. fireclay | |
| 8. |
Soap kettle used in the production of laundry soap is made of |
| A. | steel with top section nickel clad or stainless steel |
| B. | cast iron |
| C. | nickel |
| D. | concrete |
| Answer» B. cast iron | |
| 9. |
Babbit metal used for bearings is a____base alloy. |
| A. | tin |
| B. | lead |
| C. | aluminium |
| D. | copper |
| Answer» B. lead | |
| 10. |
Cast iron compared to steel is better in |
| A. | ductility |
| B. | fluidity & castability |
| C. | strength |
| D. | malleability |
| Answer» C. strength | |
| 11. |
Ball bearings are normally made of __________ steel. |
| A. | high speed |
| B. | high carbon |
| C. | chrome |
| D. | silicon |
| Answer» D. silicon | |
| 12. |
Dilute sulphuric acid is transported in __________ pipes. |
| A. | mild steel |
| B. | lead |
| C. | copper |
| D. | special alloys |
| Answer» C. copper | |
| 13. |
Babbit metal is not a |
| A. | tin base alloy |
| B. | white metal |
| C. | lead base alloy |
| D. | pure metal |
| Answer» E. | |
| 14. |
Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals) ? |
| A. | Invar |
| B. | Constantan |
| C. | Chromel |
| D. | Alumel |
| Answer» B. Constantan | |
| 15. |
Shock resisting steels should possess high |
| A. | hardness |
| B. | toughness |
| C. | tensile strength |
| D. | wear resistance |
| Answer» C. tensile strength | |
| 16. |
Babbit metals used for making bearings are |
| A. | tin or lead based alloys. |
| B. | short of antifrictional properties. |
| C. | having homogenous microstructure. |
| D. | yellow metals. |
| Answer» B. short of antifrictional properties. | |
| 17. |
18/8 steel is a/an __________ stainless steel. |
| A. | austenitic |
| B. | ferritic |
| C. | martensitic |
| D. | none of these |
| Answer» B. ferritic | |
| 18. |
The material of construction of bearings is |
| A. | cast iron |
| B. | babbit metal |
| C. | pig iron |
| D. | steel |
| Answer» C. pig iron | |
| 19. |
Carbon percentage is the same in cast iron and |
| A. | wrought iron |
| B. | pig iron |
| C. | mild steel |
| D. | high silicon (14%) iron |
| Answer» C. mild steel | |
| 20. |
Ceramic recuperators are generally made of |
| A. | silicon carbide. |
| B. | calcium carbide. |
| C. | fireclay bricks. |
| D. | high alumina bricks. |
| Answer» B. calcium carbide. | |
| 21. |
Dielectric strength of a material is |
| A. | its energy stroage capacity. |
| B. | a magnetic property. |
| C. | its capacity to resist the flow of current. |
| D. | its capacity to withstand high voltage. |
| Answer» E. | |
| 22. |
High speed steel tools retain their hardness upto a temperature of __________ °C. |
| A. | 500 |
| B. | 750 |
| C. | 900 |
| D. | 1100 |
| Answer» D. 1100 | |
| 23. |
Sulphur melting pit in the sulphuric acid plant is made of |
| A. | lead lined stainless steel. |
| B. | cast iron. |
| C. | steel or cement-brick lined. |
| D. | hard wood. |
| Answer» D. hard wood. | |
| 24. |
Coke oven regenerators are made of __________ bricks. |
| A. | fire clay |
| B. | silica |
| C. | low thermal conductivity |
| D. | high electrical conductivity |
| Answer» B. silica | |
| 25. |
Karbate is |
| A. | a mixture of iron dust and saw dust. |
| B. | carbon impregnated with resin (usually bakelite). |
| C. | an acid resistant material. |
| D. | both (b) and (c). |
| Answer» E. | |
| 26. |
German silver in an alloy of |
| A. | copper, nickel and zinc. |
| B. | copper, aluminium and silver. |
| C. | silver, zinc and aluminium. |
| D. | silver, nickel and zinc. |
| Answer» B. copper, aluminium and silver. | |
| 27. |
Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the |
| A. | ultimate tensile strength (U.T.S.) |
| B. | endurance limit |
| C. | elastic limit |
| D. | none of these |
| Answer» C. elastic limit | |
| 28. |
'Age hardening' of duralumin is due to |
| A. | copper |
| B. | magnesium |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 29. |
Constituents of stellite are |
| A. | zinc, copper and nickel. |
| B. | cobalt, chromium and tungsten. |
| C. | zinc, aluminium and nickel. |
| D. | nickel, cobalt and vanadium. |
| Answer» C. zinc, aluminium and nickel. | |
| 30. |
Zircalloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium |
| A. | tin, nickel, iron and chromium |
| B. | and graphite |
| C. | and copper |
| D. | none of these |
| Answer» B. and graphite | |
| 31. |
The purpose of nitriding the steel is to |
| A. | harden its surface. |
| B. | soften its surface. |
| C. | improve its reliability. |
| D. | none of these. |
| Answer» B. soften its surface. | |
| 32. |
Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese. |
| A. | 1.5-2 |
| B. | 3.5-4.5 |
| C. | 43715 |
| D. | 41974 |
| Answer» E. | |
| 33. |
Which of the following has the highest compressive strength ? |
| A. | Wrought iron |
| B. | Cast iron |
| C. | Mild steel |
| D. | High carbon steel |
| Answer» E. | |
| 34. |
Acid proof stoneware |
| A. | has very low strength. |
| B. | cannot be heated. |
| C. | is broken by small temperature changes. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 35. |
The main purpose of galvanising iron sheets is to |
| A. | harden the surface. |
| B. | increase its glossiness and lustre. |
| C. | prevent the action of water. |
| D. | prevent the action of oxygen. |
| Answer» D. prevent the action of oxygen. | |
| 36. |
Babbit metal (used for making bearings) comprises of |
| A. | mainly tin (85%) and lead. |
| B. | saw dust and iron dust mixture. |
| C. | zinc and aluminium. |
| D. | copper and aluminium. |
| Answer» B. saw dust and iron dust mixture. | |
| 37. |
The behaviour of visco-elastic material is time dependent. This behaviour is common in __________ materials. |
| A. | non-crystalline solid |
| B. | crystalline |
| C. | rubberry |
| D. | non-crystalline organic polymeric. |
| Answer» E. | |