MCQOPTIONS
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MCQOPTIONS
This section includes 4791 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1901. |
Duralumin has better strength than Y-alloy at high temperature. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1902. |
A steel containing 16 to 18% chromium and about 0.12% carbon is called |
| A. | ferritic stainless steel |
| B. | austenitic stainless steel |
| C. | martensitic stainless steel |
| D. | nickel steel |
| Answer» B. austenitic stainless steel | |
| 1903. |
Normalising of steel is done to |
| A. | refine the grain structure |
| B. | remove strains caused by cold working |
| C. | remove dislocations caused in the internal structuure due to hot working |
| D. | all of the above |
| Answer» E. | |
| 1904. |
The material in which the atoms are arranged chaotically, is called |
| A. | amorphous material |
| B. | mesomorphous material |
| C. | crystalline material |
| D. | none of these |
| Answer» B. mesomorphous material | |
| 1905. |
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite. |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» C. more than | |
| 1906. |
A steel containing 12 to 14% chromium and 0.12 to 0.35% carbon is called martensitic stainless steel. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1907. |
In basic bessemer process, the furnace is lined with |
| A. | silica bricks |
| B. | a mixture of tar and burnt dolomite bricks |
| C. | either (a) or (b) |
| D. | none of these |
| Answer» C. either (a) or (b) | |
| 1908. |
Polyvinylchloride (PVC) is a __________ material. |
| A. | thermoplastic |
| B. | thermosetting |
| Answer» B. thermosetting | |
| 1909. |
In a unit cell of close packed hexagonal space lattice, there are twenty four atoms. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 1910. |
When filing or machining cast iron makes our hands black, then it shows that __________ is present in cast iron. |
| A. | cementite |
| B. | free graphite |
| Answer» C. | |
| 1911. |
According to Indian standard specifications, a plain carbon steel designated by 40 C8 means that the carbon content is |
| A. | 0.04% |
| B. | 0.35 to 0.45% |
| C. | 0.4 to 0.6% |
| D. | 0.6 to 0.8% |
| Answer» C. 0.4 to 0.6% | |
| 1912. |
The ratio of the volume occupied by the atoms to the total volume of the unit cell is called |
| A. | coordination number |
| B. | atomic packing factor |
| C. | space lattice |
| D. | none of these |
| Answer» C. space lattice | |
| 1913. |
The purpose of heat treatment is to |
| A. | relieve the stresses set up in the material after hot or cold working |
| B. | modify the structure of the material |
| C. | change grain size |
| D. | any one of these |
| Answer» E. | |
| 1914. |
In the lower part of the blast furnace (zone of fusion), the temperature is |
| A. | 400 to 700 C |
| B. | 800 C to 1000 C |
| C. | 1200 C to 1300 C |
| D. | 1500 C to 1700 C |
| Answer» D. 1500 C to 1700 C | |
| 1915. |
Wrought iron |
| A. | is a ductile material |
| B. | can be easily forged or welded |
| C. | cannot stand sudden and excessive shocks |
| D. | all of these |
| Answer» E. | |
| 1916. |
Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal? |
| A. | Silicon |
| B. | Sulphur |
| C. | Manganese |
| D. | Phosphorus |
| Answer» B. Sulphur | |
| 1917. |
The ability of a material to resist fracture due to high impact loads, is called |
| A. | strength |
| B. | stiffness |
| C. | toughness |
| D. | brittleness |
| Answer» D. brittleness | |
| 1918. |
Grey cast iron is __________ than white cast iron. |
| A. | softer |
| B. | harder |
| Answer» B. harder | |
| 1919. |
Which of the following statement is incorrect about duralumin? |
| A. | It is prone to age hardening |
| B. | It can be forged |
| C. | It has good machining properties |
| D. | It is lighter than pure aluminium |
| Answer» E. | |
| 1920. |
The property of a material which enables it to retain the deformation permanently, is called |
| A. | brittleness |
| B. | ductility |
| C. | malleability |
| D. | plasticity |
| Answer» E. | |
| 1921. |
Cast iron is a ductile material. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 1922. |
Manganese is added in low carbon steel to |
| A. | make the steel tougher and harder |
| B. | raise the yield point |
| C. | make the steel ductile and of good bending qualities |
| D. | all of the above |
| Answer» D. all of the above | |
| 1923. |
In iron, the presence of carbon in free form is called graphite. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 1924. |
In a body centred cubic space lattice, there are nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 1925. |
Macro-structure of a material is, generally, examined by |
| A. | naked eye |
| B. | optical microscope |
| C. | metallurgical microscope |
| D. | X-ray techniques |
| Answer» B. optical microscope | |
| 1926. |
Aluminium has low density and addition of silicon improves its fluidity and therefore, its castability. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 1927. |
Ball bearings are, usually, made from |
| A. | low carbon steel |
| B. | high carbon steel |
| C. | medium carbon steel |
| D. | chrome steel |
| Answer» E. | |
| 1928. |
Sulphur in cast iron |
| A. | makes the iron soft and easily machinable |
| B. | increases hardness and brittleness |
| C. | makes the iron white and hard |
| D. | aids fusibility and fluidity |
| Answer» C. makes the iron white and hard | |
| 1929. |
Which of the following property is desirable for materials used in tools and machines? |
| A. | Elasticity |
| B. | Plasticity |
| C. | Ductility |
| D. | Malleability |
| Answer» B. Plasticity | |
| 1930. |
Babbit metal is a |
| A. | lead-base alloy |
| B. | copper-base alloy |
| C. | tin-base alloy |
| D. | cadmium-base alloy |
| Answer» D. cadmium-base alloy | |
| 1931. |
The metal suitable for bearings subjected to heavy loads, is |
| A. | silicon bronze |
| B. | white metal |
| C. | monel metal |
| D. | phosphor bronze |
| Answer» C. monel metal | |
| 1932. |
Cementite consist of |
| A. | 13% carbon and 87% ferrite |
| B. | 13% cementite and 87% ferrite |
| C. | 13% ferrite and 87% cementite |
| D. | 6.67% carbon and 93.33% iron |
| Answer» E. | |
| 1933. |
Corrosion resistance of steel is increased by adding nickel and chromium. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 1934. |
The silicon steel is widely used for |
| A. | connecting rods |
| B. | cutting tools |
| C. | generators and transformers in the form of laminated cores |
| D. | motor car crankshafts |
| Answer» D. motor car crankshafts | |
| 1935. |
The alloying element which reduces the formation of iron sulphide in steel is |
| A. | chromium |
| B. | nickel |
| C. | vanadium |
| D. | manganese |
| Answer» E. | |
| 1936. |
For a steel containing 0.8% carbon |
| A. | there is no critical point |
| B. | there is only one critical point |
| C. | there are two critical points |
| D. | there can be any number of critical points |
| Answer» C. there are two critical points | |
| 1937. |
Gamma-iron occurs between the temperature range of |
| A. | 400 C to 600 C |
| B. | 600 C to 900 C |
| C. | 900 C to 1400 C |
| D. | 1400 C to 1530 C |
| Answer» D. 1400 C to 1530 C | |
| 1938. |
The portion of the blast furnace below its widest cross-section is called |
| A. | hearth |
| B. | stack |
| C. | bosh |
| D. | throat |
| Answer» D. throat | |
| 1939. |
In high speed steels, manganese is used to tougher the metal and to increase its |
| A. | yield point |
| B. | critical temperature |
| C. | melting point |
| D. | hardness |
| Answer» C. melting point | |
| 1940. |
The machinability of aluminium increases when __________ is added to aluminium. |
| A. | copper |
| B. | magnesium |
| C. | silicon |
| D. | lead and bismuth |
| Answer» E. | |
| 1941. |
There are fourteen atoms in a unit cell of |
| A. | body centred cubic space lattice |
| B. | face centred cubic space lattice |
| C. | close packed hexagonal space lattice |
| D. | none of these |
| Answer» C. close packed hexagonal space lattice | |
| 1942. |
In spheroidising process, the steel is |
| A. | heated below the lower critical temperature and then cooled slowly |
| B. | heated upto the lower critical temperature and then cooled in still air |
| C. | heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600 C |
| D. | none of the above |
| Answer» D. none of the above | |
| 1943. |
The process of inducing carbon to __________ carbon steels in order to give it a hard surface is known as carburising. |
| A. | low |
| B. | medium |
| C. | high |
| Answer» B. medium | |
| 1944. |
The malleability is the property of a material due to which it can be rolled or hammered into thin sheets. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 1945. |
Pearlite is a combination of 87% ferrite and 13% cementite. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 1946. |
The percentage carbon content in wrought iron is about |
| A. | 0.02 |
| B. | 0.1 |
| C. | 02 |
| D. | 0.4 |
| Answer» B. 0.1 | |
| 1947. |
Which of the following solids are malleable and ductile? |
| A. | Ionic solids |
| B. | Covalent solids |
| C. | Metallic solids |
| D. | none of these |
| Answer» D. none of these | |
| 1948. |
The delta-iron possesses a body centred cubic space lattice. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 1949. |
Thermosetting plastics are those materials which |
| A. | are formed into shape under heat and pressure and results in a permanently hard product |
| B. | do not become hard with the application of heat and pressure and no chemical change occurs |
| C. | are flexible and can withstand considerable wear under suitable conditions |
| D. | are used as a friction lining for clutches and brakes |
| Answer» B. do not become hard with the application of heat and pressure and no chemical change occurs | |
| 1950. |
Admirality gun metal contains |
| A. | 60% copper, 35% zinc and 5% manganese |
| B. | 76% copper, 20% silicon and 4% zinc |
| C. | 82% copper, 12% zinc and 6% manganese |
| D. | 88% copper, 10% tin and 2% zinc |
| Answer» E. | |