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.
| 1951. |
The percentage of phosphorus is phosphor bronze is |
| A. | 0.1 |
| B. | 1 |
| C. | 11.1 |
| D. | 98 |
| Answer» B. 1 | |
| 1952. |
In high speed steels, vanadium adds to the property of red hardness and tungsten and chromium add to high wear resistance. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1953. |
For the pipe fitting like elbow, tee, union etc., which of the following is preferred? |
| A. | Pig iron |
| B. | Malleable iron |
| C. | Spheroidal graphite cast iron |
| D. | High carbon steel |
| Answer» C. Spheroidal graphite cast iron | |
| 1954. |
Monel metal contains |
| A. | 65% nickel, 15% chromium and 20% iron |
| B. | 68% nickel, 29% copper and 3% other constituents |
| C. | 80% nickel and 20% chromium |
| D. | 80% nickel, 14% chromium and 6% iron |
| Answer» C. 80% nickel and 20% chromium | |
| 1955. |
A fine grained steel |
| A. | is less tough and has a greater tendency to distort during heat treatment |
| B. | is more ductile and has a less tendency to distort during heat treatment |
| C. | is less tough and has a less tendency to distort during heat treatment |
| D. | is more ductile and has a greater tendency to distort during heat treatment |
| Answer» C. is less tough and has a less tendency to distort during heat treatment | |
| 1956. |
Iron-carbon alloys containing 4.3% carbon are known as hypo-eutectic cast irons. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 1957. |
The approximate height of a blast furnace is |
| A. | 10 m |
| B. | 20 m |
| C. | 30 m |
| D. | 40 m |
| Answer» D. 40 m | |
| 1958. |
A steel alloy containing 36% nickel is called |
| A. | stainless steel |
| B. | high speed steel |
| C. | invar |
| D. | heat resisting steel |
| Answer» D. heat resisting steel | |
| 1959. |
Nichrome contains more iron than Inconel. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 1960. |
Hardness of steel is increased by adding sulphur, lead and phosphorus. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 1961. |
The temperature point at which the change ends on heating the steel is called |
| A. | lower critical point |
| B. | upper critical point |
| C. | point of recalescence |
| D. | point of decalescence |
| Answer» C. point of recalescence | |
| 1962. |
Which of the following material has maximum malleability? |
| A. | Lead |
| B. | Soft steel |
| C. | Wrought iron |
| D. | Copper |
| Answer» B. Soft steel | |
| 1963. |
Chilled cast iron is produced |
| A. | by adding magnesium to molten cast iron |
| B. | by quick cooling of molten cast iron |
| C. | from white cast iron by annealing process |
| D. | none of these |
| Answer» C. from white cast iron by annealing process | |
| 1964. |
German silver contains |
| A. | 70% copper and 30% zinc |
| B. | 60% copper and 40% zinc |
| C. | 59% copper, 40% zinc and 1% tin |
| D. | 60.45% copper, 35.2% zinc and 5.35% nickel |
| Answer» E. | |
| 1965. |
The high speed steel has __________ percentage of tungsten. |
| A. | maximum |
| B. | minimum |
| Answer» B. minimum | |
| 1966. |
The essential constituent of a hardened steel is |
| A. | pearlite |
| B. | austenite |
| C. | martensite |
| D. | troostite |
| Answer» D. troostite | |
| 1967. |
Which of the following iron exists at 910 C? |
| A. | -iron |
| B. | -iron |
| C. | -iron |
| D. | -iron |
| Answer» B. -iron | |
| 1968. |
The iron ore mostly used for the production of pig iron is |
| A. | magnetite |
| B. | haematite |
| C. | limonite |
| D. | siderite |
| Answer» C. limonite | |
| 1969. |
In a close packed hexagonal space lattice, there are |
| A. | nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre |
| B. | twelve atoms, all of which are located at the twelve corners of a hexagonal prism |
| C. | fourteen atoms out of which eight atoms are located at the coners of the cube and six atoms at the centres of six faces |
| D. | none of the above |
| Answer» E. | |
| 1970. |
The cutting tools are made from |
| A. | nickel steel |
| B. | chrome steel |
| C. | nickel-chrome steel |
| D. | high speed steel |
| Answer» E. | |
| 1971. |
The maximum solubility of carbon in austenite is 1.7% at 1130 C. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 1972. |
The steel widely used for making precision measuring instruments is |
| A. | nickel steel |
| B. | nickel-chrome steel |
| C. | high speed steel |
| D. | chrome-vanadium steel |
| Answer» B. nickel-chrome steel | |
| 1973. |
Cast iron has |
| A. | high compressive strength |
| B. | excellent machinability |
| C. | good casting characteristic |
| D. | all of these |
| Answer» E. | |
| 1974. |
The ductility is the property of a material due to which it |
| A. | can be drawn into wires |
| B. | breaks with little permanent distortion |
| C. | can be rolled or hammered into thin sheets |
| D. | can resist fracture due to high impact loads |
| Answer» B. breaks with little permanent distortion | |
| 1975. |
In a unit cell of a body centred cubic space lattice, there are __________ atoms. |
| A. | six |
| B. | nine |
| C. | fourteen |
| D. | seventeen |
| Answer» C. fourteen | |
| 1976. |
The nuts and bolts are made from silicon steel. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 1977. |
Silicon 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» B. increases hardness and brittleness | |
| 1978. |
The process which improves the machinability of steels, but lowers the hardness and tensile strength, is |
| A. | normalising |
| B. | full annealing |
| C. | process annealing |
| D. | spheroidising |
| Answer» E. | |
| 1979. |
The machine tool guide ways are usually hardened by |
| A. | vacuum hardening |
| B. | martempering |
| C. | induction hardening |
| D. | flame hardening |
| Answer» E. | |
| 1980. |
A steel with 0.8% carbon is known as |
| A. | eutectoid steel |
| B. | hyper-eutectoid steel |
| C. | hypo-eutectiod steel |
| D. | none of these |
| Answer» B. hyper-eutectoid steel | |
| 1981. |
When a steel containing more than 0.8% carbon is cooled slowly below the lower critical point, it consists of |
| A. | mainly pearlite |
| B. | mainly ferrite |
| C. | ferrite and pearlite |
| D. | pearlite and cementite |
| Answer» E. | |
| 1982. |
Silicon is added in low carbon steels to |
| A. | make the steel tougher and harder |
| B. | make the steel of good bending qualities |
| C. | raise the yield point |
| D. | all of these |
| Answer» B. make the steel of good bending qualities | |
| 1983. |
According to Indian standard specifications, cast iron designated by 'FG 150' means |
| A. | white cast iron with B.H.N. 150 |
| B. | white cast iron with 150 MPa as minimum compressive strength |
| C. | grey cast iron with B.H.N. 150 |
| D. | grey cast iron with 150 MPa as minimum tensile strength |
| Answer» E. | |
| 1984. |
Babbit metal contains |
| A. | 50% tin and 50% antimony |
| B. | 66% tin, 30% copper and 4% antimony |
| C. | 88% tin, 4% copper and 8% antimony |
| D. | 92% tin, 6% copper and 2% antimony |
| Answer» D. 92% tin, 6% copper and 2% antimony | |
| 1985. |
The red flame during the operation of a bessemer converter indicates that the |
| A. | air is burning out silicon and manganese |
| B. | silicon and manganese has burned out and carbon has started oxidising |
| C. | converter must be tilted to remove the contents of the converter |
| D. | red flame does not occur during the operation of a bessemer converter |
| Answer» E. | |
| 1986. |
Phosphor bronze has |
| A. | high resistance to corrosion |
| B. | good wearing qualities and high elasticity |
| C. | valuable cold working property |
| D. | all of these |
| Answer» C. valuable cold working property | |
| 1987. |
Body centred cubic space lattice is found in |
| A. | zinc, magnesinm, cobalt, cadmium, antimony and bismuth |
| B. | gamma-iron, aluminium, copper, lead, silver and nickel |
| C. | alpha-iron, tungsten, chromium and molybdenum |
| D. | none of the above |
| Answer» D. none of the above | |
| 1988. |
Nickel when added to copper improves |
| A. | machinability |
| B. | hardness |
| C. | hardness and strength |
| D. | strength and ductility |
| Answer» C. hardness and strength | |
| 1989. |
Inconel contains |
| A. | 65% nickel, 15% chromium and 20% iron |
| B. | 68% nickel, 29% copper and 3% other constituents |
| C. | 80% nickel and 20% chromium |
| D. | 80% nickel, 14% chromium and 6% iron |
| Answer» E. | |
| 1990. |
In a hardening process, the hypo-eutectoid steel is |
| A. | heated from 30 C to 50 C above the upper critical temperature and then cooled in still air |
| B. | heated from 30 C to 50 C above the upper critical temperature and then cooled suddenly in a suitable cooling medium |
| C. | heated from 30 C to 50 C above the upper critical temperature and then cooled slowly in the furnace |
| D. | heated below or close to the lower critical temperature and then cooled slowly |
| Answer» C. heated from 30 C to 50 C above the upper critical temperature and then cooled slowly in the furnace | |
| 1991. |
When a steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of |
| A. | mainly ferrite |
| B. | mainly pearlite |
| C. | ferrite and pearlite |
| D. | pearlite and cementite |
| Answer» D. pearlite and cementite | |
| 1992. |
Eutectoid reaction occurs at |
| A. | 600 C |
| B. | 723 C |
| C. | 1147 C |
| D. | 1493 C |
| Answer» C. 1147 C | |
| 1993. |
The addition of copper to aluminium possesses maximum strength after heat treatment and age-hardening |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 1994. |
The compressive strength of cast iron is __________ that of its tensile strength. |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» D. | |
| 1995. |
An alloy of copper, tin and zinc is known as |
| A. | brass |
| B. | bronze |
| C. | gun metal |
| D. | muntz metal |
| Answer» D. muntz metal | |
| 1996. |
Which of the following gives the correct order of increasing hot hardness of cutting tool materials? |
| A. | Diamond, Carbide, High speed steel |
| B. | Carbide, Diamond, High speed steel |
| C. | High speed steel, Carbide, Diamond |
| D. | High speed steel, Diamond, Carbide |
| Answer» D. High speed steel, Diamond, Carbide | |
| 1997. |
The slag from the blast furnace |
| A. | is used as a ballast for rail road |
| B. | is mixed with tar for road making |
| C. | consists of calcium, aluminium and ferrous silicates |
| D. | all of the above |
| Answer» E. | |
| 1998. |
Tin base white metals are used where the bearings are subjected to |
| A. | large surface wear |
| B. | elevated temperatures |
| C. | light load and pressure |
| D. | high pressure and load |
| Answer» B. elevated temperatures | |
| 1999. |
Which of the following is a mesomorphous material? |
| A. | Mica |
| B. | Silver |
| C. | Lead |
| D. | Brass |
| Answer» B. Silver | |
| 2000. |
Face centred cubic space lattice is found in gamma-iron, aluminium, copper, lead, silver and nickel. |
| A. | True |
| B. | False |
| Answer» B. False | |