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.
| 8001. |
Which of the following has a very high carbide forming tendency in steels ? |
| A. | Silicon |
| B. | Chromium |
| C. | Nickel |
| D. | Vanadium |
| Answer» E. | |
| 8002. |
The most distinguished property of malleable cast iron is its high |
| A. | ductility |
| B. | hardness |
| C. | malleability |
| D. | none of these |
| Answer» B. hardness | |
| 8003. |
Corrosion resisting properties of cast iron are significantly improved by the addition of 12 - 15% of |
| A. | tungsten |
| B. | vanadium |
| C. | silicon |
| D. | all (a), (b) & (c) |
| Answer» D. all (a), (b) & (c) | |
| 8004. |
Silicon percentage in iron castings to have maximum hardness should be about |
| A. | 0.3 |
| B. | 0.5 |
| C. | 0.8 |
| D. | 2.5 |
| Answer» D. 2.5 | |
| 8005. |
Nickel as a material of construction |
| A. | is used as an alloying element for both ferrous & non-ferrous alloys. |
| B. | is paramagnetic below 415 C (its Curie temperature). |
| C. | dimagnetic. |
| D. | has a body centred cubic (bcc) crystal lattice structure. |
| Answer» B. is paramagnetic below 415 C (its Curie temperature). | |
| 8006. |
__________ moulding process can not be used for thermoplastic plastics. |
| A. | Compression |
| B. | Extrusion |
| C. | Injection |
| D. | None of these |
| Answer» D. None of these | |
| 8007. |
Which of the following crystal structures characterises the ferritic stainless steel ? |
| A. | Face centred cubic |
| B. | Body centred cubic |
| C. | Simple hexagonal |
| D. | None of these |
| Answer» C. Simple hexagonal | |
| 8008. |
'Semi steel' is |
| A. | produced by adding 10-20% steel to the cupola charge. |
| B. | stronger than cast iron. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 8009. |
Tin coating on metals is not done by |
| A. | spraying |
| B. | powder metallurgy |
| C. | hot dipping |
| D. | electro-deposition |
| Answer» C. hot dipping | |
| 8010. |
The softest material just next to talc in the Mho's scale is |
| A. | quartz |
| B. | gypsum |
| C. | feldspar |
| D. | fluorite |
| Answer» C. feldspar | |
| 8011. |
Pick out the wrong statement |
| A. | Hardening makes the steel more brittle. |
| B. | High alloy steels contain more than 50% alloying element. |
| C. | 18/8 stainless steel is a magnetic steel. |
| D. | both (b) and (c) |
| Answer» E. | |
| 8012. |
18/8 stainless steel means, that it contains |
| A. | 18% chromium and 8% nickel. |
| B. | 18% chromium and 8% molybdenum. |
| C. | 18% nickel and 8% chromium. |
| D. | 18% molybdenum and 8% chromium. |
| Answer» B. 18% chromium and 8% molybdenum. | |
| 8013. |
Glass is corroded by |
| A. | fluorine (dry or wet) |
| B. | sulphuric acid |
| C. | phosphoric acid |
| D. | none of these |
| Answer» B. sulphuric acid | |
| 8014. |
Iron alloyed with carbon upto 2% is called |
| A. | pig iron |
| B. | wrought iron |
| C. | high carbon steel |
| D. | none of these |
| Answer» E. | |
| 8015. |
Duriron is |
| A. | acid resistant, brittle and very hard. |
| B. | high silicon iron. |
| C. | prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 8016. |
Cast iron detachable joint is used in __________ pipes. |
| A. | steel |
| B. | cast iron |
| C. | asbestos cement |
| D. | reinforced cement concrete |
| Answer» B. cast iron | |
| 8017. |
Generally __________ are subjected to galvanising (i.e., zinc coating). |
| A. | non-ferrous metals |
| B. | non-metals |
| C. | low carbon steels |
| D. | stainless steel |
| Answer» D. stainless steel | |
| 8018. |
When the steel is subjected to normalising, its __________ decreases. |
| A. | yield point |
| B. | ductility |
| C. | ultimate tensile strength (UTS) |
| D. | none of these |
| Answer» C. ultimate tensile strength (UTS) | |
| 8019. |
Brinell Hardness Number (BHN) for talc is approximately in the range of |
| A. | 1-5 |
| B. | 20-30 |
| C. | 100 -150 |
| D. | 200 - 250 |
| Answer» C. 100 -150 | |
| 8020. |
Dies for wire drawing are generally made of |
| A. | mild steel |
| B. | stainless steel |
| C. | carbides |
| D. | high carbon steel |
| Answer» D. high carbon steel | |
| 8021. |
Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of |
| A. | brass |
| B. | copper |
| C. | high carbon steel |
| D. | aluminium |
| Answer» B. copper | |
| 8022. |
A material no longer behaves elastically beyond |
| A. | plastic limit |
| B. | limiting load |
| C. | elastic limit |
| D. | breaking load |
| Answer» D. breaking load | |
| 8023. |
Which of the following contains maximum percentage of carbon ? |
| A. | Boiler plate steel |
| B. | Rail steel |
| C. | Saws for cutting steel |
| D. | Railway spring steel |
| Answer» D. Railway spring steel | |
| 8024. |
Silicon percentage in acid resistant cast iron is about |
| A. | 4 |
| B. | 8 |
| C. | 14 |
| D. | 20 |
| Answer» D. 20 | |
| 8025. |
Concentrated HCl at 30 C can be stored in a vessel made of |
| A. | PTFE and porcelain. |
| B. | cast iron and aluminium. |
| C. | stainless steel and high silicon cast iron. |
| D. | none of these. |
| Answer» B. cast iron and aluminium. | |
| 8026. |
Which of the following stainless steels is non-magnetic ? |
| A. | Ferritic |
| B. | Martensitic |
| C. | Austenitic |
| D. | None of these |
| Answer» D. None of these | |
| 8027. |
A magnetic material becomes __________ above the Curie temperature. |
| A. | ferromagnetic |
| B. | diamagnetic |
| C. | paramagnetic |
| D. | none of these |
| Answer» D. none of these | |
| 8028. |
Which of the following is not a non-ferrous alloy ? |
| A. | Meehanite |
| B. | Magnalium |
| C. | Gun metal |
| D. | Muntz metal |
| Answer» B. Magnalium | |
| 8029. |
Dilute sulphuric acid is transported in __________ pipes. |
| A. | mild steel |
| B. | lead |
| C. | copper |
| D. | special alloys |
| Answer» C. copper | |
| 8030. |
__________ alloys have the highest specific strength of all the structural materials out of the following. |
| A. | Magnetic steel |
| B. | Titanium |
| C. | Chromium |
| D. | Magnesium |
| Answer» C. Chromium | |
| 8031. |
100% H2SO4 at 30 C can't be stored in a vessel made/lined with |
| A. | cast iron and high silicon iron. |
| B. | mild steel and stainless steel. |
| C. | aluminium, tin and rubber. |
| D. | teflon, glass and porcelain. |
| Answer» D. teflon, glass and porcelain. | |
| 8032. |
Carbon content in plain carbon steel is __________ percent. |
| A. | 0.1 to 0.15 |
| B. | 0.35 to 0.45 |
| C. | 0.65 to 0.80 |
| D. | 0.85 to 1.2 |
| Answer» C. 0.65 to 0.80 | |
| 8033. |
Duralumin is an alloy of |
| A. | aluminium, copper and manganese. |
| B. | aluminium, nickel and silicon. |
| C. | aluminium and nickel. |
| D. | none of these. |
| Answer» B. aluminium, nickel and silicon. | |
| 8034. |
The ability of a material to offer resistance to scratching or indentation is a measure of its |
| A. | brittleness |
| B. | toughness |
| C. | hardness |
| D. | resilience |
| Answer» D. resilience | |
| 8035. |
Tempering of steel is done to make it |
| A. | brittle |
| B. | hard |
| C. | rollable |
| D. | soft |
| Answer» E. | |
| 8036. |
Which of the following is the most elastic material ? |
| A. | Plastic |
| B. | Glass |
| C. | Steel |
| D. | Rubber |
| Answer» D. Rubber | |
| 8037. |
Water gas generator is made of |
| A. | carbon steel-brick lined |
| B. | stainless steel-lead lined |
| C. | cast iron |
| D. | high carbon steel-procelain lined |
| Answer» B. stainless steel-lead lined | |
| 8038. |
The digester of a Gobar gas plant is a |
| A. | mild steel drum |
| B. | stainless steel vessel |
| C. | masonry well |
| D. | cast iron vessel |
| Answer» D. cast iron vessel | |
| 8039. |
Brine (15% concentration) can be stored in a vessel made of |
| A. | monel |
| B. | karbate |
| C. | cast iron |
| D. | none of these |
| Answer» B. karbate | |
| 8040. |
The most commonly used resin for making reinforced plastic is |
| A. | unsaturated polyester |
| B. | polypropylene |
| C. | polyurathane |
| D. | nylon-6 |
| Answer» B. polypropylene | |
| 8041. |
Most suitable material for high pressure vessel operating at 500 atm. and 500 C is |
| A. | molybdenum stainless steel. |
| B. | 18/8 stainless steel. |
| C. | mild steel. |
| D. | high silicon iron (14% Si). |
| Answer» B. 18/8 stainless steel. | |
| 8042. |
Anodic material used for the cathodic protection of underground buried steel pipeline is |
| A. | nickel or copper |
| B. | zinc or magnesium |
| C. | bronze |
| D. | brass |
| Answer» C. bronze | |
| 8043. |
Bush bearings are made of |
| A. | mild steel |
| B. | phosphorous bronze |
| C. | white metal alloys |
| D. | none of these |
| Answer» C. white metal alloys | |
| 8044. |
Alinco, which is a aluminium-cobalt-nickel steel, is used for making |
| A. | surgical instruments |
| B. | powerful magnets |
| C. | chemical equipments |
| D. | boiler tubes |
| Answer» C. chemical equipments | |
| 8045. |
Slow plastic deformation of metals under a constant stress is termed as __________ failure. |
| A. | fatigue |
| B. | endurance |
| C. | creep |
| D. | none of these |
| Answer» D. none of these | |
| 8046. |
Amount of energy that a material can absorb before its fracture is a measure of its |
| A. | toughness |
| B. | resilience |
| C. | malleability |
| D. | ductility |
| Answer» B. resilience | |
| 8047. |
Carbon is present in the combined form (carbide) in case of |
| A. | pig iron |
| B. | steel |
| C. | ferroalloys |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 8048. |
Chilled iron castings are |
| A. | easily machinable |
| B. | soft on surface |
| C. | highly wear resistant |
| D. | none of these |
| Answer» D. none of these | |
| 8049. |
A hardness depth of about 3 mm can be achieved by induction hardness in __________ seconds. |
| A. | 5 |
| B. | 100 |
| C. | 250 |
| D. | 500 |
| Answer» B. 100 | |
| 8050. |
Very high sulphur in pig iron makes |
| A. | its casting unsound. |
| B. | its hard and machinable. |
| C. | its brittle and malleable. |
| D. | all (a), (b) & (c) |
| Answer» B. its hard and machinable. | |