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.
| 8051. |
Presence of nitrogen in steel |
| A. | makes it brittle. |
| B. | increases its strength. |
| C. | increases its hardness. |
| D. | is desirable. |
| Answer» B. increases its strength. | |
| 8052. |
Trough of an apron conveyor is made of |
| A. | lead lined concrete vessel |
| B. | wood |
| C. | metal |
| D. | either (b) or (c) |
| Answer» E. | |
| 8053. |
Muntz metal is a/an alloys of |
| A. | magnesium & tin |
| B. | ferrous material |
| C. | lead & tin |
| D. | copper & zinc |
| Answer» E. | |
| 8054. |
Rotary kilns in cement industry are lined with____bricks. |
| A. | fireclay |
| B. | silica |
| C. | lead |
| D. | high alumina & high magnesia |
| Answer» E. | |
| 8055. |
Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent. |
| A. | 0.02 |
| B. | 0.2 |
| C. | 0.35 |
| D. | 0.5 |
| Answer» C. 0.35 | |
| 8056. |
Which of the following will have the highest melting point ? |
| A. | Pig iron |
| B. | Mild steel |
| C. | Wrought iron |
| D. | High carbon steel |
| Answer» D. High carbon steel | |
| 8057. |
Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its |
| A. | high strength to weight ratio. |
| B. | low temperature strength properties. |
| C. | its ability to be cast, rolled, forged & stamped. |
| D. | high strength and corrosion & oxidation-resistance at elevated temperature. |
| Answer» B. low temperature strength properties. | |
| 8058. |
Alpha iron is stable __________ C. |
| A. | above 1403 |
| B. | upto 910 |
| C. | above 1800 |
| D. | between 910 & 1403 |
| Answer» C. above 1800 | |
| 8059. |
Babbit metal used for making bearings should have |
| A. | high-co-efficient of friction between journal and bearing. |
| B. | ability to retain lubricant on its surface. |
| C. | low co-efficient of friction between journal and bearing. |
| D. | both(b) & (c). |
| Answer» B. ability to retain lubricant on its surface. | |
| 8060. |
Vessels made of __________ can be used to store dry chlorine. |
| A. | thermoplastic materials |
| B. | nickel |
| C. | steel or iron |
| D. | none of these |
| Answer» D. none of these | |
| 8061. |
For spinning viscose rayon, the extrusion spinnerettes are made of |
| A. | platinum or gold alloys |
| B. | high carbon steel |
| C. | aluminium |
| D. | nickel |
| Answer» B. high carbon steel | |
| 8062. |
Galvanising is generally done on |
| A. | non-ferrous metals |
| B. | low carbon steel |
| C. | stainless steel |
| D. | cast iron |
| Answer» C. stainless steel | |
| 8063. |
Which of the following finds the least commercial use ? |
| A. | Pure iron |
| B. | High silicon iron |
| C. | Low carbon steel |
| D. | High carbon steel |
| Answer» B. High silicon iron | |
| 8064. |
Which of the following is the most widely used insulating material for steam carray-ing pipelines ? |
| A. | Ceramic fibre blanket |
| B. | Glass wool and 85% magnesia |
| C. | Vermiculite |
| D. | Slag wool |
| Answer» C. Vermiculite | |
| 8065. |
Titanium metal |
| A. | exists in three allotropic forms. |
| B. | can not be welded. |
| C. | is used in oceanographic and space exploration applications. |
| D. | none of these. |
| Answer» D. none of these. | |
| 8066. |
Corrosion resistance of steel is increased by the addition of |
| A. | phosphorous and tungsten. |
| B. | nickel and chromium. |
| C. | lead and vanadium. |
| D. | molybdenum and tungsten. |
| Answer» C. lead and vanadium. | |
| 8067. |
Purity of electrical grade aluminium should be __________ percent. |
| A. | 95 |
| B. | 99.5 |
| C. | 85 |
| D. | 90 |
| Answer» C. 85 | |
| 8068. |
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 | |
| 8069. |
In hot wire aneomometer used for gas flow measurement, the wire is normally made of |
| A. | copper |
| B. | platinum |
| C. | constantan |
| D. | chromium |
| Answer» C. constantan | |
| 8070. |
The heat treatment process to which castings and the steel balls produced by cold heading are subjected is |
| A. | tempering |
| B. | normalising |
| C. | annealing |
| D. | none of these |
| Answer» C. annealing | |
| 8071. |
High speed steel tools retain their hardness upto a temperature of __________ C. |
| A. | 500 |
| B. | 750 |
| C. | 900 |
| D. | 1100 |
| Answer» D. 1100 | |
| 8072. |
Dry chlorine can be handled in a vessel made of |
| A. | iron or steel |
| B. | PVC (c) nickel |
| C. | brass |
| Answer» B. PVC (c) nickel | |
| 8073. |
Nickel made/clad equipments are suitable for handling |
| A. | ammonia (both aqueous & anhydrous). |
| B. | fruit juices, milk & its products and caustic soda solution. |
| C. | nitric acid & hydrochloric acid (conc). |
| D. | sulphuric acid (conc). |
| Answer» C. nitric acid & hydrochloric acid (conc). | |
| 8074. |
Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of |
| A. | nickel |
| B. | copper |
| C. | stainless steel |
| D. | brass |
| Answer» C. stainless steel | |
| 8075. |
Brine solution is stored/treated in __________ lined vessels/pipes. |
| A. | rubber |
| B. | lead |
| C. | glass |
| D. | nickel |
| Answer» E. | |
| 8076. |
Beehive coke ovens are made of __________ bricks. |
| A. | silica |
| B. | fireclay |
| C. | silicon carbide |
| D. | corundum |
| Answer» B. fireclay | |
| 8077. |
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 | |
| 8078. |
The material used in the filament of electric bulbs is |
| A. | nichrome |
| B. | tungsten |
| C. | constantan |
| D. | German silver |
| Answer» C. constantan | |
| 8079. |
Dead mild steel, which contains 0.10 to 0.15 percent carbon is used for making |
| A. | shafts |
| B. | flanges |
| C. | gears |
| D. | shear blades |
| Answer» C. gears | |
| 8080. |
Caustic soda can be stored in __________ drums. |
| A. | steel |
| B. | cast iron |
| C. | brass |
| D. | gun metal |
| Answer» B. cast iron | |
| 8081. |
Work hardening of a material |
| A. | decreases its tensile strength. |
| B. | decreases its ductility. |
| C. | increases its ductility. |
| D. | does not affect its ductility. |
| Answer» C. increases its ductility. | |
| 8082. |
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 | |
| 8083. |
Pick out the correct statement. |
| A. | Materials exhibiting high elasticity obey Hooke's law. |
| B. | The elastic behaviour of rubber under compression is the same as its behaviour under tension. |
| C. | The damping capacity of a material is due to its plastic deformation. |
| D. | The stress required to cause plastic flow in polycrystalline material is higher as compared to monocrystalline materials due to the presence of grains of different orientations. |
| Answer» C. The damping capacity of a material is due to its plastic deformation. | |
| 8084. |
Propulsion of rocket follows from the |
| A. | Newton's second law of motion. |
| B. | Newton's third law of motion. |
| C. | law of projectiles. |
| D. | Archimedes principle. |
| Answer» C. law of projectiles. | |
| 8085. |
In order to be called steel, an alloy should have iron percentage greater than |
| A. | 80 |
| B. | 70 |
| C. | 90 |
| D. | 50 |
| Answer» B. 70 | |
| 8086. |
In multipass welds, shot peening is done after each pass to |
| A. | close the surface porosity. |
| B. | break the continuity of columnar grains. |
| C. | flatten the weldment. |
| D. | introduce texture in the weld. |
| Answer» B. break the continuity of columnar grains. | |
| 8087. |
With increase in annealing temperature, the following defect density decreases. |
| A. | Vacancy |
| B. | Dislocation |
| C. | Grain boundary |
| D. | All of them |
| Answer» E. | |
| 8088. |
Broaching tools are usually made of |
| A. | cermets |
| B. | high speed steel |
| C. | tungsten carbide |
| D. | stellite |
| Answer» C. tungsten carbide | |
| 8089. |
__________ circuit is most commonly used to measure strain with the help of a strain gauge. |
| A. | Ballast |
| B. | Voltage balancing potentiometric |
| C. | Simple current sensitive |
| D. | none of these |
| Answer» C. Simple current sensitive | |
| 8090. |
Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines ? |
| A. | Air filter |
| B. | Fuel injector |
| C. | Exhaust silencer |
| D. | Battery |
| Answer» C. Exhaust silencer | |
| 8091. |
Thermistors are used in __________ devices. |
| A. | voltage measuring |
| B. | temperature measuring |
| C. | temperature compensating |
| D. | both (b) & (c) |
| Answer» E. | |
| 8092. |
__________ is a special constituent of chlorophyll without which photosynthesis is not possible. |
| A. | Calcium |
| B. | Nitrogen |
| C. | Phosphorous |
| D. | Hydrogen |
| Answer» C. Phosphorous | |
| 8093. |
Carnot cycle is also termed as the constant __________ cycle in thermodynamics. |
| A. | entropy |
| B. | pressure |
| C. | volume |
| D. | heat |
| Answer» E. | |
| 8094. |
__________ is used as a material of construction for the blade of power saw. |
| A. | Wrought iron |
| B. | Stainless steel |
| C. | Mild steel |
| D. | High speed steel |
| Answer» E. | |
| 8095. |
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to |
| A. | time |
| B. | square root of time |
| C. | square of time |
| D. | cube of time |
| Answer» C. square of time | |
| 8096. |
Satellites burn off during re-entry to earth's atmosphere, because of the |
| A. | combustion with air. |
| B. | gravitational pull by earth. |
| C. | friction with earth's atmosphere. |
| D. | loss in weight of the satellite. |
| Answer» D. loss in weight of the satellite. | |
| 8097. |
With increase in compression ratio, the volumetric efficiency of air compressor |
| A. | increases. |
| B. | decreases. |
| C. | remains same. |
| D. | may increase or decrease (depends on the suction pressure). |
| Answer» B. decreases. | |
| 8098. |
Neutrons are present in all atoms except that of |
| A. | He |
| B. | C |
| C. | H |
| D. | Ar |
| Answer» D. Ar | |
| 8099. |
Biological shield in a nuclear reactor is generally provided to protect against the |
| A. | -rays |
| B. | -rays |
| C. | gamma rays & neutrons |
| D. | electrons |
| Answer» D. electrons | |
| 8100. |
Case hardening is not done by |
| A. | nitriding |
| B. | hot dipping |
| C. | electroplating |
| D. | both b & c |
| Answer» E. | |