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.
| 5951. |
For the transportation of ultrafine particles, the equipment used is a........conveyor. |
| A. | belt |
| B. | pneumatic |
| C. | screw |
| D. | none of these |
| Answer» C. screw | |
| 5952. |
Limestone is normally crushed in a |
| A. | roll crusher |
| B. | hammer crusher |
| C. | ball mill |
| D. | tube mill |
| Answer» C. ball mill | |
| 5953. |
The main differentiation factor between tube mill and ball mill is the |
| A. | length to diameter ratio. |
| B. | size of the grinding media. |
| C. | final product size. |
| D. | operating speed. |
| Answer» B. size of the grinding media. | |
| 5954. |
A __________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream. |
| A. | thickener |
| B. | classifier |
| C. | strainer |
| D. | clarifier |
| Answer» D. clarifier | |
| 5955. |
Separation of a suspension or slurry into a supernatant clear liquid (free from particles) and a thick sludge containing a high concentration of solid is called |
| A. | classification |
| B. | sedimentation |
| C. | clarification |
| D. | decantation |
| Answer» C. clarification | |
| 5956. |
Reciprocal of sphericity is termed as the |
| A. | specific surface ratio |
| B. | shape factor |
| C. | sauter diameter |
| D. | surface area per unit mass |
| Answer» C. sauter diameter | |
| 5957. |
With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | increases linearly |
| Answer» B. decreases | |
| 5958. |
A propeller agitator |
| A. | produces mainly axial flow. |
| B. | is used for mixing high viscosity pastes. |
| C. | runs at very slow speed (2 rpm). |
| D. | all (a), (b) and (c) |
| Answer» B. is used for mixing high viscosity pastes. | |
| 5959. |
In a grinding operation, the limiting particle size is the size of the __________ particle in the sample. |
| A. | smallest |
| B. | largest |
| C. | either (a) or (b) |
| D. | neither (a) nor (b) |
| Answer» E. | |
| 5960. |
The inlet pressure in a constant rate filtration |
| A. | increases continuously |
| B. | decreases gradually |
| C. | remains constant |
| D. | none of these |
| Answer» B. decreases gradually | |
| 5961. |
Size reduction of moulding powders, waxes, resins & gums are done in a __________ mill. |
| A. | cage |
| B. | hammer |
| C. | both (a) & (b) |
| D. | id) neither (a) nor (b) |
| Answer» D. id) neither (a) nor (b) | |
| 5962. |
Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is __________ microns. |
| A. | < 5 |
| B. | 10 to 25 |
| C. | < 74 |
| D. | > 1000 |
| Answer» D. > 1000 | |
| 5963. |
For benefication of iron ore, the most commonly used method is |
| A. | flocculation. |
| B. | froth floatation. |
| C. | jigging & tabling. |
| D. | none of these. |
| Answer» D. none of these. | |
| 5964. |
The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the |
| A. | venturi atomiser |
| B. | gravity settling chamber |
| C. | electro-static precipitator |
| D. | cyclone separator |
| Answer» D. cyclone separator | |
| 5965. |
Fatigue strength of a material increases by |
| A. | having notches in the specimen |
| B. | rise in temperature |
| C. | under stressing the specimen |
| D. | having scratches on the surface |
| Answer» D. having scratches on the surface | |
| 5966. |
Specify the material of construction suitable for handling concentrated HNO3 at 100 C. |
| A. | High silicon iron, Kel-F and teflon |
| B. | Tin and wood |
| C. | Silicone rubber |
| D. | Stainless steel |
| Answer» B. Tin and wood | |
| 5967. |
Aluminium storage vessel can be used to store |
| A. | aqua regia |
| B. | ferrous sulphate |
| C. | hydrochloric acid (10%) |
| D. | none of these |
| Answer» E. | |
| 5968. |
Silicone rubber is not resistant to the corrosive action of |
| A. | sulphuric acid (10%) |
| B. | sulphuric acid (95%) |
| C. | ether |
| D. | both (b) and (c) |
| Answer» E. | |
| 5969. |
Which metal is protected by the layer of its own oxide ? |
| A. | Iron |
| B. | Silver |
| C. | Calcium |
| D. | Aluminium |
| Answer» E. | |
| 5970. |
__________ is never shipped in glass carboys. |
| A. | Ammonia |
| B. | Acetic acid |
| C. | Phenol |
| D. | Formaldehyde |
| Answer» B. Acetic acid | |
| 5971. |
Lead is |
| A. | not resistant to corrosion. |
| B. | used as a cathodic material. |
| C. | not used as pigment (in its compound forms) for paints. |
| D. | used as a shock absorber (in mattress form) between the foundation and steel framework of skyscrapper buildings. |
| Answer» E. | |
| 5972. |
Nitriding of steel is done (in electric furnace) at __________ C. |
| A. | 510 |
| B. | 1720 |
| C. | 2210 |
| D. | 910 |
| Answer» B. 1720 | |
| 5973. |
Addition of 2% nickel in steel makes it suitable for making |
| A. | electronic valves |
| B. | boiler plates, rivets etc. |
| C. | turbine blades |
| D. | connecting rod |
| Answer» C. turbine blades | |
| 5974. |
The softest material just next to talc in the Mhos scale is |
| A. | quartz |
| B. | gypsum |
| C. | feldspar |
| D. | fluorite |
| Answer» C. feldspar | |
| 5975. |
An elastic behaviour of materials is expressed in terms of |
| A. | hysterisis loop area |
| B. | stress-strain curve |
| C. | relaxation time |
| D. | none of these |
| Answer» D. none of these | |
| 5976. |
In drop forging process, the forging is done by dropping the __________ at high velocity. |
| A. | hammer |
| B. | workpiece. |
| C. | die with hammer |
| D. | weight on hammer |
| Answer» D. weight on hammer | |
| 5977. |
Which of the following is not an alloy of copper and tin ? |
| A. | Bell metal |
| B. | Gun metal |
| C. | Admiralty gun metal |
| D. | Monel metal |
| Answer» E. | |
| 5978. |
Which one contains the least percentage of carbon ? |
| A. | Wrought iron |
| B. | High speed steel |
| C. | Cast iron |
| D. | Pig iron |
| Answer» B. High speed steel | |
| 5979. |
Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of |
| A. | concrete |
| B. | steel |
| C. | zircalloy |
| D. | graphite |
| Answer» C. zircalloy | |
| 5980. |
All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain |
| A. | increases very quickly. |
| B. | decreases very quickly. |
| C. | increases in proportion to stress. |
| D. | decreases in proportion to stress. |
| Answer» B. decreases very quickly. | |
| 5981. |
Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si) |
| A. | do not require heat treatment for any of its applications. |
| B. | are used for leaf and coiled springs. |
| C. | do not have good resilience properties. |
| D. | is tempered at 850 C. |
| Answer» C. do not have good resilience properties. | |
| 5982. |
Which of the following is not a copper based alloy with nickel ? |
| A. | German silver |
| B. | Monel metal |
| C. | Inconel |
| D. | Constantan |
| Answer» D. Constantan | |
| 5983. |
The fermentor used for the production of ethyl alcohol from molasses is made of |
| A. | wood |
| B. | concrete |
| C. | copper bearing steel |
| D. | procelain |
| Answer» D. procelain | |
| 5984. |
Super conductors are those substances, which |
| A. | offer no resistance to current flow. |
| B. | conduct electricity at low temperature. |
| C. | offer high resistance to current flow. |
| D. | conduct electricity at high temperature. |
| Answer» B. conduct electricity at low temperature. | |
| 5985. |
The formation of oxide film on a metal due to atmospheric exposure reduces its |
| A. | toughness |
| B. | stiffness |
| C. | creep limit |
| D. | all (a), (b) & (c) |
| Answer» D. all (a), (b) & (c) | |
| 5986. |
Which of the following mechanical properties of a material is most structure insensitive ? |
| A. | Modulus of elasticity (young's modulus). |
| B. | Toughness. |
| C. | Percentage reduction of area. |
| D. | Tensile strength. |
| Answer» B. Toughness. | |
| 5987. |
Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100 C ? |
| A. | Monel |
| B. | Stainless steel |
| C. | Graphite |
| D. | Kel-F and teflon |
| Answer» C. Graphite | |
| 5988. |
Which of the following has the least carbon percentage ? |
| A. | Low carbon steel |
| B. | Mild steel |
| C. | Wrought iron |
| D. | White cast iron |
| Answer» D. White cast iron | |
| 5989. |
Lead |
| A. | is the hardest metal in common use. |
| B. | is the lightest metal in common use. |
| C. | can not be scratched by finger nails. |
| D. | can not be work hardened. |
| Answer» E. | |
| 5990. |
How many molecules per unit cell are there in a face centred cubic lettice ? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 5991. |
Which of the following comprises of hydrocarbons ? |
| A. | Mica flakes |
| B. | Glass |
| C. | Rubber |
| D. | None of these |
| Answer» D. None of these | |
| 5992. |
Nickel base alloys with __________ are known as monel metal. |
| A. | zinc |
| B. | tin |
| C. | copper |
| D. | molybdenum |
| Answer» D. molybdenum | |
| 5993. |
Wrought iron is having very high |
| A. | hardness. |
| B. | strength. |
| C. | corrosion resistance. |
| D. | susceptibility to changes in its properties by heat treatment. |
| Answer» D. susceptibility to changes in its properties by heat treatment. | |
| 5994. |
When iron is rusted, it is |
| A. | converted to a fine powder |
| B. | reduced |
| C. | oxidised |
| D. | none of these |
| Answer» D. none of these | |
| 5995. |
Containers made of high silicon cast iron (14% Si) are not suitable for the storage of |
| A. | acetic acid. |
| B. | benzoic & boric acids. |
| C. | phosphoric acid (95%) & sulphuric acid (95%). |
| D. | hydrochloric acid (concentrated). |
| Answer» E. | |
| 5996. |
Steel tower used for the storage of oleum |
| A. | is lined with lead. |
| B. | need not be lined. |
| C. | is lined with rubber. |
| D. | is lined with acid-proof bricks. |
| Answer» C. is lined with rubber. | |
| 5997. |
Plastics are |
| A. | used in very high temperature applications. |
| B. | non-biodegradable. |
| C. | not suitable for drainage pipe manufacture. |
| D. | all (a), (b) & (c). |
| Answer» C. not suitable for drainage pipe manufacture. | |
| 5998. |
Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of |
| A. | rubber lined mild steel |
| B. | lead lined mild steel |
| C. | aluminium |
| D. | cast iron |
| Answer» B. lead lined mild steel | |
| 5999. |
Locomotive boiler tubes are made of __________ alloys. |
| A. | arsenic copper |
| B. | magnesium |
| C. | aluminium |
| D. | nickel |
| Answer» B. magnesium | |
| 6000. |
Slow and progressive deformation of a material with time under constant stress is called |
| A. | creep |
| B. | erosion |
| C. | resilience |
| D. | none of these |
| Answer» B. erosion | |