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.
| 7501. |
__________ test can be termed as the semi-distructive test. |
| A. | Impact |
| B. | Torsion |
| C. | Hardness |
| D. | Charpy |
| Answer» D. Charpy | |
| 7502. |
Uniform ramming of sand in green sand moulding process leads to |
| A. | reduced chance of gas porosity. |
| B. | greater dimensional stability of the casting. |
| C. | uniform flow of molten metal into the mould cavity. |
| D. | less sand expansion type of casting defect. |
| Answer» C. uniform flow of molten metal into the mould cavity. | |
| 7503. |
The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following element. |
| A. | Silicon |
| B. | Carbon |
| C. | Phosphorous |
| D. | Chromium |
| Answer» C. Phosphorous | |
| 7504. |
Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be |
| A. | 5 |
| B. | 1.25 |
| C. | 2.5 |
| D. | 3.75 |
| Answer» B. 1.25 | |
| 7505. |
Which of the following is an acidic constituent of B.F. slag ? |
| A. | SiO |
| B. | <sub>2</sub> |
| C. | FeO |
| D. | MgO |
| E. | CaO |
| Answer» B. <sub>2</sub> | |
| 7506. |
Dislocations are __________ defects. |
| A. | point |
| B. | line |
| C. | volume |
| D. | none of these |
| Answer» C. volume | |
| 7507. |
Which of the following is a commonly used manometric liquid for low pressure range? |
| A. | Ethyl alcohol |
| B. | Carbon tetrachloride |
| C. | Glycerol |
| D. | Ethylene glycol |
| Answer» C. Glycerol | |
| 7508. |
Upto the critical radius of insulation, added insulation, will |
| A. | increase the heat loss. |
| B. | decrease heat loss and will have no effect beyond that. |
| C. | decrease heat flux. |
| D. | reduce convection heat loss compared to conduction heat less. |
| Answer» C. decrease heat flux. | |
| 7509. |
Electrometallurgical methods of metal extraction is normally used for those metals |
| A. | whose oxide/ore is not reduced by carbon. |
| B. | which fall in the category of alkali & alkaline earth metals. |
| C. | which stands higher in the electrochemical series of the metal. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 7510. |
Lowering of recrystallisation temperature of metals can be achieved by its |
| A. | grain refinement. |
| B. | purification. |
| C. | working at lower temperature. |
| D. | all a, b & c. |
| Answer» E. | |
| 7511. |
An example of a buffer solution is |
| A. | mercury |
| B. | lime water |
| C. | human blood |
| D. | concentrated nitric acid |
| Answer» D. concentrated nitric acid | |
| 7512. |
A solid aluminium ball, when quenched in a water bath maintained at 40 C, cools down from 550 C to 450 C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ C. |
| A. | 370 |
| B. | 340 |
| C. | 320 |
| D. | 300 |
| Answer» B. 340 | |
| 7513. |
Name the safety device used to protect the boiler, when the water level falls below a minimum level. |
| A. | Blow down valve |
| B. | Blow off cock |
| C. | Fusible plug |
| D. | Safety valve |
| Answer» D. Safety valve | |
| 7514. |
__________ metal is used as a bearing liner material. |
| A. | Pewter |
| B. | White |
| C. | Babbit |
| D. | Gun |
| Answer» D. Gun | |
| 7515. |
For an ideal gas, Cp - Cv is |
| A. | R |
| B. | -R |
| C. | 0 |
| D. | (3/2) R |
| Answer» B. -R | |
| 7516. |
Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand. |
| A. | parting |
| B. | synthetic |
| C. | loam |
| D. | dry |
| Answer» B. synthetic | |
| 7517. |
Brazing filler metal used for joining steel plates |
| A. | melts below the melting points of base metals. |
| B. | melts below 300 C. |
| C. | is copper phosphorous alloy. |
| D. | is copper. |
| Answer» B. melts below 300 C. | |
| 7518. |
Fine grain size in metallic material will |
| A. | increase the yield strength. |
| B. | increase the creep strength. |
| C. | increase the fatigue strength. |
| D. | decrease the impact strength. |
| Answer» D. decrease the impact strength. | |
| 7519. |
Cold chiesel's hammers are made of |
| A. | high speed steel |
| B. | high carbon steel |
| C. | forged steel |
| D. | mild steel |
| Answer» C. forged steel | |
| 7520. |
Limestone is added in the blast furnace (during pig iron manufacture) to |
| A. | form slag by combining with impurities. |
| B. | supply heat by undergoing exothermic reaction with impurities. |
| C. | reduce the coke consumption. |
| D. | reduce slag viscosity. |
| Answer» B. supply heat by undergoing exothermic reaction with impurities. | |
| 7521. |
Cementite is in the lamellar form in the __________ phase of steel. |
| A. | martensitic |
| B. | bainitic |
| C. | pearlitic |
| D. | ferritic |
| Answer» D. ferritic | |
| 7522. |
Silicon in steel |
| A. | makes it usable in almost all magnetic circuits where alternating current is used. |
| B. | increases its electrical resistivity and decreases the hysteresis loss. |
| C. | is present upto 5% & 4% respectively when used in transformers & motor armatures. |
| D. | all 'a', 'b' & 'c'. |
| Answer» E. | |
| 7523. |
In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates, should be |
| A. | higher, as it gives higher wavelength. |
| B. | lower, as it gives higher wavelength. |
| C. | higher, as it gives shorter wavelength. |
| D. | lower, as it gives shorter wavelength. |
| Answer» D. lower, as it gives shorter wavelength. | |
| 7524. |
Atomic __________ is a whole number for an element. |
| A. | number |
| B. | weight |
| C. | radius |
| D. | none of these |
| Answer» B. weight | |
| 7525. |
Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ. |
| A. | +4000 |
| B. | -4000 |
| C. | 10000 |
| D. | - 10000 |
| Answer» B. -4000 | |
| 7526. |
Material of construction of the electrode used in the electric resistance welding is |
| A. | stainless steel |
| B. | graphite |
| C. | copper |
| D. | steel |
| Answer» D. steel | |
| 7527. |
In practice, the compression ratio of compression-ignition (CI) engine ranges from |
| A. | 15 to 25 |
| B. | 5 to 10 |
| C. | 40 to 55 |
| D. | 60 to 70 |
| Answer» B. 5 to 10 | |
| 7528. |
Temperature profile along the length of a gas-gas counter flow heat exchanger is correctly represented by |
| A. | <img src="/_files/images/chemical-engineering/chemical-engineering-basics/761-847-1.png"> |
| B. | <img src="/_files/images/chemical-engineering/chemical-engineering-basics/761-847-2.png"> |
| C. | <img src="/_files/images/chemical-engineering/chemical-engineering-basics/761-847-3.png"> |
| D. | <img src="/_files/images/chemical-engineering/chemical-engineering-basics/761-847-4.png"> |
| Answer» B. <img src="/_files/images/chemical-engineering/chemical-engineering-basics/761-847-2.png"> | |
| 7529. |
Metal shots used in shot blasting are made of |
| A. | stellite |
| B. | steel |
| C. | bronze |
| D. | lead |
| Answer» C. bronze | |
| 7530. |
At the point of boundary layer separation in fluid flow, the |
| A. | shear stress is maximum. |
| B. | velocity gradient is flat. |
| C. | density variation is maximum. |
| D. | shear stress is zero. |
| Answer» B. velocity gradient is flat. | |
| 7531. |
A spring material should have low |
| A. | elastic limit |
| B. | deflection value |
| C. | fatigue resistance |
| D. | none of these |
| Answer» E. | |
| 7532. |
Needles are produced by |
| A. | forging |
| B. | swaging |
| C. | extrusion |
| D. | machining |
| Answer» C. extrusion | |
| 7533. |
First empirical temperature scale conceived is the __________ temperature scale. |
| A. | Absolute |
| B. | Reaumer |
| C. | Farenhite |
| D. | Celcius |
| Answer» D. Celcius | |
| 7534. |
In continuous casting of liquid steel, the mould is made of |
| A. | water cooled steel |
| B. | water cooled copper. |
| C. | refractory oxide. |
| D. | silicon carbide. |
| Answer» C. refractory oxide. | |
| 7535. |
Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight |
| A. | 1.5 |
| B. | 3 |
| C. | 5 |
| D. | 7 |
| Answer» C. 5 | |
| 7536. |
Basic open hearth furnace (BOF) is not used for producing __________ steel. |
| A. | killed |
| B. | rimming |
| C. | high alloy |
| D. | none of these |
| Answer» D. none of these | |
| 7537. |
Principal alloying element in Elinvar (used for making hair springs for watches) is |
| A. | copper |
| B. | aluminium |
| C. | nickel |
| D. | zinc |
| Answer» D. zinc | |
| 7538. |
The value of y = cp/cv. at < 500 C for air & most common gases can be safely assumed to be |
| A. | 0.8 |
| B. | 1 |
| C. | 1.4 |
| D. | 1.8 |
| Answer» D. 1.8 | |
| 7539. |
Tesla metre per ampere (T. m/A) is the unit for the measurement of |
| A. | magnetic succeptibility. |
| B. | magnetic moment. |
| C. | permeability of free space. |
| D. | flux density. |
| Answer» D. flux density. | |
| 7540. |
Diamond does not conduct electricity, because |
| A. | its structure is very compact. |
| B. | no free electrons are present. |
| C. | it is of crystalline nature. |
| D. | there are only carbon atoms present. |
| Answer» C. it is of crystalline nature. | |
| 7541. |
__________ can not be forged. |
| A. | High speed/carbon steel |
| B. | Cast iron |
| C. | Wrought iron |
| D. | Mild steel |
| Answer» C. Wrought iron | |
| 7542. |
Material having maximum density is |
| A. | plutonium |
| B. | osmium |
| C. | titanium |
| D. | uranium |
| Answer» C. titanium | |
| 7543. |
Number of electrons in the outermost orbit of a semi-conductor is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 7544. |
Galena is an ore of |
| A. | iron |
| B. | copper |
| C. | lead |
| D. | aluminium |
| Answer» D. aluminium | |
| 7545. |
A reduction process is accompanied with increase in the |
| A. | number of electrons. |
| B. | oxidation number. |
| C. | both (a) & (b). |
| D. | neither (a) nor (b). |
| Answer» B. oxidation number. | |
| 7546. |
Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught. |
| A. | natural |
| B. | induced |
| C. | forced |
| D. | chimney |
| Answer» B. induced | |
| 7547. |
A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m. K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness __________ metre. |
| A. | 0.01 |
| B. | 0.1 |
| C. | 0.25 |
| D. | 0.5 |
| Answer» C. 0.25 | |
| 7548. |
Aromatics are desired constituents of |
| A. | lubricating oil |
| B. | diesel |
| C. | kerosene |
| D. | petrol |
| Answer» E. | |
| 7549. |
Galvanic corrosion |
| A. | occurs in a bimetal couple. |
| B. | occurs in highly stressed metallic parts only. |
| C. | is exemplified by caustic embrittlement of boiler tubes. |
| D. | is also called dezincification. |
| Answer» B. occurs in highly stressed metallic parts only. | |
| 7550. |
Increasing the temperature of a material makes it |
| A. | harder |
| B. | softer |
| C. | tougher |
| D. | stronger |
| Answer» C. tougher | |