MCQOPTIONS
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MCQOPTIONS
This section includes 2253 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1651. |
Which of the following parameters is actually measured during tensile testing of a specimen using Universal testing machine? |
| A. | Load & elongation. |
| B. | Engineering stress & strain. |
| C. | True stress & strain. |
| D. | Poisson's ratio & Young's modulus. |
| Answer» B. Engineering stress & strain. | |
| 1652. |
A jig is used while __________ a hole. |
| A. | boring |
| B. | counter boring |
| C. | drilling |
| D. | enlarging |
| Answer» D. enlarging | |
| 1653. |
Lead percentage in pure galena is about |
| A. | 8.6 |
| B. | 86.6 |
| C. | 35.8 |
| D. | 61.4 |
| Answer» B. 86.6 | |
| 1654. |
Endurance is a measure of fatigue limit of a metal. Fatigue crack in nitrided machine parts originates |
| A. | at the surface. |
| B. | within the core. |
| C. | just below the surface. |
| D. | anywhere on the surface. |
| Answer» C. just below the surface. | |
| 1655. |
__________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten. |
| A. | Stellite |
| B. | High speed steel |
| C. | Cermet |
| D. | Alnico |
| Answer» B. High speed steel | |
| 1656. |
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. | |
| 1657. |
Overheating of satellites during re-entry to earth is controlled by |
| A. | thick insulation. |
| B. | ceramic lining. |
| C. | cooling by flow of air over the surface. |
| D. | none of these. |
| Answer» D. none of these. | |
| 1658. |
A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent. |
| A. | 150 |
| B. | 200 |
| C. | 300 |
| D. | 400 |
| Answer» C. 300 | |
| 1659. |
'Sterilised zone' around a hazardous chemical industry is an area with __________ km radius around it, in which the total population/inhabitants should be less than 20000 preferably in the upwind direction. |
| A. | 0.5 |
| B. | 5 |
| C. | 25 |
| D. | 50 |
| Answer» C. 25 | |
| 1660. |
Hard magnetic materials have high |
| A. | coercive force. |
| B. | residual magnetic induction. |
| C. | both 'a' & 'b'. |
| D. | neither 'a' nor 'b'. |
| Answer» D. neither 'a' nor 'b'. | |
| 1661. |
In a casting, cold shut defect is caused by |
| A. | low pounhg temperature. |
| B. | melt-mould reactions. |
| C. | faulty gating system. |
| D. | very low mould permeability. |
| Answer» B. melt-mould reactions. | |
| 1662. |
Light year is the unit of |
| A. | distance |
| B. | time |
| C. | intensity of light |
| D. | none of these |
| Answer» B. time | |
| 1663. |
During sensible cooling of air, its wet bulb temperature |
| A. | decreases but dew point remains constant. |
| B. | increases but dew point remains constant. |
| C. | increases & the dew point decreases. |
| D. | decreases & the dew point increases. |
| Answer» C. increases & the dew point decreases. | |
| 1664. |
Dialysis is the process of separating substances in the |
| A. | colloidal state from those present in the true solutions. |
| B. | colloidal state from those present in the suspensions. |
| C. | suspension from those present in the solutions. |
| D. | none of these. |
| Answer» B. colloidal state from those present in the suspensions. | |
| 1665. |
The approximate height of a blast furnace having a useful volume of 2000 m3 is about __________ metres |
| A. | 25 |
| B. | 35 |
| C. | 55 |
| D. | 75 |
| Answer» D. 75 | |
| 1666. |
The gases used in the treatment of asthma is a mixture of __________ and oxygen. |
| A. | helium |
| B. | argon |
| C. | neon |
| D. | none of these |
| Answer» B. argon | |
| 1667. |
Shampoos are commercially not available in the form of |
| A. | powder |
| B. | gaseous mixture |
| C. | solution |
| D. | emulsion |
| Answer» C. solution | |
| 1668. |
__________ forces do not act in case of fluids. |
| A. | Vibratory |
| B. | Centrifugal |
| C. | Elastic |
| D. | Tensile |
| Answer» E. | |
| 1669. |
Minimum diameter of the tube used for making water manometer should be __________ mm to avoid a correction for the effect of capillarity. |
| A. | 1 |
| B. | 2.5 |
| C. | 4 |
| D. | 6 |
| Answer» E. | |
| 1670. |
Boiler draught of 10 mm water column is equivalent to |
| A. | 1 kgf/m2 |
| B. | 10 kgf/m2 |
| C. | 10 kgf/mm2 |
| D. | 1 kgf/mm2 |
| Answer» C. 10 kgf/mm2 | |
| 1671. |
Quartz is a __________ material. |
| A. | diamagnetic |
| B. | ferromagnetic |
| C. | ferroelectric |
| D. | piezoelectric |
| Answer» E. | |
| 1672. |
The most suitable material for die casting is |
| A. | iron |
| B. | copper |
| C. | steel |
| D. | nickel |
| Answer» C. steel | |
| 1673. |
Which of the following materials does not form adherent oxide film on surface ? |
| A. | Copper |
| B. | Nickel |
| C. | Aluminium |
| D. | Gold & silver |
| Answer» E. | |
| 1674. |
A material having good damping property is likely to have |
| A. | greater defect density. |
| B. | fine grained structure. |
| C. | lesser defect density. |
| D. | high tensile strength. |
| Answer» B. fine grained structure. | |
| 1675. |
According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress. |
| A. | 0.5 |
| B. | 2 |
| C. | 2 |
| D. | 43499 |
| Answer» B. 2 | |
| 1676. |
On an average __________ fast neutrons are produced by nuclear fission of each atom of uranium-235. |
| A. | 1 |
| B. | 2.5 |
| C. | 3.5 |
| D. | 5 |
| Answer» C. 3.5 | |
| 1677. |
In case of fluid moving machineries, the relationship between saturation temperature and pressure decides the process of |
| A. | water hammer |
| B. | cavitation |
| C. | flow separation |
| D. | turbulent mixing |
| Answer» C. flow separation | |
| 1678. |
In Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient ). |
| A. | V2 |
| B. | 1/V2 |
| C. | 1/Vg |
| D. | Vg |
| Answer» E. | |
| 1679. |
The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel. |
| A. | carbon |
| B. | manganese |
| C. | both a & b |
| D. | neither 'a' nor 'b' |
| Answer» B. manganese | |
| 1680. |
Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be __________ mm. |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 40 |
| Answer» E. | |
| 1681. |
The material used for coating the welding electrode is termed as the |
| A. | flux |
| B. | slag |
| C. | protective layer |
| D. | binder |
| Answer» C. protective layer | |
| 1682. |
When an isolated thermodynamic system executes a process, |
| A. | work is done. |
| B. | heat transfer takes place. |
| C. | mass flow occurs across the boundary of the system. |
| D. | no chemical reaction takes place within the system. |
| Answer» E. | |
| 1683. |
Which of the following is a permanent fastening? |
| A. | Rivets |
| B. | Bolts |
| C. | Screws |
| D. | Keys |
| Answer» B. Bolts | |
| 1684. |
Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel. |
| A. | wrought |
| B. | tool |
| C. | alloy |
| D. | plain carbon |
| Answer» E. | |
| 1685. |
Alloy powder manufactured by the following process have spherical shapes. |
| A. | Electrochemical deposition. |
| B. | Gaseous reduction. |
| C. | Atomisation. |
| D. | Mechanical attrition. |
| Answer» D. Mechanical attrition. | |
| 1686. |
Particle nature of cathode rays is proved due to the fact that they |
| A. | travel in a straight line. |
| B. | get deflected by magnetic electric field. |
| C. | produce fluorescence. |
| D. | heat the exposed material. |
| Answer» C. produce fluorescence. | |
| 1687. |
The hardness of the lathe bed material is measured by the |
| A. | shore sceleroscope. |
| B. | Brinnel hardness tester. |
| C. | Vicker's hardness tester. |
| D. | Rockwell hardness tester. |
| Answer» B. Brinnel hardness tester. | |
| 1688. |
Material having negative co-efficient of linear expansion is |
| A. | copper |
| B. | aluminium |
| C. | rubber |
| D. | nickel |
| Answer» D. nickel | |
| 1689. |
Pick out the wrong statement about powder metallurgy technique. |
| A. | Powder metallurgy techniques are applied at room temperature. |
| B. | Final product in powder metallurgy is not necessarily metallic powder. |
| C. | The final product in powder metallurgy is made from metallic powder. |
| D. | Silver and nickel when melted together do not mix to form an alloy ; however alloy of these constituents can be made by powder metallurgy technique. |
| Answer» B. Final product in powder metallurgy is not necessarily metallic powder. | |
| 1690. |
Which of the following alloying elements reduces the formation of iron sulphide in steel ? |
| A. | Cobalt |
| B. | Nickel |
| C. | Manganese |
| D. | Vanadium |
| Answer» C. Manganese | |
| 1691. |
Absorptivity of a grey body varies with the |
| A. | wavelength of the incident ray. |
| B. | temperature |
| C. | both'a' & 'b' |
| D. | neither 'a' nor 'b' |
| Answer» E. | |
| 1692. |
The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down. |
| A. | isotactic |
| B. | saturation |
| C. | inversion |
| D. | throttling |
| Answer» D. throttling | |
| 1693. |
Prandtl mixing length in turbulent flow signifies the |
| A. | average distance perpendicular to the mean flow covered by the mixing particles. |
| B. | wavelength corresponding to the lowest frequency present in the flow field. |
| C. | ratio of mean free path to characteristic length of the flow field. |
| D. | magnitude of turbulent kinetic energy. |
| Answer» B. wavelength corresponding to the lowest frequency present in the flow field. | |
| 1694. |
The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling below 400°C is$ |
| A. | magnesite |
| B. | chrome |
| C. | silica |
| D. | fireclay |
| Answer» D. fireclay | |
| 1695. |
__________ can not be forged. |
| A. | High speed/carbon steel |
| B. | Cast iron |
| C. | Wrought iron |
| D. | Mild steel |
| Answer» C. Wrought iron | |
| 1696. |
If the head is doubled in & centrifugal pump, the power required will increase in the ratio of |
| A. | 23 |
| B. | 43519 |
| C. | 43521 |
| D. | 43545 |
| Answer» C. 43521 | |
| 1697. |
Which of the following is a unit of time ? |
| A. | Barn |
| B. | Light year |
| C. | Angstrom |
| D. | none of these |
| Answer» E. | |
| 1698. |
A gas having a negative Joule-Thompson co-efficient, when throttled, will |
| A. | become hotter. |
| B. | become cooler. |
| C. | remain unchanged. |
| D. | liquefy. |
| Answer» B. become cooler. | |
| 1699. |
Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that |
| A. | cooling produces tension on the surface. |
| B. | cooling produces compression on the surface. |
| C. | heating does not produces any thermal stress. |
| D. | heating produces compression on the surface. |
| Answer» B. cooling produces compression on the surface. | |
| 1700. |
The difference in the properties of a substance in three states of matter depends upon the |
| A. | binding energy of atoms. |
| B. | difference in molecular shape. |
| C. | difference in intermolecular forces. |
| D. | none of these. |
| Answer» D. none of these. | |