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.
| 7601. |
A pipeline buried in soil is commonly protected from corrosion by |
| A. | anodic protection. |
| B. | cathodic protection. |
| C. | using inhibitors. |
| D. | using a special alloy resistant to corrosion. |
| Answer» C. using inhibitors. | |
| 7602. |
Circulation of liquid metal (i.e. molten sodium) in a liquid metal cooled nuclear reactor is done by a/an __________ pump. |
| A. | electromagnetic |
| B. | axial flow |
| C. | diaphragm |
| D. | reciprocating |
| Answer» B. axial flow | |
| 7603. |
Titanium is produced by __________ of Ti Cl4. |
| A. | electrolytic reduction |
| B. | calcium reduction |
| C. | magnesium reduction |
| D. | thermal dissociation |
| Answer» D. thermal dissociation | |
| 7604. |
__________ strain gauge is the most sensitive sensing element for strain measurement. |
| A. | photoelastic |
| B. | semiconductor |
| C. | wire resistance |
| D. | none of these |
| Answer» C. wire resistance | |
| 7605. |
A simple closed grinding circuit may consist of |
| A. | a ball mill and a classifier. |
| B. | a rod mill and a hydrocyclone. |
| C. | a jaw crusher and a hydrocyclone. |
| D. | a ball mill and a froth floatation cell. |
| Answer» B. a rod mill and a hydrocyclone. | |
| 7606. |
The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter. |
| A. | rapid sand |
| B. | pressure |
| C. | gravity |
| D. | slow sand. |
| Answer» C. gravity | |
| 7607. |
Refrigerative cooling employed during long distance transportation of food stuffs is normally done by |
| A. | ice |
| B. | liquid nitrogen |
| C. | liquid oxygen |
| D. | vacuum evaporation |
| Answer» C. liquid oxygen | |
| 7608. |
Internal cracks in drawn bars are due to |
| A. | secondary tensile stresses. |
| B. | temperature gradient in the work piece. |
| C. | heated dies and grips. |
| D. | internal compressive residual stress. |
| Answer» B. temperature gradient in the work piece. | |
| 7609. |
The radioactive isotope of hydrogen is |
| A. | deuterium |
| B. | tritium |
| C. | protium |
| D. | none of these |
| Answer» C. protium | |
| 7610. |
What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. K ? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m. K respectively. |
| A. | 2 |
| B. | 5 |
| C. | 10 |
| D. | 20 |
| Answer» B. 5 | |
| 7611. |
Which set of materials is used as a moderator in nuclear reactor ? |
| A. | Zircalloy & berrylium. |
| B. | Zircalloy & heavy water. |
| C. | Zirconium & berrylium. |
| D. | Heavy water & berrelium. |
| Answer» E. | |
| 7612. |
Malleabilisation heat treatment is performed on |
| A. | cast steel |
| B. | grey cast iron |
| C. | white cast iron |
| D. | spheroidal graphite cast iron |
| Answer» D. spheroidal graphite cast iron | |
| 7613. |
For hardening high alloy steel, it is to be heated slowly and uniformly to avoid |
| A. | local hardening |
| B. | scale formation |
| C. | segregation |
| D. | warpage |
| Answer» E. | |
| 7614. |
Addition of __________ to steel can not impart it high strength at elevated temperature. |
| A. | nickel |
| B. | magnesium |
| C. | silicon |
| D. | manganese |
| Answer» C. silicon | |
| 7615. |
Which of the following is a neutral flux used in the pyrometallurgy of metal extraction? |
| A. | Quartz |
| B. | Flourspar |
| C. | Dolomite |
| D. | Manganese ore |
| Answer» C. Dolomite | |
| 7616. |
1% concentration of water vapor in air is equivalent to __________ ppm (parts per million). |
| A. | 10000 |
| B. | 1000 |
| C. | 100 |
| D. | 10 |
| Answer» B. 1000 | |
| 7617. |
The ratio of coil diameter to wire diameter of a spring is called the spring |
| A. | index |
| B. | deflection |
| C. | form co-efficient |
| D. | none of these |
| Answer» B. deflection | |
| 7618. |
Grinding wheel made of silicon carbide is most suitable for grinding materials of low tensile strength (e.g; tough bronze). Grinding is a __________ operation. |
| A. | turning |
| B. | dressing |
| C. | forming |
| D. | surface finishing |
| Answer» E. | |
| 7619. |
Which of the following is the most effective inhibitor of grain growth, when added in small quantity in steel ? |
| A. | Manganese |
| B. | Vanadium |
| C. | Cobalt |
| D. | Copper |
| Answer» C. Cobalt | |
| 7620. |
A controller action in which there is a con-tinous relation between the values of controlled variable and the rate of change of conrolled output signal is called the __________ action. |
| A. | proportional |
| B. | integral |
| C. | derivative |
| D. | none of these |
| Answer» C. derivative | |
| 7621. |
When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the |
| A. | partial pressure of water vapour is less than the total pressure. |
| B. | humidity is < 100% & dew point temperature of air has not reached. |
| C. | dew point temperature of air has not reached & air is not saturated fully. |
| D. | air is fully saturated. |
| Answer» E. | |
| 7622. |
An engineer's hammer is made of high __________ steel. |
| A. | carbon |
| B. | speed |
| C. | silicon |
| D. | chromium |
| Answer» B. speed | |
| 7623. |
Impeller & casing of centrifugal pump handling corrosive liquid and frequently running under cavitation condition is most prone to __________ corrosion. |
| A. | uniform |
| B. | oxygen diffusion |
| C. | pitting |
| D. | inter-granular |
| Answer» D. inter-granular | |
| 7624. |
Isotropic materials have the same __________ in all the directions. |
| A. | thermal properties |
| B. | elastic properties |
| C. | stresses |
| D. | all (a), (b) & (c) |
| Answer» C. stresses | |
| 7625. |
The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air. |
| A. | ambient |
| B. | dry bulb |
| C. | dew point |
| D. | wet bulb |
| Answer» D. wet bulb | |
| 7626. |
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. | |
| 7627. |
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 | |
| 7628. |
In age-hardenable alloys, maximum ductility is obtained |
| A. | in as cast state. |
| B. | immediately after solution treatment and subsequent quenching. |
| C. | after optimum ageing. |
| D. | after overageing. |
| Answer» D. after overageing. | |
| 7629. |
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. | |
| 7630. |
Magnesium addition to cast iron increases its |
| A. | corrosion resistance. |
| B. | creep strength. |
| C. | ductility and strength in tension. |
| D. | hardness. |
| Answer» D. hardness. | |
| 7631. |
The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm2 . |
| A. | 273.15 |
| B. | 225.65 |
| C. | 100.03 |
| D. | 373.15 |
| Answer» C. 100.03 | |
| 7632. |
Value of a material is usually considered as a relationship between |
| A. | cost and profit. |
| B. | utility and appearance. |
| C. | utility and cost. |
| D. | reliability and utility. |
| Answer» D. reliability and utility. | |
| 7633. |
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'. | |
| 7634. |
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. | |
| 7635. |
Ignition of fuel in a diesel engine is by |
| A. | spark |
| B. | hot compressed air |
| C. | fuel injection |
| D. | none of these |
| Answer» C. fuel injection | |
| 7636. |
Which of the following is not an ore of zinc? |
| A. | Cerrusite |
| B. | Franklinite |
| C. | Calamine |
| D. | Troosite |
| Answer» B. Franklinite | |
| 7637. |
Phosphorous is added to copper melt to |
| A. | remove hydrogen. |
| B. | deoxidise the metal. |
| C. | improve fluidity. |
| D. | reduce shrinkage. |
| Answer» B. deoxidise the metal. | |
| 7638. |
Which of the following is not a suitable solid lubricant ? |
| A. | Talc |
| B. | Molybdenum disulphide |
| C. | Graphite |
| D. | None of these |
| Answer» E. | |
| 7639. |
The standard instrument used for calibrating the load applied by universal testing machine is called |
| A. | extensometer |
| B. | spring balace |
| C. | dynamometer |
| D. | none of these |
| Answer» E. | |
| 7640. |
The reductant used in the extraction of magnesium from calcined dolomite via Pidgeon's process is |
| A. | pure carbon |
| B. | pure silicon |
| C. | ferro silicon |
| D. | ferro manganese |
| Answer» D. ferro manganese | |
| 7641. |
The leg of a barometric leg pump is longer than the Toricellian leg, which is about __________ metres. |
| A. | 1 |
| B. | 5 |
| C. | 34 |
| D. | 10 |
| Answer» E. | |
| 7642. |
The moment of inertia of a body comes into play in __________ motion. |
| A. | curvilinear |
| B. | linear |
| C. | rotational |
| D. | none of these |
| Answer» D. none of these | |
| 7643. |
Thermoplastics are never moulded using |
| A. | injection moulding |
| B. | blow moulding |
| C. | extrusion |
| D. | compression moulding |
| Answer» E. | |
| 7644. |
Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then |
| A. | it will deliver low discharge of liquid. |
| B. | its efficiency will not be affected. |
| C. | it will not develop sufficient head to raise water. |
| D. | it will be cavitated. |
| Answer» C. it will not develop sufficient head to raise water. | |
| 7645. |
While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the |
| A. | low impact strength. |
| B. | high flexibility. |
| C. | better finish and surface appearance. |
| D. | high plastic deformation. |
| Answer» B. high flexibility. | |
| 7646. |
The stress at which a metal fails by fatigue lies |
| A. | near the fracture point of the stress-strain curve. |
| B. | in the plastic range. |
| C. | in the elastic range. |
| D. | none of these. |
| Answer» D. none of these. | |
| 7647. |
"Encyclopaedia of Chemical Technology" has been |
| A. | authored by Kirk Othmer. |
| B. | edited by Perry and Chilton. |
| C. | edited by Kirk Othmer. |
| D. | authored by Perry and Chilton. |
| Answer» D. authored by Perry and Chilton. | |
| 7648. |
Statistical quality control was developed by __________ , an American scientist during world war II. |
| A. | Water shewhart |
| B. | Fredric Taylor |
| C. | John Wright |
| D. | Woolmer |
| Answer» B. Fredric Taylor | |
| 7649. |
Surface tension of a liquid |
| A. | is due to intermolecular forces of cohesion. |
| B. | decreases with rise in temperature. |
| C. | is responsible for the spherical shape of an isolated liquid drop. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 7650. |
A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is |
| A. | -0.8 |
| B. | 0.8 |
| C. | +0.08 |
| D. | -0.24 |
| Answer» E. | |