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.
| 7701. |
Holes for rivetting purposes should be preferably made by |
| A. | cutting torch |
| B. | drilling |
| C. | punching |
| D. | none of these |
| Answer» C. punching | |
| 7702. |
One of the methods of purification of leach liquor is ion exchange, which involves |
| A. | exchange between two liquid phases. |
| B. | exchange between a gaseous phase and a liquid phase. |
| C. | exchange between a liquid phase and an organic resin phase. |
| D. | exchange between a solid phase and a gas phase. |
| Answer» D. exchange between a solid phase and a gas phase. | |
| 7703. |
A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place |
| A. | the better insulation material should be put just next to pipe (i.e., inside). |
| B. | the better insulating material should be put outside. |
| C. | either of the insulating material could be put on either side. |
| D. | steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe). |
| Answer» B. the better insulating material should be put outside. | |
| 7704. |
In the acid Bessemer process, the hot metal should have the following com-positon. |
| A. | S < 0.05% and P < 0.05%. |
| B. | S < 0.05% and P < 1.5%. |
| C. | S < 0.05% and P > 1.5%. |
| D. | S > 1.5% and P < 0.05%. |
| Answer» B. S < 0.05% and P < 1.5%. | |
| 7705. |
Which of the following does not come under the category of electrochemical corrosion ? |
| A. | Corrosion in organic liquids. |
| B. | Atmospheric corrosion in moist gas or air. |
| C. | Soil corrosion as in the case of underground pipes. |
| D. | Corrosion in sea water and molten metals. |
| Answer» B. Atmospheric corrosion in moist gas or air. | |
| 7706. |
Unbreakable crockeries are made from __________ polymers. |
| A. | polystyrene |
| B. | melamine |
| C. | polystyrene |
| D. | polyurathane |
| Answer» E. | |
| 7707. |
Cupola produces __________ iron.. |
| A. | pig |
| B. | cast |
| C. | wrought |
| D. | carbon free |
| Answer» C. wrought | |
| 7708. |
Euler number is defined as the ratio of inertia force to __________ force. |
| A. | pressure |
| B. | elastic |
| C. | gravity |
| D. | viscous |
| Answer» B. elastic | |
| 7709. |
Which of the following phenomenon/ phenomena is/are diffusion controlled ? |
| A. | Dislocation climb |
| B. | Cross-slip |
| C. | Twinning |
| D. | Recrystallisation |
| Answer» E. | |
| 7710. |
Joule-Thomson co-efficient is the ratio of |
| A. | pressure change to temperature change occuring during adiabatic compression of a gas. |
| B. | pressure change to temperature change occuring during adiabatic throttling of a gas. |
| C. | temperature change to pressure change occuring during adiabatic compression of a gas. |
| D. | temperature change to pressure change occuring during adiabatic throttling of a gas. |
| Answer» E. | |
| 7711. |
Expansion device used in a window air-conditioner is a/an |
| A. | automatic expansion valve. |
| B. | thermostatic expansion valve. |
| C. | float valve. |
| D. | capillary tube. |
| Answer» E. | |
| 7712. |
The unit of gc is |
| A. | <img src="/_files/images/chemical-engineering/chemical-engineering-basics/713-87-1.png"> |
| B. | <img src="/_files/images/chemical-engineering/chemical-engineering-basics/713-87-2.png"> |
| C. | <img src="/_files/images/chemical-engineering/chemical-engineering-basics/713-87-3.png"> |
| D. | <img src="/_files/images/chemical-engineering/chemical-engineering-basics/713-87-4.png"> |
| Answer» B. <img src="/_files/images/chemical-engineering/chemical-engineering-basics/713-87-2.png"> | |
| 7713. |
A colloidal system, in which a liquid is dispersed in gas is called a/an |
| A. | gel |
| B. | aerosol |
| C. | foam |
| D. | emulsion |
| Answer» C. foam | |
| 7714. |
Blast furnace is a |
| A. | counter current reactor |
| B. | co-current reactor |
| C. | cross-current reactor |
| D. | combination of all the three |
| Answer» B. co-current reactor | |
| 7715. |
Speed of a submarine in deep sea & that of an aeroplane is measured by a/an |
| A. | pitot tube |
| B. | hot wire anemometer |
| C. | rotameter |
| D. | stroboscope |
| Answer» B. hot wire anemometer | |
| 7716. |
The primary strengthening mechanism in 70 : 30 brass is the |
| A. | solid solution strengthening. |
| B. | precipitation hardening. |
| C. | dispersion strengthening. |
| D. | order hardening. |
| Answer» B. precipitation hardening. | |
| 7717. |
X-rays do not exhibit the property of |
| A. | reflection |
| B. | scattering |
| C. | diffraction |
| D. | dispersion |
| Answer» C. diffraction | |
| 7718. |
Which of the following is not an ore of iron ? |
| A. | Chalcopyrite |
| B. | Magnetite |
| C. | Hemetite |
| D. | Limonite |
| Answer» B. Magnetite | |
| 7719. |
Which is the most lethal weapon ? |
| A. | Atom (fusion) bomb |
| B. | Hydrogen bomb |
| C. | Cobalt bomb |
| D. | Neutron bomb |
| Answer» D. Neutron bomb | |
| 7720. |
Reynolds number of a fluid flowing in a circular pipe is 10000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30% ? |
| A. | 9100 |
| B. | 13000 |
| C. | 7000 |
| D. | 2550 |
| Answer» B. 13000 | |
| 7721. |
An example of unsteady non uniform flow is the flow of liquid under pressure through a |
| A. | tapering pipe at constant flow rate. |
| B. | tapering pipe at either decreasing or increasing flow rate. |
| C. | long pipeline of constant diameter. |
| D. | none of these. |
| Answer» C. long pipeline of constant diameter. | |
| 7722. |
Which of the following contributes maximum as main source of sulphur in the blast furnace charge ? |
| A. | Sinter |
| B. | Coke |
| C. | Iron ore |
| D. | Limestone |
| Answer» C. Iron ore | |
| 7723. |
Large diameter shafts are manufactured by |
| A. | hot rolling. |
| B. | cold drawing. |
| C. | casting and turning to size. |
| D. | forging and turning to size. |
| Answer» E. | |
| 7724. |
Common salt is produced from sea water in India generally by the __________ method. |
| A. | freeze drying |
| B. | solar evaporation |
| C. | electrolytic |
| D. | none of these |
| Answer» C. electrolytic | |
| 7725. |
Which of the following is termed as the boiler mounting ? |
| A. | Superheater |
| B. | Economiser |
| C. | Blow off cock |
| D. | Feed pump |
| Answer» D. Feed pump | |
| 7726. |
Which of the following is not a cupro-nick-el alloy ? |
| A. | German silver |
| B. | Monel metal |
| C. | Muntz metal |
| D. | None of these |
| Answer» D. None of these | |
| 7727. |
Electrochemical corrosion occurs |
| A. | where the liquid electrolytes containing free ions are present. |
| B. | only in alloys. |
| C. | only in pure metals. |
| D. | due to direct chemical action of metal with oxygen. |
| Answer» B. only in alloys. | |
| 7728. |
The ability of tool steel to resist softening at high temperatures is termed as __________ hardness. |
| A. | red |
| B. | extended |
| C. | super |
| D. | extreme |
| Answer» D. extreme | |
| 7729. |
Improvement in mechanical properties of metals in its hot working is due to the grains |
| A. | recrystallisation |
| B. | refinement |
| C. | growth |
| D. | recovery |
| Answer» C. growth | |
| 7730. |
Young's modulus of elasticity of a material is the slope of the initial linear portion of the stress-strain curve. It decreases ap-preciablyby |
| A. | alloying additions |
| B. | heat treatment |
| C. | cold work |
| D. | increasing temperature |
| Answer» C. cold work | |
| 7731. |
When a copper ball is heated, the largest percentage increase will be in its |
| A. | radius |
| B. | area |
| C. | mass |
| D. | volume |
| Answer» E. | |
| 7732. |
Which of the following hardness tests uses the depth of penetration caused by the indentor as the parameter for arriving at the hardness value of a material ? |
| A. | Shore sceleroscope test. |
| B. | Vicker's hardness test. |
| C. | Brinell hardness test. |
| D. | Rockwell hardness test. |
| Answer» E. | |
| 7733. |
The most commonly used moderator in nuclear power plant is |
| A. | graphite |
| B. | light water |
| C. | heavy water |
| D. | berellium |
| Answer» B. light water | |
| 7734. |
In an isochoric process, |
| A. | there is no transfer of mass and energy. |
| B. | free expansion of an ideal gas occurs. |
| C. | no mechanical work is done by the system. |
| D. | all 'a', 'b' & 'c'. |
| Answer» D. all 'a', 'b' & 'c'. | |
| 7735. |
Which of the following is a synthetic abrasive ? |
| A. | Corundum |
| B. | Emery |
| C. | Pumice |
| D. | Silicon carbide |
| Answer» E. | |
| 7736. |
Dezincification is a form of corrosion, which specifically applies to |
| A. | steel |
| B. | brass |
| C. | stainless steel |
| D. | babbit metal |
| Answer» C. stainless steel | |
| 7737. |
Water hammer in pipelines results, when the flowing fluid |
| A. | has very high velocity. |
| B. | has very high pressure. |
| C. | is brought to rest by gradually closing a valve. |
| D. | is suddenly brought to rest by closing a valve. |
| Answer» E. | |
| 7738. |
The preferred alloying element for low temperature applications of steel is |
| A. | Cr |
| B. | N |
| C. | Mo |
| D. | Ni |
| Answer» E. | |
| 7739. |
In a totally irreversible isothermal expansion process for an ideal gas, E = 0, H = 0. Then Q and S will be |
| A. | Q = 0, S=0 |
| B. | Q = 0 , S = +ve |
| C. | Q = 0, S = -ve |
| D. | Q = +ve , S= +ve |
| Answer» C. Q = 0, S = -ve | |
| 7740. |
Sulphur is melted in the sulphuric acid plant most commonly by employing |
| A. | electrical heater |
| B. | steam heater |
| C. | direct fuel oil fired heater |
| D. | gas fired furnace |
| Answer» C. direct fuel oil fired heater | |
| 7741. |
The instrument based on the following principle is used for the measurement of oxygen only in the flue gases. |
| A. | Chemical absorption. |
| B. | Thermal conductivity. |
| C. | Infrared absorption. |
| D. | Paramagnetism. |
| Answer» E. | |
| 7742. |
Which of the following has rotten eggy smell ? |
| A. | Hydrogen sulphide |
| B. | Styrene |
| C. | Phenol |
| D. | Dimethyl amine |
| Answer» B. Styrene | |
| 7743. |
Freezing of 35% oleum during its shipment in winter is avoided by the addition of small amount of |
| A. | hydrochloric acid |
| B. | methyl alcohol |
| C. | formic acid |
| D. | nitric acid |
| Answer» E. | |
| 7744. |
In hot working, dynamic recovery occurs in |
| A. | metals of low stacking fault energy. |
| B. | metals of high stacking fault energy e.g. -iron. |
| C. | single crystal of Ni-based superalloys. |
| D. | none of these. |
| Answer» C. single crystal of Ni-based superalloys. | |
| 7745. |
Which of the following manufacturing processes produces the strongest components ? |
| A. | Forging |
| B. | Cold rolling |
| C. | Hot rolling |
| D. | Die casting |
| Answer» B. Cold rolling | |
| 7746. |
Work study deals with the __________ study. |
| A. | time |
| B. | motion |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 7747. |
Maximum change in the hardness of mar tensite occurs in the carbon content range of __________ percent in steel. |
| A. | 0.01 to 0.10 |
| B. | 0.2 to 0.4 |
| C. | 0.5 to 0.7 |
| D. | 0.8 to 1.0 |
| Answer» C. 0.5 to 0.7 | |
| 7748. |
Knocking tendency in a petrol engine decreases with increasing |
| A. | supercharging |
| B. | compression ratio |
| C. | wall temperature |
| D. | engine speed |
| Answer» E. | |
| 7749. |
Hooke's law |
| A. | applies to elastic deformation. |
| B. | applies beyond limit of proportionality in stress-strain curve. |
| C. | states that stress is inversely proportional to strain upto elastic limit. |
| D. | noneofthese. |
| Answer» B. applies beyond limit of proportionality in stress-strain curve. | |
| 7750. |
Sewage is not an excellent medium for the growth of |
| A. | aquatic creatures. |
| B. | protozoa. |
| C. | virus. |
| D. | pathogenic bacteria. |
| Answer» B. protozoa. | |