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.
| 2001. |
Number of electrons in the outermost orbit of a semi-conductor is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 2002. |
Strain hardening effect in metals subjected to cold working is due to the __________ mechanism. |
| A. | slip |
| B. | fracture |
| C. | winning |
| D. | dislocation |
| Answer» E. | |
| 2003. |
The bulk modulus of a material with Poisson's ratio of 0.5 is equal to |
| A. | 3 x Young's modulus |
| B. | Young's modulus |
| C. | infinity |
| D. | zero |
| Answer» D. zero | |
| 2004. |
The burnout heat flux in the nucleate boiling regime is not a function of the |
| A. | liquid density. |
| B. | vapour density. |
| C. | temperature difference. |
| D. | heat of evaporation. |
| Answer» C. temperature difference. | |
| 2005. |
Glass reacts with |
| A. | H2SO3 |
| B. | HF |
| C. | HNO3 |
| D. | K2Cr2O7 |
| Answer» C. HNO3 | |
| 2006. |
In a titration involving weak acid and strong base, the preferred indicator is |
| A. | Methyl orange |
| B. | Phenolphthalein |
| C. | Ethyl orange |
| D. | Fehling's solution |
| Answer» C. Ethyl orange | |
| 2007. |
Which of the following is an unconventional source of energy ? |
| A. | Thermal power |
| B. | Hydroelectric power |
| C. | Nuclear-fusion power |
| D. | Solar power |
| Answer» E. | |
| 2008. |
The phenomenon occurring during explosion of a hydrogen bomb is |
| A. | nuclear fission. |
| B. | nuclear fusion. |
| C. | a combination of both nuclear fission & fusion. |
| D. | none of these. |
| Answer» D. none of these. | |
| 2009. |
__________ is not a heat treatment process. |
| A. | Cyaniding |
| B. | Pakerising |
| C. | Austempering |
| D. | Martempering |
| Answer» C. Austempering | |
| 2010. |
A material subjected __________ must have high resilience. |
| A. | shockloading |
| B. | vibration |
| C. | fatigue |
| D. | tension |
| Answer» B. vibration | |
| 2011. |
Which of the following phenomenon will exhibit the minimum heat transfer? |
| A. | Boiling. |
| B. | Forced convection in air. |
| C. | Free convection in air. |
| D. | Conduction in air. |
| Answer» E. | |
| 2012. |
Ceramic tips for the cutting tool are prepared from __________ powder. |
| A. | carbon |
| B. | silicon carbide |
| C. | aluminium oxide |
| D. | tungsten |
| Answer» D. tungsten | |
| 2013. |
A material is capable of resisting softening at high temperature, because of its property termed as |
| A. | hot temper |
| B. | hot hardness |
| C. | fatigue |
| D. | creep |
| Answer» C. fatigue | |
| 2014. |
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 | |
| 2015. |
Which of the following materials has the least scrap value ? |
| A. | Aluminium |
| B. | Stainless steel |
| C. | Brass |
| D. | Copper |
| Answer» C. Brass | |
| 2016. |
__________ can replace tungsten in high speed steel. |
| A. | Chromium |
| B. | Vanadium |
| C. | Cobalt |
| D. | Molybdenum |
| Answer» D. Molybdenum | |
| 2017. |
For preparation of porous bearings by powder metallurgy, preferred particle shape is |
| A. | spherical |
| B. | nodular |
| C. | irregular |
| D. | no preferred shape |
| Answer» B. nodular | |
| 2018. |
A dummy activity is used in PERT network to describe the |
| A. | precedence relationship. |
| B. | resource idleness. |
| C. | resource restriction. |
| D. | necessary time delay. |
| Answer» B. resource idleness. | |
| 2019. |
__________ cycle is the most efficient thermodynamic cycle. |
| A. | Diesel |
| B. | Otto |
| C. | Rankine |
| D. | Carnot |
| Answer» E. | |
| 2020. |
The ultimate strength in tension for steel is __________ times the ultimate strength in shear. |
| A. | 0.5 |
| B. | 0.9 |
| C. | 1.5 |
| D. | 2.5 |
| Answer» D. 2.5 | |
| 2021. |
Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)2 __________ with increasing temperature. |
| A. | increases |
| B. | decreases |
| C. | shows inversion of solubility |
| D. | none of these |
| Answer» B. decreases | |
| 2022. |
Notched bar test is used for testing the __________ of a material. |
| A. | impact strength |
| B. | endurance limit |
| C. | machinability |
| D. | corrosion resistance |
| Answer» B. endurance limit | |
| 2023. |
A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is |
| A. | 0 |
| B. | 0.33 |
| C. | 0.44 |
| D. | 0.25 |
| Answer» D. 0.25 | |
| 2024. |
A static fluid can not have |
| A. | zero shear stress. |
| B. | positive normal stress. |
| C. | non-zero shear stress. |
| D. | none of these. |
| Answer» D. none of these. | |
| 2025. |
The main constituent of bones is |
| A. | CaF2 |
| B. | Ca3(PO4)2 |
| C. | CaCO3 |
| D. | CaCl2 |
| Answer» C. CaCO3 | |
| 2026. |
The most commonly used material for sewers for carrying sewage in the normal situation is |
| A. | asbestos cement |
| B. | stainiess steel |
| C. | stoneware |
| D. | cast iron |
| Answer» D. cast iron | |
| 2027. |
Good design of the casing of a centrifugal pump aims at minimising the |
| A. | cavitation |
| B. | frictional losses |
| C. | kinetic energy loss |
| D. | static head |
| Answer» D. static head | |
| 2028. |
Tin is not present as an alloying element in |
| A. | phosphor bronze |
| B. | gun metal |
| C. | fusible metal |
| D. | white metal |
| Answer» E. | |
| 2029. |
Which of the following materials has the poorest electrical conductivity ? |
| A. | Carbon |
| B. | Aluminium |
| C. | Silver |
| D. | Stainless steel |
| Answer» B. Aluminium | |
| 2030. |
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is |
| A. | cooled and dehumified. |
| B. | heated and humidified. |
| C. | cooled and humidified. |
| D. | heated and dehumidified. |
| Answer» D. heated and dehumidified. | |
| 2031. |
Plants produce carbohydrates from the CO2 present in the atmosphere by |
| A. | polymerisation. |
| B. | photochemical reaction. |
| C. | oxidation. |
| D. | none of these. |
| Answer» C. oxidation. | |
| 2032. |
Maximum carbon content in cast iron is __________ percent. |
| A. | 3.8 |
| B. | 4 |
| C. | 4.3 |
| D. | 4.6 |
| Answer» D. 4.6 | |
| 2033. |
The dew point of moist air becomes __________ with decrease in its relative humidity. |
| A. | less than the wet bulb temperature |
| B. | more than the wet bulb temperature |
| C. | more than the dry bulb temperature |
| D. | equal to wet bulb temperature |
| Answer» B. more than the wet bulb temperature | |
| 2034. |
Fog is an example of colloidal system of |
| A. | solid dispersed in gas. |
| B. | solid dispersed in liquid. |
| C. | liquid dispersed in gas. |
| D. | gas dispersed in liquid. |
| Answer» D. gas dispersed in liquid. | |
| 2035. |
Speisses is a mixture of the following: |
| A. | Arsenides of heavy metals. |
| B. | Antimonides of heavy metals. |
| C. | Arsenides & antimonides of heavy metals. |
| D. | Iron, cobalt and nickel. |
| Answer» B. Antimonides of heavy metals. | |
| 2036. |
Temperature profile along the length of a gas-gas counter flow heat exchanger is correctly represented by |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 2037. |
With increase in temperature, the surface tension of water |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | increases linearly |
| Answer» C. remains constant | |
| 2038. |
Silicon percentage in the silicon steel used for electrical appliances/equipments is |
| A. | 0.3-0.4 |
| B. | 41974 |
| C. | 43558 |
| D. | 20-25 |
| Answer» D. 20-25 | |
| 2039. |
Gas carrying pipelines are best joined by |
| A. | nuts & bolts |
| B. | rivetting |
| C. | welding |
| D. | none of these |
| Answer» D. none of these | |
| 2040. |
__________ welding will be the most suitable for butt welding two 20 cms thick boiler drum mild steel plates. |
| A. | Electrical resistance |
| B. | Electroslag |
| C. | Plasma torch |
| D. | Submerged arc |
| Answer» C. Plasma torch | |
| 2041. |
With increase in pressure, the saturation temperature of steam |
| A. | increases rapidly first and then slowly. |
| B. | increases slowly first and then rapidly. |
| C. | first increases and then decreases. |
| D. | none of these. |
| Answer» B. increases slowly first and then rapidly. | |
| 2042. |
__________ flux is used for the extraction of metal from its self fluxing ores. |
| A. | No |
| B. | Acid |
| C. | Basic |
| D. | Neutral |
| Answer» B. Acid | |
| 2043. |
In __________ process, ions of salts react with water to produce acidity or alkalinity. |
| A. | hydration |
| B. | hydrolysis |
| C. | electrolysis |
| D. | dialysis |
| Answer» C. electrolysis | |
| 2044. |
Boiler rating is normally done in terms of |
| A. | steam temperature & pressure. |
| B. | steam output (tons/hr). |
| C. | heat transfer rate (kcal/hr). |
| D. | heat transfer area (m2). |
| Answer» C. heat transfer rate (kcal/hr). | |
| 2045. |
Potable water means the water used for |
| A. | fire-fighting |
| B. | cooling |
| C. | drinking |
| D. | evaporation to produce steam |
| Answer» D. evaporation to produce steam | |
| 2046. |
Production of a hollow product by inflation of a tube or parison is called the __________ process. |
| A. | blow moulding |
| B. | calendering |
| C. | extrusion |
| D. | injection |
| Answer» B. calendering | |
| 2047. |
Unit molar solution of __________ is the best conductor of electricity. |
| A. | sodium chloride |
| B. | acetic acid |
| C. | sulphuric acid |
| D. | sucrose |
| Answer» D. sucrose | |
| 2048. |
Preheating prior to welding is done for the purpose of |
| A. | decreasing cooling rate. |
| B. | facilitating fusion of high melting metals. |
| C. | preventing hot cracking. |
| D. | ensuring full penetration. |
| Answer» B. facilitating fusion of high melting metals. | |
| 2049. |
Which of the following is preferred for rivetting ? |
| A. | Lap joint |
| B. | Butt joint |
| C. | Either (a) or (b) |
| D. | Neither (a) nor (b) |
| Answer» C. Either (a) or (b) | |
| 2050. |
A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is |
| A. | lead |
| B. | glass |
| C. | mica |
| D. | silver |
| Answer» B. glass | |