MCQOPTIONS
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MCQOPTIONS
This section includes 1175 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 851. |
_Addition of __________ to steel can not impart it high strength at elevated temperature.$? |
| A. | Nickel |
| B. | Magnesium |
| C. | Silicon |
| D. | Manganese |
| Answer» C. Silicon | |
| 852. |
_Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.$? |
| A. | Wrought |
| B. | Tool |
| C. | Alloy |
| D. | Plain carbon |
| Answer» E. | |
| 853. |
_In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following :$? |
| A. | Jet of water at high pressure |
| B. | Blast of air |
| C. | Mixture of water and air |
| D. | Rain of molten lead |
| Answer» E. | |
| 854. |
_Brinell Hardness Number (BHN) for talc is approximately in the range of$? |
| A. | 1-5 |
| B. | 20-30 |
| C. | 100-150 |
| D. | 200-250 |
| Answer» C. 100-150 | |
| 855. |
_The best criterion for analysing an economic investment is the$? |
| A. | Rate of return criterion |
| B. | Present value method |
| C. | Salvage value |
| D. | Future value method |
| Answer» B. Present value method | |
| 856. |
_Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience.$? |
| A. | Yield strength |
| B. | Elastic limit |
| C. | Proportional limit |
| D. | Maximum point |
| Answer» D. Maximum point | |
| 857. |
__________ forces do not act in case of fluids.$? |
| A. | Vibratory |
| B. | Centrifugal |
| C. | Elastic |
| D. | Tensile |
| Answer» E. | |
| 858. |
Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be$? |
| A. | More |
| B. | Less |
| C. | Same |
| D. | Either more or less; depends on the climatic conditions |
| Answer» C. Same | |
| 859. |
Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ?$? |
| A. | Small punches, broaches reamers and springs |
| B. | Cutlery, screws, rivets and files |
| C. | Mandrels, twist drills, small lathe tools and razors |
| D. | Forgings like can shaft, structural steel plate, threading dies and drawing dies |
| Answer» B. Cutlery, screws, rivets and files | |
| 860. |
The total frictional resistance to fluid flow does not depend upon the$? |
| A. | Roughness of the surface |
| B. | Fluid pressure |
| C. | Fluid density |
| D. | Fluid velocity |
| Answer» C. Fluid density | |
| 861. |
Surface tension is due to the __________ forces.$? |
| A. | Viscous |
| B. | Adhesive |
| C. | Cohesive |
| D. | Difference between adhesive & cohesive |
| Answer» E. | |
| 862. |
Coke is added in the blast furnace to$? |
| A. | Reduce & melt the iron ore |
| B. | Increase the fluidity of slag |
| C. | Remove sulphur & phosphorus from molten metal |
| D. | None of these |
| Answer» B. Increase the fluidity of slag | |
| 863. |
Fatigue resistance of a material is measured by the$? |
| A. | Elastic limit |
| B. | Ultimate tensile strength |
| C. | Young's modulus |
| D. | Endurance limit |
| Answer» E. | |
| 864. |
Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as$? |
| A. | Re0.5, Re0.8 |
| B. | Re0.8, Re-0.5 |
| C. | Re0.8, Re0.5 |
| D. | Re-0.8, Re0.5 |
| Answer» D. Re-0.8, Re0.5 | |
| 865. |
Two solutions A‚ÇÅ & A‚ÇÇ have pH value of 2 & 6 respectively. It implies that the solution$? |
| A. | A‚ÇÅ is more alkaline than solution A‚ÇÇ |
| B. | A‚ÇÅ is highly acidic |
| C. | A‚ÇÇ is very slightly acidic |
| D. | Both B & C |
| Answer» E. | |
| 866. |
The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.$? |
| A. | Equal to |
| B. | Greater than |
| C. | Less than |
| D. | Either A, B or C; depends on the size of atom |
| Answer» D. Either A, B or C; depends on the size of atom | |
| 867. |
A psychrometer does not measure the __________ temperature of moist air.$? |
| A. | Dew point |
| B. | Dry bulb |
| C. | Wet bulb |
| D. | None of these |
| Answer» B. Dry bulb | |
| 868. |
1% concentration of water vapor in air is equivalent to __________ ppm (parts per million).$? |
| A. | 10000 |
| B. | 1000 |
| C. | 100 |
| D. | 10 |
| Answer» B. 1000 | |
| 869. |
Metal shots used in shot blasting are made of$? |
| A. | Stellite |
| B. | Steel |
| C. | Bronze |
| D. | Lead |
| Answer» C. Bronze | |
| 870. |
Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.$? |
| A. | Bomb |
| B. | Throttling |
| C. | Junker's |
| D. | Boy's |
| Answer» C. Junker's | |
| 871. |
Holes in a plate for rivetted joints is preferably made by$? |
| A. | Drilling |
| B. | Tapping |
| C. | Reaming |
| D. | Punching |
| Answer» B. Tapping | |
| 872. |
The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the$? |
| A. | Work hardening |
| B. | Bauschinger effect |
| C. | Creeping effect |
| D. | Stress recovery effect |
| Answer» C. Creeping effect | |
| 873. |
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$? |
| A. | -0.8 |
| B. | 0.8 |
| C. | +0.08 |
| D. | -0.24 |
| Answer» E. | |
| 874. |
Catalyst used in the 'catalytic converter' employed in automobile exhaust line for complete combustion/oxidation of carbon monoxide, nitrogen oxides and hydrocarbons is$? |
| A. | Alumina |
| B. | Platinum |
| C. | Vanadium pentoxide |
| D. | Iron oxide |
| Answer» C. Vanadium pentoxide | |
| 875. |
Volumetric composition of flue gas analysed with the Orsat apparatus is : CO‚ÇÇ = 12%, O‚ÇÇ = 8%, CO = nil, N‚ÇÇ = 80%. This flue gas composition indicates that$? |
| A. | Pure oxygen has been used for combustion |
| B. | Nitrogen percentage in the fuel is very high |
| C. | Excess air has been used for combustion |
| D. | Hydrogen is not present in the fuel |
| Answer» D. Hydrogen is not present in the fuel | |
| 876. |
The atmospheric temperature during melting of ice/snow (in the atmosphere)$? |
| A. | Decreases |
| B. | Increases |
| C. | Remains same |
| D. | May increase or decrease ; depends on the altitude where snow melts |
| Answer» B. Increases | |
| 877. |
The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?$? |
| A. | Lead |
| B. | Copper |
| C. | Aluminium |
| D. | Wrought iron |
| Answer» B. Copper | |
| 878. |
Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs.$? |
| A. | Enthalpy |
| B. | Relative humidity |
| C. | Wet bulb temperature |
| D. | Dew point temperature |
| Answer» E. | |
| 879. |
'Ice point' is designated on Farenhite temperature scale by$? |
| A. | 0° |
| B. | 32° |
| C. | 62° |
| D. | 212° |
| Answer» C. 62¬¨‚àû | |
| 880. |
Floating control action$? |
| A. | Moves the final control element at constant speed in either direction in response to an error signal |
| B. | Changes the position of the final control element from on to off |
| C. | Is used to counteract rapid load changes |
| D. | None of these |
| Answer» B. Changes the position of the final control element from on to off | |
| 881. |
In case of simple harmonic motion, displacement is proportional to the$? |
| A. | Velocity |
| B. | Acceleration |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» C. Both A & B | |
| 882. |
A static fluid can not have$? |
| A. | Zero shear stress |
| B. | Positive normal stress |
| C. | Non-zero shear stress |
| D. | None of these |
| Answer» D. None of these | |
| 883. |
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.$? |
| A. | 2 |
| B. | 5 |
| C. | 10 |
| D. | 20 |
| Answer» B. 5 | |
| 884. |
Which of the following is not a charge material for cupola ?$? |
| A. | Limestone |
| B. | Iron scrap |
| C. | Iron ore |
| D. | Pig iron |
| Answer» D. Pig iron | |
| 885. |
Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.$? |
| A. | Wet bulb |
| B. | Dry bulb |
| C. | Saturation |
| D. | Dew point |
| Answer» B. Dry bulb | |
| 886. |
On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.$? |
| A. | Frequency |
| B. | Amplitude |
| C. | Damping |
| D. | None of these |
| Answer» B. Amplitude | |
| 887. |
A fluid is termed as the Newtonion fluid, when the shear stress is __________ the velocity gradient.$? |
| A. | Independent of |
| B. | Inversely proportional to |
| C. | Directly proportional to |
| D. | None of these |
| Answer» D. None of these | |
| 888. |
Adhesives$? |
| A. | Can't be used in the form of pressure sensitive tapes |
| B. | Can't join two dissimilar metals |
| C. | Cure instantaneously after application on a surface |
| D. | None of these |
| Answer» E. | |
| 889. |
Gas carrying pipelines are best joined by$? |
| A. | Nuts & bolts |
| B. | Rivetting |
| C. | Welding |
| D. | None of these |
| Answer» D. None of these | |
| 890. |
Minimum diameter of the tube used for making water manometer should be __________ mm to avoid a correction for the effect of capillarity.$? |
| A. | 1 |
| B. | 2.5 |
| C. | 4 |
| D. | 6 |
| Answer» E. | |
| 891. |
Function of gear box is to$? |
| A. | Reduce the speed |
| B. | Obtain variable speed |
| C. | Increase the speed |
| D. | Produce high torque |
| Answer» C. Increase the speed | |
| 892. |
The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?$? |
| A. | Cyaniding |
| B. | Sheardising |
| C. | Spherodising |
| D. | None of these |
| Answer» B. Sheardising | |
| 893. |
Matte smelting is used in the extraction of$? |
| A. | Lead |
| B. | Zinc |
| C. | Aluminium |
| D. | Copper |
| Answer» E. | |
| 894. |
Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxy-acetylene welding is __________ Nm³ .$? |
| A. | 0.5 |
| B. | 1 |
| C. | 2 |
| D. | 2.5 |
| Answer» E. | |
| 895. |
Which of the following fastening devices has a head at one end and a nut fitted to the other?$? |
| A. | Bolt |
| B. | Stud |
| C. | Top bolt |
| D. | None of these |
| Answer» C. Top bolt | |
| 896. |
Alloying elements present in Hayness stel-lite, which has superior performance than high speed steel, are$? |
| A. | Nickel, cobalt & chromium |
| B. | Tungsten, chromium & cobalt |
| C. | Manganese, chromium & cobalt |
| D. | Tungsten, molybdenum & nickel |
| Answer» C. Manganese, chromium & cobalt | |
| 897. |
__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.$? |
| A. | Vaneering |
| B. | Galvanising |
| C. | Electroplating |
| D. | Calorising |
| Answer» E. | |
| 898. |
Which of the following accounts for maximum loss of energy in a coal fired boiler?$? |
| A. | Incomplete combustion of fuel |
| B. | Outgoing flue gases |
| C. | Radiation heat losses |
| D. | Unburnt carbon in ash |
| Answer» C. Radiation heat losses | |
| 899. |
A dummy activity is used in PERT network to describe the$? |
| A. | Precedence relationship |
| B. | Resource idleness |
| C. | Resource restriction |
| D. | Necessary time delay |
| Answer» B. Resource idleness | |
| 900. |
Percentage of argon (by volume) in dry atmospheric air is about$? |
| A. | 0.09 |
| B. | 0.3 |
| C. | 0.57 |
| D. | 0.94 |
| Answer» E. | |