chemical engineering Mcqs
7001. Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of ______________ pressure?
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A. Absolute

B. Atmospheric

C. Gage

D. Small differential
7002. Which of the following is not an alloy of copper ?
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A. Pewter metal

B. Admiralty gun metal

C. German silver

D. Muntz metal

7003. Which of the following has a very high carbide forming tendency in steels ?
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A. Nickel

B. Chromium

C. Silicon

D. Vanadium
7004. Which is not a variable head meter _________________?
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A. Pitot tube

B. Venturimeter

C. None of these

D. Rotameter
7005. High specific speed of a pump implies that, it is a/an _____________ pump?
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A. Centrifugal

B. None of these

C. Mixed flow

D. Axial flow
7006. A metallic alloy in which one of the constituent metal is _____________, is called an amalgam?
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A. Lead

B. Tin

C. Mercury

D. Zinc

7007. Presence of cobalt in steel improves its____________________?
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A. Cutting ability

B. None of these

C. Tensile strength

D. Corrosion resistance

7008. In the low Reynolds number region, the drag force on a sphere is proportional to_______________?
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A. V0.5

B. V2

C. V

D. V4

7009. Location of vena-contracta in an orificemeter does not depend upon the________________?
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A. Ratio of pipe diameter to orifice diameter

B. Density, viscosity & compressibility of the fluid

C. Pipe roughness

D. Type of orifice
7010. Which of the following comprises of hydrocarbons ?
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A. Rubber

B. None of these

C. Mica flakes

D. Glass

7011. For laminar flow through a closed conduit____________________?
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A. Vmax = 0.5Vav

B. Vmax = 1.5Vav

C. Vmax = Vav

D. Vmax = 2Vav
7012. Gun metal is an alloy of_________________________?
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A. Manganese, phosphorus and nickel

B. Copper, phosphorus and nickel

C. Copper, tin and zinc

D. Nickel, tin and copper

7013. For water, when the pressure increases, the viscosity_________________?
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A. Remain constant

B. First decreases, and then increases

C. Decreases

D. Also increases

7014. Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will_______________?
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A. Increase

B. Increase or decrease depending on the pipe material

C. Decrease

D. Remain unchanged

7015. Nitriding of steel is a process for________________?
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A. Spheroidising

B. Annealing

C. Case hardening

D. Normalising

7016. Glass lined vessels are not used for handling__________________?
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A. Dilute HCI

B. Hydrofluoric acid

C. Dilute HNO3

D. Dilute H2SO4

7017. Most suitable material for high pressure vessel operating at 500 atm. and 500 C is__________________?
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A. 18/8 stainless steel

B. Mild steel

C. High silicon iron (14% Si)

D. Molybdenum stainless steel
7018. Coke oven walls are lined with _____________ bricks?
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A. Low thermal conductivity

B. Silica

C. Tar-dolomite

D. Fire clay

7019. Platinum and silver are corroded by___________________?
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A. None of these

B. Sulphuric acid (10%)

C. Phosphoric acid

D. Caustic soda solution

7020. _____________ is added in stainless steel to prevent inter crystal corrosion?
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A. Niobium

B. Chromium

C. Nickel

D. Vanadium

7021. In hot wire anemometer used for gas flow measurement, the wire is normally made of ______________________?
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A. Chromium

B. Constantan

C. Copper

D. Platinum
7022. Cold worked steel parts are normally subjected to_________________?
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A. Normalising

B. Annealing

C. Hardening

D. Shot peening

7023. Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as_____________________?
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A. Sherardizing

B. None of these

C. Anodising

D. Parkerising

7024. ____________ alloys have the highest specific strength of all the structural materials out of the following?
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A. Magnesium

B. Chromium

C. Magnetic steel

D. Titanium
7025. Polymerisation reactor used for the production of styrene butadiene rubber (SBR) is made of__________________?
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A. Cast iron

B. Stainless steel or glass lined vessel

C. Karbate

D. Wrought iron

7026. Percentage elongation of a material is a measure of its _______________________?
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A. Malleability

B. Ductility

C. Brittleness

D. Toughness

7027. Babbitt metal is not a___________________________?
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A. Pure metal

B. Lead base alloy

C. Tin base alloy

D. White metal

7028. Urea autoclave is made of_________________?
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A. Refractory blocks

B. Cast iron

C. Stainless steel

D. Lead lined steel

7029. The softest material in Mhos scale (for measuring hardness) is________________?
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A. Talc

B. None of these

C. Rubber

D. Gypsum

7030. Silicone rubber is not resistant to the corrosive action of____________________?
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A. Sulphuric acid (10%)

B. Sulphuric acid (95%)

C. Ether

D. Both B. and C.
7031. 18/8 steel is a/an __________ stainless steel ?
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A. Austenitic

B. Ferritic

C. None of these

D. Martensitic

7032. Specify the material of construction suitable for handling concentrated HNO3 at 100C ?
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A. Tin and wood

B. High silicon iron, Kel-F and Teflon

C. Silicone rubber

D. Stainless steel

7033. Hydrochloric acid is _______________ corrosive to common metals?
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A. Least

B. Mildly

C. Highly

D. Not

7034. Babbitt metals used for making bearings are _________________?
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A. Yellow metals

B. Short of antifrictional properties

C. Having homogenous microstructure

D. Tin or lead based alloys
7035. Which of the following is a light alloy ?
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A. Monel metal

B. Dow metal

C. Babbitt metal

D. German silver

7036. Tempering of steel is done to make it_________________?
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A. Brittle

B. Hard

C. Soft

D. Rollable

7037. Nickel and copper are the basic constituents of__________________?
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A. Monel metal

B. Hastelloy

C. Inconel

D. German silver

7038. Brine (15% concentration) can be stored in a vessel made of____________________?
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A. None of these

B. Karbate

C. Cast iron

D. Monel
7039. The main constituent of carborundum is ___________________ carbide?
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A. Silicon

B. Aluminium

C. Calcium

D. Boron

7040. The most resistant material to alkaline corrosion is____________________?
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A. Karbate

B. Nickel

C. Aluminium

D. Duriron

7041. Gunmetal and bronze are not corroded by the action of__________________?
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A. Synthetic detergent solution

B. Nitric acid (< 25%)

C. Wet chlorine

D. Hydrochloric acid (10%)

7042. A material is able to retain the deformation permanently by virtue of its___________________?
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A. Ductility

B. Plasticity

C. Elasticity

D. Malleability

7043. Water gas generator is made of__________________?
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A. High carbon steel-porcelain lined

B. Cast iron

C. Carbon steel-brick lined

D. Stainless steel-lead lined

7044. Which of the following stainless steels is non-magnetic ?
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A. Austenitic

B. None of these

C. Ferritic

D. Martenistic

7045. Creep is not exhibited at low temperature by _____________________?
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A. Rubber

B. Plastics

C. Acrylics

D. Lead
7046. Hot working of lead is carried out at_________________?
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A. 150 C

B. 373 K

C. Room temperature

D. 75 C

7047. 18-4-1 high speed steel contains 18%, 4% and 1% respectively of____________________?
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A. Tungsten, vanadium and chromium

B. Vanadium, chromium and tungsten

C. Tungsten, chromium and vanadium

D. Chromium, tungsten and vanadium

7048. The material of construction of pressure mills used for squeezing out the juice from sugar cane is__________________?
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A. Monel

B. Stainless steel

C. Mild steel

D. Cast iron
7049. Which of the following exercises most powerful influence on the mechanical properties of steel ?
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A. Carbon

B. Silicon

C. Phosphorous

D. Manganese

7050. In order to be called steel, an alloy should have iron percentage greater than____________________?
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A. 80

B. 50

C. 90

D. 70