MCQOPTIONS
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MCQOPTIONS
This section includes 1037 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. |
Which of the following is not shipped in mild steel containers ? |
| A. | Acetone |
| B. | Ammonia |
| C. | Ethyl alcohol |
| D. | Formic acid |
| Answer» E. | |
| 852. |
Rotary kilns in cement industry are lined with____bricks. |
| A. | fireclay |
| B. | silica |
| C. | lead |
| D. | high alumina & high magnesia |
| Answer» E. | |
| 853. |
The softest material just next to talc in the Mhos scale is |
| A. | quartz |
| B. | gypsum |
| C. | feldspar |
| D. | fluorite |
| Answer» C. feldspar | |
| 854. |
The phenomenon in which slow extension of material takes place with the time at constant load is called |
| A. | plasticity |
| B. | creep |
| C. | elasticity |
| D. | ductility |
| Answer» C. elasticity | |
| 855. |
Carbon percentage in medium carbon steel is around |
| A. | 0.1 to 0.35 |
| B. | 0.35 to 0.5 |
| C. | 0.8 to 1.4 |
| D. | 1 to 1. 5 |
| Answer» C. 0.8 to 1.4 | |
| 856. |
A metallic alloy in which one of the constituent metal is __________ , is called an amalgam. |
| A. | zinc |
| B. | mercury |
| C. | lead |
| D. | tin |
| Answer» C. lead | |
| 857. |
Plasticisers are added to polymers to improve their |
| A. | tensile strength. |
| B. | softness & flexibility. |
| C. | acid resistance. |
| D. | alkali resistance. |
| Answer» C. acid resistance. | |
| 858. |
Nickel (76%) and chromium (15%) alloys are termed as |
| A. | inconel |
| B. | monel |
| C. | aluminium bronzes |
| D. | brass |
| Answer» B. monel | |
| 859. |
Gas holder of a gobar (cowdung) gas plant is made of |
| A. | molybdenum stainless steel |
| B. | tin |
| C. | mild steel |
| D. | aluminium |
| Answer» D. aluminium | |
| 860. |
Which of the following is the most widely used insulating material for steam carray-ing pipelines ? |
| A. | Ceramic fibre blanket |
| B. | Glass wool and 85% magnesia |
| C. | Vermiculite |
| D. | Slag wool |
| Answer» C. Vermiculite | |
| 861. |
Lead pipe is |
| A. | especially resistant to solutions containing H2SO4. |
| B. | usually joined by burning (e.g. by melting to adjacent pieces with a torch). |
| C. | having very low elastic limit resulting in permanent deformation from either mechanical or thermal strain. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 862. |
Brinell Hardness Number (BHN) for talc is approximately in the range of |
| A. | 43586 |
| B. | 20-30 |
| C. | 100 -150 |
| D. | 200 - 250 |
| Answer» C. 100 -150 | |
| 863. |
Graphite is a good |
| A. | thermal & electrical insulator. |
| B. | conductor of heat. |
| C. | conductor of electricity. |
| D. | both (b) & (c). |
| Answer» E. | |
| 864. |
Dead mild steel, which contains 0.10 to 0.15 percent carbon is used for making |
| A. | shafts |
| B. | flanges |
| C. | gears |
| D. | shear blades |
| Answer» C. gears | |
| 865. |
Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is |
| A. | used for making axle & shafts of aeroplanes, automobiles and locomotives. |
| B. | having poor fatigue resistance. |
| C. | having poor toughness. |
| D. | not helpful in producing cleaner steel due to oxidising action of vanadium. |
| Answer» B. having poor fatigue resistance. | |
| 866. |
Which one has the maximum tensile strength out of the following ? |
| A. | Nodular cast iron |
| B. | pig iron |
| C. | white cast iron |
| D. | grey cast iron |
| Answer» B. pig iron | |
| 867. |
Steel rods are used in reinforced concrete to increase its __________ strength. |
| A. | shear |
| B. | tensile |
| C. | compressive |
| D. | none of these |
| Answer» C. compressive | |
| 868. |
Thermoplastic resins are those polymers, which |
| A. | has decreased plasticity at increasing temperature. |
| B. | can not be moulded. |
| C. | easily deform under pressure at high temperature. |
| D. | none of these. |
| Answer» D. none of these. | |
| 869. |
Invar used in thermocouples is an alloy of nickel and |
| A. | iron |
| B. | copper |
| C. | chromium |
| D. | lead |
| Answer» B. copper | |
| 870. |
Heavy duty bearings are usually made of |
| A. | white metal |
| B. | phosphorous bronze |
| C. | monel |
| D. | zinc |
| Answer» B. phosphorous bronze | |
| 871. |
Hastelloy C is a good material of construction in chemical process industry, since it is |
| A. | highly corrosion resistant and is readily fabricated. |
| B. | relatively inexpensive although it can be fabricated with some difficulty. |
| C. | corrosion resistant to most alkalis, particularly because of its copper content. |
| D. | light and resists attack by acids. |
| Answer» E. | |
| 872. |
Constantan is an alloy of |
| A. | Cu (55%) & Sn (45%). |
| B. | Cu (55%) & Ni (45%). |
| C. | Pt (95%) & Rh (10%). |
| D. | Fe (80%) & Ni (20%). |
| Answer» C. Pt (95%) & Rh (10%). | |
| 873. |
Presence of nickel in steel improves its |
| A. | corrosion resistance. |
| B. | cutting ability. |
| C. | wear resistance. |
| D. | all (a), (b) and (c). |
| Answer» B. cutting ability. | |
| 874. |
Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C ?$ |
| A. | Silicone rubber, teflon, procelain and wood. |
| B. | Nickel, monel, stainless steel and graphite. |
| C. | Aluminium, copper, high silicon iron. |
| D. | Brass, cast iron, mild steel and tin. |
| Answer» E. | |
| 875. |
Brine solution is stored/treated in __________ lined vessels/pipes. |
| A. | rubber |
| B. | lead |
| C. | glass |
| D. | nickel |
| Answer» E. | |
| 876. |
__________ is used for determining the tensile strength of steels. |
| A. | Hydraulic press |
| B. | Universal testing machine |
| C. | Mechanical press |
| D. | none of these |
| Answer» C. Mechanical press | |
| 877. |
The range of Mho's scale of hardness is from |
| A. | l to l5 |
| B. | l to 8 |
| C. | l to10 |
| D. | 0 to 10 |
| Answer» D. 0 to 10 | |
| 878. |
Aqueous nitric acid is stored in |
| A. | steel drum |
| B. | stainless steel vessel |
| C. | cast iron vessel lined with acid-proof masonry brick |
| D. | cast iron vessel |
| Answer» C. cast iron vessel lined with acid-proof masonry brick | |
| 879. |
Bog iron used for the adsorption of H2S from coke oven gas is |
| A. | an intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide). |
| B. | iron impregnated with resin (usually bakelite). |
| C. | carbon free iron. |
| D. | none of these. |
| Answer» B. iron impregnated with resin (usually bakelite). | |
| 880. |
Muntz metal is a/an alloys of |
| A. | magnesium & tin |
| B. | ferrous material |
| C. | lead & tin |
| D. | copper & zinc |
| Answer» E. | |
| 881. |
Tempering of steel is done to make it |
| A. | brittle |
| B. | hard |
| C. | rollable |
| D. | soft |
| Answer» E. | |
| 882. |
Hastelloy comprises of |
| A. | copper and tin |
| B. | copper and nickel |
| C. | molybdenum and nickel |
| D. | lead and tin |
| Answer» D. lead and tin | |
| 883. |
Aluminium as a material of construction suffers from the disadvantage of |
| A. | very high cost. |
| B. | rather low tensile strength. |
| C. | very low strength to weight ratio. |
| D. | scarce availability. |
| Answer» C. very low strength to weight ratio. | |
| 884. |
The increase in hardness of metal due to its cold working is termed as the __________ hardening. |
| A. | work |
| B. | age |
| C. | induction |
| D. | flame |
| Answer» B. age | |
| 885. |
Hydrochloric acid is stored in a__vessel. |
| A. | lead lined steel |
| B. | rubber lined steel |
| C. | stainless steel |
| D. | cast iron |
| Answer» C. stainless steel | |
| 886. |
__________ is never shipped in glass carboys. |
| A. | Ammonia |
| B. | Acetic acid |
| C. | Phenol |
| D. | Formaldehyde |
| Answer» B. Acetic acid | |
| 887. |
Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by |
| A. | dilute HCI |
| B. | acetic acid |
| C. | concentrated H2SO4 |
| D. | none of these |
| Answer» C. concentrated H2SO4 | |
| 888. |
Tin coating on metals is not done by |
| A. | spraying |
| B. | powder metallurgy |
| C. | hot dipping |
| D. | electro-deposition |
| Answer» C. hot dipping | |
| 889. |
Cermets are __________ materials. |
| A. | refractory |
| B. | reinforced |
| C. | abrasive |
| D. | fully metallic |
| Answer» B. reinforced | |
| 890. |
Graphite is corroded by |
| A. | sulphuric acid (10%) |
| B. | sea water |
| C. | hydrochloric acid |
| D. | none of these |
| Answer» E. | |
| 891. |
For storing water and acid free benzol, use a __________ vessel. |
| A. | steel |
| B. | karbate |
| C. | stainless steel |
| D. | none of these |
| Answer» B. karbate | |
| 892. |
The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon. |
| A. | 0.2 |
| B. | 2 |
| C. | 4 |
| D. | 8 |
| Answer» D. 8 | |
| 893. |
Which of the following is not a nickel based alloy ? |
| A. | Inconel |
| B. | Hastelloys |
| C. | Nimonics |
| D. | Babbit metal |
| Answer» E. | |
| 894. |
Galvanised iron is |
| A. | harder |
| B. | protected from rusting |
| C. | alumina coated iron |
| D. | none of these |
| Answer» C. alumina coated iron | |
| 895. |
Refined acetic acid storage vessel are made of |
| A. | copper |
| B. | aluminium |
| C. | high carbon steel |
| D. | nickel |
| Answer» C. high carbon steel | |
| 896. |
Rotary driers are generally made of |
| A. | cast iron |
| B. | mild steel |
| C. | high silicon iron (14% Si) |
| D. | tin lined with refractory bricks |
| Answer» C. high silicon iron (14% Si) | |
| 897. |
How many atoms are there per unit cell in a body centred cubic lattice system ? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» B. 3 | |
| 898. |
Nickel (56%) and molybdenum (17%) alloys are called |
| A. | monel |
| B. | hastealloy C |
| C. | inconel |
| D. | bronzes |
| Answer» C. inconel | |
| 899. |
How many molecules per unit cell are there in a face centred cubic lettice ? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 900. |
The most resistant material to alkaline corrosion is |
| A. | duriron |
| B. | nickel |
| C. | aluminium |
| D. | karbate |
| Answer» C. aluminium | |