All Free Chemical Engineering MCQs with Answers

• A. Six
• B. Three
• C. One
• D. Twelve

Explanation: Working capital commonly includes about one month's stock of raw materials valued at delivered cost.

• A. 0.1 to 1
• B. 1 to 2
• C. 50 to 60
• D. 10 to 20

Explanation: For most chemical plants, working capital is commonly estimated as roughly 10 to 20 percent of total capital investment.

• A. Annuity
• B. Capital charge factor
• C. Perpetuity
• D. Future worth

Explanation: Equal payments made at equal time intervals form an annuity. A perpetuity is a special annuity that continues indefinitely, while future…

• A. Inventories
• B. Chemical equipments
• C. Marketable securities
• D. None of these

Explanation: Inventories and marketable securities are current assets because they can normally be converted into cash within the operating cycle.

• A. 2V
• B. V/2
• C. V
• D. 3V

Explanation: A dike or bund is designed to retain the contents of the storage vessel if it leaks, so its required containment volume is taken as the…

• A. Is copper
• B. Melts below 300°C
• C. Is copper phosphorous alloy
• D. Melts below the melting points of base metals

Explanation: In brazing, the filler metal melts and flows at a temperature below the melting points of the steel base plates.

• A. Pewter
• B. Babbitt
• C. White
• D. Gun

Explanation: Babbitt is a soft, low-friction bearing alloy commonly used as a lining on stronger bearing shells.

• A. Multiple straight line
• B. Sinking fund
• C. Diminishing balance
• D. Sum of the years digit

Explanation: Under the diminishing-balance method, depreciation is calculated on the machine’s reducing book value, so the annual charge falls over…

• A. Butt
• B. None of these
• C. Welded
• D. Lap

Explanation: For traditional riveted boiler construction, circumferential seams are preferably made as lap joints because they carry the longitudinal…

• A. Starting sheet has planer anisotropy due to its texture
• B. Sheet material has been given substantial spring back
• C. Surface finish of the sheet is poor
• D. Starting sheet has normal anisotropy due to its texture

Explanation: Earing is uneven cup height during deep drawing, caused by planar anisotropy in the sheet’s crystallographic texture.

• A. Cyaniding
• B. Parkerizing
• C. Austempering
• D. Martempering

Explanation: Parkerizing is a phosphate-coating process used for corrosion resistance and paint adhesion, not a heat treatment.

• A. Cadmium
• B. Hafnium
• C. Cobalt
• D. Boron

Explanation: Control rods require strong neutron absorbers such as boron, cadmium or hafnium.

• A. Brake linings
• B. Bearings
• C. Carbide tool tips
• D. All A, B and C

Explanation: Powder metallurgy is suitable for porous self-lubricating bearings, composite brake linings and hard carbide cutting-tool tips.

• A. Bolt
• B. Stud
• C. Set screw
• D. Split nut

Explanation: A stud is a rod threaded at both ends, with one end screwed into a component and the other secured by a nut.

• A. Anodising
• B. Tempering
• C. Carburising
• D. Annealing

Explanation: Tempering follows hardening and reheats the steel to a controlled lower temperature, relieving internal stresses and improving toughness.

• A. Air
• B. Oxygen
• C. Liquid medium
• D. Gaseous medium

Explanation: Electrochemical corrosion requires an electrolyte so that ions can move between anodic and cathodic regions.

• A. S < 0.05% and P < 0.05%
• B. S < 0.05% and P < 1.5%
• C. S 1.5%
• D. S > 1.5% and P < 0.05%

Explanation: The acid Bessemer lining cannot effectively remove phosphorus, so the hot metal must contain very little phosphorus; sulfur must also be…

• A. Both A. & B.
• B. Motion
• C. Time
• D. Neither A. nor B.

Explanation: Work study combines method or motion study with time study. Motion study improves the way work is performed, while time study determines…

• A. Gold reserve
• B. Goods produced
• C. Earning of the citizens
• D. Taxes paid

Explanation: GNP measures the market value of final goods and services produced by a country's nationals, including their production abroad.

• A. Stainless steel
• B. Reinforced cement concrete
• C. Asbestos cement
• D. Cast iron

Explanation: Cast iron is strong, durable, non-combustible, and resistant to the conditions normally found in sanitary drainage systems.