MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
In reverberatory furnace, charge is heated mainly by |
| A. | conduction. |
| B. | natural convection. |
| C. | radiation of heat from the roof of the combustion chamber. |
| D. | none of these. |
| Answer» D. none of these. | |
| 502. |
Which of the following is not an additive for flue gases from furnace to reduce its dew-point? |
| A. | Ammonia |
| B. | Fine dolomite |
| C. | Alkaline powders |
| D. | None of these |
| Answer» E. | |
| 503. |
Low stack loss indicates the |
| A. | use of sub-stoichiometric air for combustion. |
| B. | efficient use of fuel. |
| C. | inefficient use of fuel. |
| D. | oxygen enrichment of combustion air. |
| Answer» C. inefficient use of fuel. | |
| 504. |
Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent. |
| A. | 20 |
| B. | 40 |
| C. | 60 |
| D. | 80 |
| Answer» E. | |
| 505. |
Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called |
| A. | polyurethane |
| B. | silicone rubber |
| C. | teflon |
| D. | epoxy resin |
| Answer» D. epoxy resin | |
| 506. |
Fuel used in B.F. stove is |
| A. | pulverised coal |
| B. | furnace oil |
| C. | blast furnace gas/mixed gas |
| D. | coke oven gas |
| Answer» D. coke oven gas | |
| 507. |
Pulverised fuel fired furnaces employ __________ fuel firing. |
| A. | horizontal |
| B. | vertical |
| C. | tangential |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 508. |
Which of the following is not a directly fired furnace ? |
| A. | By-product coke oven |
| B. | Calcination kiln |
| C. | Sintering furnace |
| D. | Open hearth furnace |
| Answer» B. Calcination kiln | |
| 509. |
An example of a periodic furnace is the |
| A. | blast furnace stoves |
| B. | blast furnace |
| C. | coke oven heating chamber |
| D. | rotary kilns |
| Answer» B. blast furnace | |
| 510. |
Maximum heat transfer in high temperature furnaces is by |
| A. | conduction |
| B. | convection |
| C. | radiation |
| D. | either (a), (b) or (c); depends on the type of furnace |
| Answer» D. either (a), (b) or (c); depends on the type of furnace | |
| 511. |
Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by |
| A. | increasing the draft in the furnace. |
| B. | preheating the fuel gas. |
| C. | oxygen enrichment of combustion air. |
| D. | preheating the combustion air. |
| Answer» B. preheating the fuel gas. | |
| 512. |
Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by |
| A. | preheating the combustion air. |
| B. | oxygen enrichment of combustion air. |
| C. | preheating the fuel gas. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 513. |
Construction expenses are roughly __________ percent of the total direct cost of the plant. |
| A. | 2 |
| B. | 10 |
| C. | 30 |
| D. | 50 |
| Answer» C. 30 | |
| 514. |
Which of the following is not a component of depreciation cost ? |
| A. | Repairs and maintenance cost. |
| B. | Loss due to obsolescence of the equipment. |
| C. | Loss due to decrease in the demand of product. |
| D. | Loss due to accident/breakdown in the machinery. |
| Answer» B. Loss due to obsolescence of the equipment. | |
| 515. |
Annual depreciation cost are not constant when, the __________ method of depreciation calculation is used. |
| A. | straight line |
| B. | sinking fund |
| C. | present worth |
| D. | declining balance. |
| Answer» E. | |
| 516. |
A machine has an initial value of Rs. 5000, service life of 5 years and final salvage value of Rs. 1000. The annual depreciation cost by straight line method is Rs. |
| A. | 300 |
| B. | 600 |
| C. | 800 |
| D. | 1000 |
| Answer» D. 1000 | |
| 517. |
A series of equal payments (e.g., deposit or cost) made at equal intervals of time is known as |
| A. | perpetuity |
| B. | capital charge factor |
| C. | annuity |
| D. | future worth |
| Answer» D. future worth | |
| 518. |
Equipment installation cost in a chemical process plant ranges from __________ percent of the purchased equipment cost. |
| A. | 10 to 20 |
| B. | 35 to 45 |
| C. | 55 to 65 |
| D. | 70 to 80 |
| Answer» C. 55 to 65 | |
| 519. |
Annual depreciation costs are constant, when the __________ method of depreciation calculation is used. |
| A. | declining balance |
| B. | straight line |
| C. | sum of the years digit |
| D. | none of these |
| Answer» C. sum of the years digit | |
| 520. |
Cost incurred towards __________ in a chemical plant is a component of the utilities cost. |
| A. | water supply |
| B. | running a control laboratory |
| C. | property protection |
| D. | medical services |
| Answer» B. running a control laboratory | |
| 521. |
Tunnel kilns are usually used for |
| A. | roasting of pyrites. |
| B. | drying/tempering of refractories. |
| C. | reheating of slabs. |
| D. | melting of glass. |
| Answer» C. reheating of slabs. | |
| 522. |
The payback method for the measurement of return on investment |
| A. | gives a correct picture of profitability. |
| B. | underemphasises liquidity. |
| C. | does not measure the discounted rate of return. |
| D. | takes into account the cash inflows after the recovery of investments. |
| Answer» D. takes into account the cash inflows after the recovery of investments. | |
| 523. |
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent. |
| A. | 15 |
| B. | 40 |
| C. | 70 |
| D. | 85 |
| Answer» C. 70 | |
| 524. |
Which of the following is a natural draft furnace ? |
| A. | Blast furnace stoves |
| B. | Power plant boilers |
| C. | Sintering furnace |
| D. | None of these |
| Answer» B. Power plant boilers | |
| 525. |
The reason for excessive clinker formation in gas producers is the |
| A. | use of coal/coke containing a high % of fines and ash. |
| B. | use of fuel having too low an ash fusion temperature. |
| C. | development of hot spots in the fuel bed and an abnormally high rate of gasification. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 526. |
Conditioners like finely divided peat are added to the fertiliser to |
| A. | counteract burning. |
| B. | avoid caking & hardening. |
| C. | produce bulk. |
| D. | increase its solubility. |
| Answer» C. produce bulk. | |
| 527. |
To reduce the stack loss, heat recovery from flue gas can be done by |
| A. | preheating of cold stock. |
| B. | preheating of combustion air. |
| C. | steam generation in waste heat boilers. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 528. |
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic |
| A. | filaments |
| B. | pipes |
| C. | buckets |
| D. | tubings |
| Answer» D. tubings | |
| 529. |
Large tonnage of refractory bricks are dried in a |
| A. | shaft furnace |
| B. | rotary hearth furnace |
| C. | tunnel kiln |
| D. | muffle furnace |
| Answer» D. muffle furnace | |
| 530. |
Which is the most suitable fertiliser for paddy ? |
| A. | CAN |
| B. | Ammonium sulphate |
| C. | Ammonium nitrate |
| D. | Superphosphate |
| Answer» C. Ammonium nitrate | |
| 531. |
Reaction of dilute sulphuric acid with phosphate rock produces |
| A. | phosphoric acid |
| B. | superphosphate |
| C. | triple superphosphate |
| D. | gypsum |
| Answer» B. superphosphate | |
| 532. |
Urea is a __________ fertiliser. |
| A. | nitrogenous |
| B. | potassic |
| C. | phosphatic |
| D. | none of these |
| Answer» B. potassic | |
| 533. |
Calcium ammonium nitrate (CAN) is |
| A. | a mixed fertiliser |
| B. | a straight fertiliser |
| C. | a complex fertiliser |
| D. | not a fertiliser ; it is an explosive |
| Answer» D. not a fertiliser ; it is an explosive | |
| 534. |
Spalling resistance of a refractory can not be increased by |
| A. | increasing its porosity. |
| B. | using a coarser grog during its manufacture. |
| C. | decreasing its thermal co-efficient of expansion. |
| D. | making it denser. |
| Answer» E. | |
| 535. |
Fireclay refractories have |
| A. | low co-efficient of thermal expansion. |
| B. | poor thermal spalling resistance. |
| C. | tendency to expand unduly high during firing. |
| D. | very high cost. |
| Answer» B. poor thermal spalling resistance. | |
| 536. |
Maximum water percentage in refractory mix meant for hand moulding may be as high as __________ percent. |
| A. | 2-3 |
| B. | 5-7 |
| C. | 7-12 |
| D. | 14-20 |
| Answer» E. | |
| 537. |
Nitrogenous fertiliser is required |
| A. | during the early stage of growth to promote development of stem and leaves. |
| B. | for accelerating fruit formation in later stage of growth. |
| C. | to lessen the effect of excessive potash application. |
| D. | none of these. |
| Answer» B. for accelerating fruit formation in later stage of growth. | |
| 538. |
Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity). |
| A. | fireclay |
| B. | carborundum |
| C. | graphite |
| D. | chromite |
| Answer» D. chromite | |
| 539. |
Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage ? |
| A. | Tar bonded dolomite bricks |
| B. | Fireclay bricks |
| C. | Mullite bricks |
| D. | Magnesite bricks |
| Answer» B. Fireclay bricks | |
| 540. |
High density refractory bricks have lower |
| A. | spalling resistance. |
| B. | thermal conductivity. |
| C. | fusion point. |
| D. | slag penetration resistance. |
| Answer» B. thermal conductivity. | |
| 541. |
Which of the following may be used to measure the rate of nuclear disintegration? |
| A. | Geiger-Muller Counter |
| B. | Cyclotron |
| C. | Cold chamber |
| D. | Mass spectrograph |
| Answer» B. Cyclotron | |
| 542. |
Cement Kiln is a |
| A. | rotary Kiln |
| B. | tunnel Kiln |
| C. | natural draft furnace |
| D. | batch furnace |
| Answer» B. tunnel Kiln | |
| 543. |
In a furnace employing forced draught as compared to induced draught, |
| A. | air is sucked in, so air leaks are more and hence the furnace efficiency is reduced. |
| B. | the fan operates hot and hence blades are liable to corrosion and erosion. |
| C. | positive pressure exists in the furnace. |
| D. | none of these |
| Answer» D. none of these | |
| 544. |
Which is not a fissile nuclear material ? |
| A. | U-233 |
| B. | U-235 |
| C. | U-238 |
| D. | Pu-239 |
| Answer» D. Pu-239 | |
| 545. |
Uranium is recovered from its ore (pitchblende) by |
| A. | froth floatation technique. |
| B. | leaching with sulphuric acid. |
| C. | smelting in a furnace. |
| D. | dissolving in water. |
| Answer» C. smelting in a furnace. | |
| 546. |
Moderating material used in a thermal-reactor should be a |
| A. | good absorber of neutrons. |
| B. | solid substance. |
| C. | poor absorber of neutrons. |
| D. | none of these. |
| Answer» D. none of these. | |
| 547. |
'Light water' used as a coolant in nuclear reactor is nothing but |
| A. | ordinary water. |
| B. | mildly acidic (pH = 6) water. |
| C. | mildly alkaline (pH = 8) water. |
| D. | none of these. |
| Answer» B. mildly acidic (pH = 6) water. | |
| 548. |
The linear thermal expansion of __________ bricks upto 1000 C is very low of the order of 0.5 percent. |
| A. | fireclay |
| B. | silica |
| C. | magnesite |
| D. | corundum |
| Answer» B. silica | |
| 549. |
__________ method for profitability evaluation of a project does not account for investment cost due to land. |
| A. | Net present worth |
| B. | Pay out period |
| C. | Discounted cash flow |
| D. | Rate of return on investment |
| Answer» C. Discounted cash flow | |
| 550. |
Which of the following elements is not included in the scope of market analysis ? |
| A. | Competition from other manufactures. |
| B. | Product distribution. |
| C. | Opportunities |
| D. | Economics |
| Answer» E. | |