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Recently added practice questions

6441. Present value of future cash flows is divided by an initial cost of project to calculate_______?
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A. Project index

B. Profitability index

C. Exchange index

D. Negative index

6442. Presence of ______________ in a dry gaseous fuel does not contribute to its calorific value?
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A. Hydrogen

B. Oxygen

C. Carbon

D. Sulphur

6443. Presence of SO2 in furnace gases attacks the ferrous metal by way of_________________?
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A. All A., B. and C.

B. Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at

C. Accelerating the rate of scaling

D. Causing metal embrittlement

E. h temperature

6444. Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxiate is ? _____________ percent?
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A. 80

B. 92

C. 88

D. 84
6445. Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes_______________?
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A. Foaming

B. Odour nuisances

C. Undesirable plant growth

D. Turbidity

6446. Presence of nickel & chromium in steel does not raise its _________________?
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A. Machining properties

B. Elastic limit

C. Ductility

D. Resilience

6447. Presence of moisture in fuel oil would____________________?
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A. clean the nozzles

B. reduce flame length

C. aid in proper combustion

D. cause sputtering, possibly extinguishing flame

E. keep the burner tips cool

6448. Presence of high concentration of ozone and smog in atmospheric air causes the __________________?
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A. Embrittlement & decrease of folding resistance of paper

B. Cracking of rubber products

C. Fading of dye on textiles

D. Damage of electrical insulator on high tension power line

6449. Presence of Epstein Barr virus in hairy leukoplakia can be demonstrated using following methods EXCEPT_____________?
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A. Electron microscopy

B. In situ hybridization

C. Tzanck smear

D. Polymerase chain reaction

6450. Presence of carbonaceous matter in the sewage____________________?
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A. Reduces sulphate ions to sulphides causing obnoxious smell

B. Increases the quantity of chlorine used for its purification

C. Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic

D. All A, B. and C.

E. atures

6451. Presence of a certain minimum quantity of fluorine is desirable in potable water to prevent___________________?
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A. Corrosion

B. Water-borne disease

C. Scale formation

D. Dental cavities
6452. Presence of 0.3 to 0.5% arsenic in copper increases its____________________?
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A. Ductility

B. Tenacity & hardness

C. Malleability

D. Electrical conductivity

6453. Prescribed germination percentage of foundation seed of groundnut____________________?
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A. 90

B. 20

C. 70

D. 95

6454. Prescribed germination percentage of foundation seed of ground nut is_________________?
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A. 70

B. 85

C. 90

D. 20

6455. Prepotency increase with increase in_______________?
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A. All the above

B. Homogeneity

C. Homozygosity

D. Hetrozygosity

6456. Preliminary project report for a road project must contain___________________?
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A. the several alternatives of the project that have been considered

B. the contract documents for inviting tenders

C. the soil survey, traffic survey, concept design and approximate cost

D. the detailed estimated cost based on detailed design

6457. Prejudice_______________?
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A. is a feeling a minority individual has toward his or her own minority?

B. is an attitude of aversion and hostility toward the members of a group simply because they belong it

C. refers to hostile behaviors exhibited by someone who has been offended by a member of a group

D. cannot not exist in someone who does not discriminate

6458. Preheating of a gaseous fuel results in increased____________________?
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A. Ignition temperature

B. Flame temperature

C. Flame length

D. Quantity of flue gas

6459. Preganglionic parasympathetic fibres travel to otic ganglion from_____________?
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A. None of the above

B. Glossopharyngeal nerve

C. Trigeminal nerve

D. Facial nerve

6460. Precursor of melanin is________________?
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A. Phenylalanine

B. Tyrosine

C. Methionine

D. Tryptophan

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