18401. Out of the following, TLV of __________ is maximum (about 500 ppm).
18402. Which of the following plants does not emit appreciable amount of SO2 in atmosphere ?
18403. The maximum CO2 is emitted into the atmosphere by
18404. Which of the following is not a practical method of low level radioactive waste disposal ?
18405. Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.
18406. Removal of __________ results from the disinfection of water.
18407. Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?
18408. Carcinogenic air pollutants cause
18409. Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes
18410. Soluble silica present in boiler feed water can be removed by
18411. Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes
18412. Which of the following is a prime number?
18413. Radioactive solid nuclear wastes are disposed off by
18414. Growth of __________ is promoted by the presence of manganese in water.
18415. Average human body contains about __________ percent water by weight.
18416. Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels.
18417. If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.
18418. Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by
18419. Persons working in cement plants and limestone quarries are more prone to disease like
18420. Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called
18421. Operating principle of cyclone separator is based on the action of __________ dust particles.
18422. Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.
18423. Catalyst used in the manufacture of NH3 by Haber's process is finely divided
18438. ആധുനിക തിരുവിതാംകൂറിലെ രാഷ്ട്രീയ പ്രക്ഷോഭങ്ങളുടെ പിതാവ് എന്നറിയപ്പെടുന്നത്? [Aadhunika thiruvithaamkoorile raashdreeya prakshobhangalude pithaavu ennariyappedunnath?]
18439. ഇന്ത്യയുമായി അതിർത്തി പങ്കിടുന്നഏറ്റവും ചെറിയ രാജ്യം? [Inthyayumaayi athirtthi pankidunnaettavum cheriya raajyam?]
18440. സ്റ്റെന്റ് ചികിത്സ എന്തുമായി ബന്ധപ്പട്ടിരിക്കുന്നു? [Sttenru chikithsa enthumaayi bandhappattirikkunnu?]