Question: Pick up the correct statement from the following ?

• 1. The first man-made satellite, Sputnik-l’ was launched on 4th October, 1957
• 2. The United State’s Explorer 6 transmitted the first picture of the earth in August 1959
• 3. Television Infrared Observation Satellite (TIROS) designed for meteorological observations, started systematic earth observations from space from 1, April, 1960
• 4. All of these

Question: Which one of the following statements is correct ?

• 1. The function of an information system is to improve one s ability to make decisions
• 2. The information system is the chain of operations
• 3. A map is a collection of stored, analysed data, its stored information is suitability used in making decisions
• 4. All the above

Question: Pick up the correct statement from the following ?

• 1. Phase of a wave is expressed as a fraction of a period with respect to a reference
• 2. Phase is usually specified by angular measure with one period being 360°
• 3. The reference for finding the phase of a wave is taken from the previous passage through zero from the negative to the positive direction
• 4. All of these

Question: Which one of the following statements is correct ?

• 1. During the day, earth reflects solar radiation
• 2. During the day, earth reflects both solar radiations the emission from its surface
• 3. During the night, earth emits radiation from its surface
• 4. All of these

Question: Pick up the correct statement from the following?

• 1. Phytoplankton contains photosynthetically active pigment
• 2. An increase of phytoplankton increases the back scattering in the green region
• 3. An increase of phytoplankton absorbs the bule region rapidly
• 4. An increase of phytoplankton decreases the back scattering in the green region

Question: For the COD test of sewage, organic matter is oxidised by K2Cr2O7 in the presence of________________?

• 1. H2SO4
• 2. HNO3
• 3. HCl
• 4. None of these

Question: The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is_________________?

• 1. 1 in 100 upward
• 2. 1 in 500 upward
• 3. 1 in 100 downward
• 4. 1 in 503 upward

Question: Dilution method of disposing of sewage, is not preferred to_______________?

• 1. When sewage is fresh
• 2. When diluting water has high dissolved oxygen content
• 3. When diluting water is used for water supply near the point of sewage disposed
• 4. When the diluting water is having flow currents

Question: Imhoff cone is used to measure________________?

• 1. Total organic solids
• 2. Total solids
• 3. Total in organic solids
• 4. Settleable solids

Question: The grit and silt of the grit chambers, may not be used for_________________?

• 1. Raising low lying areas by dumping
• 2. Concreting
• 3. Both A and B
• 4. Neither A nor B