Description : What do you call the increase of temperature with height? A. Temperature inversion B. Normal inversion C. Ducting D. Superrefraction
Last Answer : A. Temperature inversion
Description : What condition occur when the refractive index of the air decreases with height much more rapidly the normal? A. Refraction B. Superrefraction C. Subrefraction D. Diffraction
Last Answer : B. Superrefraction
Description : The decimetric wave is using what method of propagation? A. Ground wave B. Space wave C. Sky wave D. Tropospheric wave
Last Answer : B. Space wave
Description : Tropospheric scatter is a method of sky wave propagation for which of the following frequency bands? A. 300 kHz to 3 MHz B. 3 MHz to 30 MHz C. 30 MHz to 300 MHz D. 300 MHz to 3 GHz
Last Answer : D. 300 MHz to 3 GHz
Description : What propagation condition is usually indicated when a VHF signal is received from a station over 500 miles away? A. D-layer absorption B. Faraday rotation C. Tropospheric ducting D. Moonbounce
Last Answer : C. Tropospheric ducting
Description : What propagation condition is usually indicated when a VHF signal is received from a station over 5000 miles away? A. Moonbounce B. D-layer absorption C. Tropospheric ducting D. Faraday rotation
Description : Where is the tropospheric region that contributes most strongly to tropospheric scatter propagation?
Last Answer : Near the mid-point between the transmitting and receiving antennas, just above the radio horizon.
Description : (1) the action of ultraviolet rays on oxygen Explanation: The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx), carbon monoxide (CO ) and volatile organic compounds (VOCs), such as xylene, ... violet rays. NOx, CO, and VOCs are called ozone precursors. CO + 2O2 + CO2 + O3
Last Answer : Water is not effective in extinguishing a fire caused by petrol because - (1) the flame is too hot for water to cool it down (2) water and petrol react chemically (3) water and petrol are ... (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn
Description : The Himalayan region is poor in mineral resources because (a) it is made up of crystalline rocks (b) displacement of rock strata has disturbed the arrangement of rocks and made it ... minerals (d) the terrain makes exploitation of minerals difficult and very costly due to transport difficulties
Last Answer : Ans: (b)
Description : The Himalayan region is poor in mineral resources because: [IAS 2004] (a) it is made of crystalline rocks (b) the displacement of rock strata has disturbed the arrangement of rock and ... minerals (d) the terrain makes exploitation of minerals difficult and very costly due to transport difficulties
Description : Why is it that the Himalayan region is poor in mineral resources? (a) Displacement of rock strata has disturbed the arrangement of rocks and made it complex (b) It is made up of ... makes exploitation of minerals difficult (d) The climatic conditions are not suitable, for exploitation of minerals
Last Answer : Ans: (a)
Description : In tropical regions, (A) The surface gets heated more effectively than the arctic areas (B) After heating, the air becomes lighter and is displaced by cool air from the polar regions (C) The rising tropical air flows towards the polar region in the upper strata (D) All of the above
Last Answer : (D) All of the above
Description : An area on earth covered by a satellite radio beam is called ____. A. SSP B. Region C. footprint D. primary area
Last Answer : C. footprint
Description : Name the gaseous hydrocarbon that occurs naturally in sedimentary strata.
Last Answer : ANSWER: METHANE (CH4)
Description : Helical antennas are oftenused forsatellite trackingatVHFbecauseof a. troposcatter b. superrefraction c. ionospheric refraction d.theFaradayeffect
Last Answer : d.theFaradayeffect
Description : The product of the radiated RF power of a transmitter and the gain of the antenna system in a given direction relative to an isotropic radiator is called ____. A. Effective Radiated Power (ERP) B. Effective Isotropic Radiated Power (EIRP) C. Radiated Power D. Transmit Power
Last Answer : B. Effective Isotropic Radiated Power (EIRP)
Description : A middle aged woman gives a history of intermittent unilateral pain in the sub mandibular region, most probable cause is, A. Calculus in the salivary duct resulting in sialolithiasis. B. Ranula C. Cyst D. Mucocele
Last Answer : A. Calculus in the salivary duct resulting in sialolithiasis.
Description : Which radio frequency bands use the tropospheric scattering principle for propagation of radio waves?
Last Answer : Vhf and above
Description : Whenmicrowave signalsfollowthe curvatureofthe earth,thisisknownas a. the Faraday effect b.ducting c. tropospheric scatter d. ionospheric reflection
Last Answer : b.ducting
Description : Tropospheric scatteris usedwith frequenciesinthe followingrange: a. HF b. VHF c. UHF d. VLF
Last Answer : c. UHF
Description : Explain Tropospheric scatter propagation with sketch.
Last Answer : As the name implies, troposcatter uses the troposphere as the region that affects the radio signals being transmitted, returning them to Earth so that they can be received by the ... of "blurring" the overall received signal and this makes high speed data transmissions difficult.
Last Answer : Tropospheric scatter is used with frequencies in the UHF.
Last Answer : Tropospheric mode of propagation is used in VHF.
Description : A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the ... A) Diffusion within the pellet (B) Reaction (C) External mass transfer (D) None of the above
Last Answer : (A) Diffusion within the pellet
Description : Minerals are deposited and accumulated in the strata of which of the following rocks ? -SST 10th
Last Answer : A - Minerals are found in layers or strata in sedimentary rocks. Minerals are accumulated in horizontal strata after being exposed to high heat and pressure for a long period of time. Coal, iron ore, gypsum, potash salt etc are formed in this way.
Description : “Premchand’s novels are filled with all kinds of powerful characters drawn from all strata of society.” Support the statement by giving suitable examples. -SST 10th
Last Answer : Premchand has created very powerful characters in his novels and they cover the whole spectrum of society. In his novels, we meet with aristocrats and landlords, middle-level peasants and landless ... are very strong individuals, especially those who come from the lower classes of rural society.
Description : Open stratification is one in which individuals do not enjoy the freedom of changing their social strata.
Last Answer : Correct underlined words and complete the sentence : Open stratification is one in which ... the freedom of changing their social strata.
Description : Densest part of atmosphere strata is (A) Troposphere (B) Thermosphere (C) Stratosphere (D) Mesosphere
Last Answer : (A) Troposphere
Description : What is the origin of the word strategy? a. Strata b. Stategos c. Stratum
Last Answer : Stategos
Description : The strainer type tube well, is unsuitable for (A) Coarse gravels (B) Fine sandy strata (C) Clean gravels (D) None of these
Last Answer : (B) Fine sandy strata
Description : The ultimate Settlement of a soil is directly proportional to: (A) Depth of the compressible soil strata (B) Compressive index (C) Both (a) and (b) (D) None of these
Last Answer : (D) None of these
Description : Pick up the correct statement from the following: (A) A pile is a slender member which transfers the load through its lower end on a strong strata (B) A pile is a slender member which ... A pile is a cylindrical body of concrete which transfers the load at a depth greater than its width
Last Answer : Answer: Option B
Description : A soil strata may consist of (A) Soil zone (B) Intermediate zone (C) Capillary zone (D) All the above
Last Answer : Answer: Option D
Description : Pick up the correct statement from the following: (A) A confined bed of impervious material laid over an aquifer, is known as an aquiclude (B) The top most water bearing strata having no aquifer, is ... water from the top most water bearing strata, are called water table wells (D) All the above
Description : During percussion drilling (A) Ground water observations are hindered due to entry of the slurry in the soil below the bottom of the hole (B) Caving or mixing of strata are caused in soft soils or ... The soil to a considerable depth below the bottom of the hole gets disturbed (D) All the above
Description : The observed N- value from a standard penetration test conducted in saturated sandy strata is 30; the N- value corrected for dilatancy may be taken as : (b) 15 (a) 20 (c) 23 (d) 39
Last Answer : (c) 23
Description : A troughlike downfold of strata is called a:
Last Answer : ANSWER: SYNCLINE
Description : The real image formed by a spherical mirror is ____ relative to its object a. Erect b. Inverted c. Smaller d. Larger
Last Answer : d. Larger
Description : If a mirror is used to reflect light, the reflected light angle is ____ as the incident angle a. Smaller b. Larger c. The same d. Independent
Last Answer : c. The same
Description : The speech coding rate in D-AMPS is ____. A. 8 kbps B. 13 kbps C. 15 kbps D. 20 kbps
Last Answer : A. 8 kbps
Description : Encryption of data is important to ensure its privacy. It is most commonly achieved by using a ____. A. public-key encryption B. private-key encryption C. password-key encryption D. character set encryption
Last Answer : A. public-key encryption
Description : In GSM cellular system, the speech coding rate is ____. A. 13 kbps B. 8 kbps C. 15 kbps D. 20 kbps
Last Answer : A. 13 kbps
Description : Satellite orbits around the earth are ____ orbits. A. circular B. either elliptical or circular C. elliptical D. circular only
Last Answer : B. either elliptical or circular
Description : ____ system transmits frequency-division-multiplexed voice band signals over a coaxial cable for distances up to 4000 miles. A. T carrier B. X carrier C. L carrier D. F carrier
Last Answer : C. L carrier
Description : For a loudness level between 110 and 120 dB, the maximum daily exposure limit is ____ minute (s). A. 1 B. 60 C. 20 D. 45
Last Answer : A. 1
Description : ____ is defined as any radiation of energy by means of electromagnetic wave. A. Emission B. Radiation C. Radio D. Broadcasting
Last Answer : A. Emission
Description : The typical length of the rhombic antenna is ____. A. 2λ to 8λ B. 10λ to 20λ C. 1λ to 3λ D. 5λ to 10λ
Last Answer : A. 2λ to 8λ
Description : In cellular system, the average lead time to install a new base station is approximately ____ months to a year. A. 4 B. 5 C. 6 D. 10
Last Answer : C. 6
Description : The approximate single-hop nighttime range of F2 layer is ____. A. 3000 km B. 3840 km C. 4130 km D. 2350km
Last Answer : C. 4130 km