Download Previous Year Diploma Paper of Communication System-II CS-2 5th Semester ECE May 2017 Diploma Solved Paper
Communication System-2 5th Semester ECE May 2017 Diploma Paper
Q1. a) Fill in the Blanks. 15×1=15
Q1. Driving force of an ECO system is
a) Input of energy b) Energy and matter
c) Water d) Water and air
Q2. Which of the following problems is not created by noise pollution ?
a) Deafness b) Hypertension
c) Inflation d) Diarrhea
Q3. The portion of earth that support life is called:
a) Biosphere b) Biotic
c) Ecosystem d) None of the above
Q4. Biogas plants using cattle dung are called—-
a) Hydro plant b) Gobar gas plant
c) Thermal power plant d) Gas station Q5. Toxic waste consists of-
a) Old medicines b) Clothes
c) Plastics d) Glass bottles
Q6. Earth day is celebrated on –
a) 22 April b) 26 June
c) 18 Sep. d) 6 August
Q7. World environment day is celebrated every year on:
a) 5th March b) 15th April
c) 15th May d) 5th June
Q8. Silk is obtained from-
a) Earth worm b) Spider
c) Silk worm d) Cater piller
Q9. World population day is celebrated on:
a) 12 August b) 11 July
c) 23 September d) 5 June
Q 10. Energy generated from sun is called ——–
a) Sun energy b) Solar energy
c) Day light d) Sun light energy
Q11. The main cause of water pollution is –
a) Sewage disposal b) Industrial waste
c) Burning waste d) Both a and b
Q12. Pencillin is used as—-
a) Food b) Protein
c) Antibiotic d) Anti- allergic
Q13. Which of the following cannot be source of energy:
a)Air b) Tide wave
c) Water d) Rubber
Q14. Plant are producer they convert energy into:
a) Water b) Protein
c) Carbohydrate d) Food
Q2. Attempt any five questions. 5×6=30
Q15. Which of the following wastes cannot be decomposed by bacteria to form compost:
a) Kitchen wastes b) Plastic& polythene bag
c) Dead plants d) Bodies of insects living in the sea
Q16. Which state irrigates largest percentage of land:
a) Haryana b) Uttar Pradesh
c) Maharashtra d) Punjab
Q17. Forest and wildlife are
a) Renewable resources b) Non- renewable resources
c) Inexhaustible resources d) None of these
Q18. Volcano is Source of pollution
a) Artificial b) Natural
c) Both d) Man made
Q19. Animals that feed on other animals are called
a) Carnivorous b) Herbivorous
c) Omnivorous d) Both a and b
Q20. Which of the following is not a green house gas :
a) Oxygen b) Carbon dioxide
c) Methane d) Chloro fluoro carbon
Q21. Fluoride pollution mainly affects –
a) Kidney b) Brain
c) Heart d) Teeth
Q22. Animals which is/ are active at night —–
a) Rat b) Owl
c) Cockroach d) All of the above
Q23. The driving force of an ecosystem is……….
a) input of energy b) energy of matter
c) water d) water and air
Q24. Ozone layer thickness is measured in —
a) Millimeter b) Centimeter
c) Decibels d) Dobson units
Q25. Which of the following is an abiotic component of the ecosystem —–
a) Plants b) Humus
c) Fungi d) Bacteria
Q26. Which steps can help to control soil pollution
a) Reusing the materials b) Reducing chemical fertilizers
c) Reforesting d) All of above
Q27. Chief source of energy in environment is
a) Fire b) Star
c) Sun d) Moon
Q28. Smog is
a) Colorless b) Combination of smoke
c) A natural phenomenon d) All of the above
Q29. The area reserved for the welfare of wildlife is called
a) National Park b) Forest
c) Botanical Garden d) Sanctuary
Q30. Effects of mining are –
a) Deforestation b) Pollution
c) Blasting d) All of these
Q31. One of the best solution to get rid of non- biodegradable wastes is –
a) Burning b) Dumping
c) Recycling d) Burying
Q32. Concentration of which gas is highest in our environment?
a) Hydrogen b) Helium
c) Oxygen d) Nitrogen
Q33. pH value of pure water is :
a) 0 b) 7
c) 6 d) 5
Q34. The first Indian biosphere reserve was:
a) Sunderbans b) Nilgiri
c) Nanda devi d) Kaziranga
Q35. Defense equipments are source of:
a) Water pollution b) Air pollution
c) Noise pollution d) None of these
Q36. The pyramid of energy in any ecosystem is:
a) Always upright b) May be upright or inverted
c) Always inverted d) None of these
Q37. Environmental studies are very important for
a) Clean and fresh air b) Hygienic conditions
c) Getting clean drinking water d) All of the above
Q38. Acid rain is due to:
a) Formation of oxides of sulfur b) Formation of oxides of nitrogen
c) Formation of HNO d) All of these
Q39. Which of the following rivers lies in a rift valley?
a) Chambal b) Son
c) Tapti d) Lumi
Q40. We and our surroundings together are –
a) Environment b) Atmosphere
c) Lithosphere d) Hydrosphere
Q41. The part of earth which contains water is called:
a) Hydrosphere b) Atmosphere
c) Troposphere d) Ionosphere
Q42. Decomposer include
a) Bacteria b) Fungi
c) Animals d) Both a and b
Q43. The remains of dead animals and plants following their death are called:
a) Detritus b) Decomposers
c) Soil d) Fragments
Q44. Water covers over of the earth
a) 70% b) 30%
c) 50% d) None of these
Q45. Pollutants having most lasting effects are
a) Pesticides b) Smoke
c) CO d) Sulfur dioxide
Q46. Ozone depletion will cause:
a) Forest fires b) Global warming
c) Inverse incidence of skin cancer d) None of these
Q47. Deforestation generally decreases –
a) Rainfall b) Soil erosion
c) Draught d) Global warming
Q48. In our country the percentage of land under forest is about:
a) 20% b) 19%
c) 25% d) 30%
Q49. The Taj Mehal at Agra may be damaged by:
a) Sulfur dioxide b) Chlorine
c) Hydrogen d) Oxygen
Q50. An ecosystem consists of –
a) Green plants and animals b) Green plants and decomposers
c) Producers and consumers d) Green plants and animals, decomposers and abiotic environment
MODEM is combination of Modulator and Demodulator.
PBX stands for Private Branch Exchange.
Attenuation is expressed in Decibel (dB ).
Major disadvantage of FSK is its Required High Bandwidth.
The primary advantage of digital communication over analog communication is Noise Immunity.
ASCII is Seven (7) bit code.
EBCDIC stands for Extended Binary Coded Decimal Interchange Code.
UART stands for Universal Asynchronous Receiver Transmitter.
Bit rate = Number of Bits Transfer/Second.
CS-2 5th Semester ECE May 2017 Diploma Solved Paper Click Here
Advantages of digital communication system
Explain the block diagram of data communication system.
Important applications of modern FAX machine.
CRC in brief.
Different transmission modes
Features of private automatic branch exchange (PABX).
Modem its operation in brief.
CS-2 5th Semester ECE May 2018 Diploma Solved Paper Click Here
CS-2 5Th Semester ECE May 2017 Diploma Solved Paper
Facsimile communication its applications.
Block diagram explain digital exchange.
Principle of ASK? Explain its generation and detection.
Short note on CRC
Short Note on Echo suppressors.
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