practice set 3 for crpf radio operator, cipher and radio fitter exam 2025:
START TEST
#1. Farad is the unit of___________
#2. Which of the following remain constant while throwing a ball upward?
#3. The working principle of a washing machine is
#4. A jet engine works on the principle of conservation of_______
#5. Ball bearings are used in bicycles, cars etc because
#6. In Cricket Match , while catching a fast moving ball, a fielder in the ground gradually pulls his hand backwards with moving ball to reduce the velocity to zero. The act represents_____
#7. Match the column I and Column II Column I Column II A) Electric MotorP) Electric energy to Sound Energy B) Electric Bell Q) Electric energy to Mechanic Energy C) Electric BulbR)Light energy to Electrical Energy D) Photoelectric CellS)Heat energy to Light Energy E) Steam EngineT)Electric energy to light energy
#8. The tendency of a liquid drop to contract and occupy minimum area is due to
#9. When pressure is exerted on an enclosed liquid or gas at rest, it is transmitted equally in all the direction, it is in accordance
#10. The specific gravity of a substance is measured by a hydrometer at the sea level, if the measurement is done at the top of mountain, what would be the specific gravity?
#11. Which one of following is not electromagnetic in nature?
#12. From a power station, the power is transmitted at a very high voltage because
#13. Conductivity increases in the order of
#14. Transformer are used
#15. Consider the following statement regarding a motor car battery 1) The voltage is usually 12 V 2) Electrolyte used in hydrochloric acid 3) Electrodes are lead and copper 4) Capacity is expressed in amper- hour Which of the following statements are correct
#16. Which one among the following is correct order of power consumption for light of equal intensity?
#17. Two pieces of metallic wire having equal lengths and equal volume placed in air have different resistance. The two wire must
#18. Which of the following cannot be fabricated on an IC?
#19. The wave used in telecommunication are________
#20. Repeaters used in telephone links are_____
#21. Which one among the following radiations carries maximum energy?
#22. Fluorescent tubes are fitted with a choke. The choke coil_______
#23. Why are inner lining of hot water geysers made up of copper?
#24. Which zone of a candle flame is the hottest?
#25. Three bulbs of 40 W, 60W and 100W are connected in series to a current source of 200V.Which of the following statement is true?
#26. If the area of a circle is decreased by 36%. Then the radius of the circle is decreased by
#27. The floor of a rectangular room is 15m long and 12m wide. The room is surrounded by a Verandah of width 2m on all its sides. The area of the Verandah is
#28. The area of a triangle is 615m2. If one of its side is 123m, find the length of the perpendicular dropped on that side from opposite vertex.
#29. A car covers a distance of 540km in 9 hours. Speed of a train is double the speed of a car. Two third the speed of the train is equal to speed of bike. How much distance will the bike cover in 5 hour?
#30. A man starts from B to K and another from K to Bat the same time. After passing each other they complete their journeys in 3⅓ and 4⅘ hour respectively. Find the speed of the second man if the speed of the first is 12 kmph
#31. Three taps A, B, and C can fill a tank in 12, 15 and 20 Hours respectively. If A is open all the time and B and C open for One hours each alternately, then tank will be full in
#32. A is 30% more efficient than B. How much time will they working together take to complete a job which A alone could have done in 23 days.
#33. Computer A takes 3 minutes to process an input while Computer B takes 5 minutes. If Computer A, B and C can process an average of 14 inputs in one hour, how many minutes does computer C alone take to process one input?
#34. The ratio of the ages of A and B seven year ago was 3:4 respectively. The ratio of their ages nine year from now will be 7:8 respectively. What is B’s age at present?
#35. The largest and second largest angles of a triangle are in the ratio of 13:12. The smallest angle is 20% of the sum of the largest and second largest angles. What is the sum of the smallest and the second largest angles?
#36. The total of the ages of a class of 75 girls is 1050, the average age of 25 of them is 12 years and that of another 25 is 16 years. Find the average age of the remaining girls.
#37. The average of 5 consecutive even numbers A, B, C, D and E is 52. What is the product of B and E?
#38. Mohan bought a jute bag @ 30% discount on the list price. He then sold it at a price which was 160% of the list price thereby making a profit of Rs 81. What is the list price of the bag?
#39. A man sold two article at Rs 375 each. On one he gains 25% and on the other he losses 25%. The gain or loss on the whole transection is
#40. The profit percent of a bookseller if he sells book at marked price after enjoying a commission of 25% on marked price will be
#41. What will be the difference between the compound interest and simple interest at the rate of 5% p.a. on an amount of Rs 4000 at the end of two years?
#42. Rahul has borrowed Rs. 20000 from two money tenders. On one he had to pay 8% p.a. S.I.per year and on the other amount he had to pay 12% p.a. S.I. After 3 Years, he paid total interest of Rs 5760, Find the amount borrowed at 12% p.a.
#43. 71% of a number is more than its 46% by 120. What is 30 % of that number?
#45. What is the least number to be added to 3986 to make it a perfect square?
#46. One Terabyte (1TB) is equal to_________
#47. Number of bit used by the IPv6 address
#48. Which of the following is not a database management software?
#49. How many layers are in the TCP/IP Protocol ?
#50. Flip Flop circuit store _______ data
#51. System software is an interface between
#52. ASC II has how many codes?
#53. In context of computer, FAT stands for.
#54. Caches are usually built out of
#55. Which of the following does not work on the principle of magnetization?
#56. A DNS translate a domain name into_______
#58. In MS word, which would you choose to save a document with a new name?
#59. In MS Word, to convert a hyperlink e- mail address to regular text, right click the email address and then click ____ on the short cut menu.
#60. In MS Word, the contents of the clipboard remain the same until
#61. What is the shortcut key for “cut” the selected text in MS word?
#62. In MS Word, what is the shortcut keys for “subscript”
#63. Which key do you press to force a page break in MS Word?
#64. Which is not a font style in MS Word?
#65. Which enables us to send the same letter to different persons, in MS Word?
#66. In MS Excel the cell range of A2 to M12 is
#67. In MS Excel to create a formula, you can use
#68. What is the shortcut key to insert new sheet in current workbook?
#69. In MS Excel which of the following function will use to find the highest number in series of number?
#70. What are the tabs that appear at the bottom of each workbook called?
#71. In Microsoft Power point in order to see all the slides on one screen use
#72. Which of the following term is not related to the wifi security?
#73. What type of connector is used to plug a telephone line into a modem?
#74. A distributed network configuration in which all data/information pass through a central computer is
#75. Firewalls are designed to perform all the following except……….
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