Public Service Commission
Open Written Exam for the post of Kharidar of untechnical line of various service / group
Key B The candidates can not use the calculator..
Time:- 1 hr. Full Marks:- 100
Paper:- 2nd.
Subject:- (Science & Mathematics)
You must write the answer of every group in different answer sheet otherwise the answer sheet will cancel.
Objective Multianswer ( 50 × 2 = 100 Marks )
1. (Science) (25 ×2 = 50 Marks)
1. 
2 K clo3 MnO2 2 K cl + 3O2
2 K clo3 MnO2 2 K cl + 3O2 A
What type of reaction is it ?
A) combination reaction B) decomposition reaction
C) displacement reaction D) acid base reaction
2. Which gases are used to make chemical fertilizer urea ?
A) CO2 and O2 B) CO2 and NH3 C) CO2 and Cl2 D) CO2 and H2
3. Sodium pyrophosphate is an example of :
A) plastic B) soap C) detergent D) fertilizer
4. What will happen if there is difficiency of nitrogen in planet ?
A) leaves become yellow B) root does not grow
C) immunity power decrease D) all of above
5. Which one stage in the life cycle of mosquito is voracious ?
A) egg B) larva C) pupa D) adult
6. The process of decomposing soil nitrogen into atmospheric nitrogen is called :
A) nitrogen fixation B) ammonification C) nitrification D) denitrification
7. Which one life process of plant is shown by the along side figure ?
A) respiration B) photosynthesis C) transpiration D) phototaxis
8. What factor makes blood red ?
A) fibrinogen B) platelets C) W.B.C D) haemoglobin
9. Which part of the brain causes ‘coma’ ?
A) crebrum B) cerebellum C) medulla oblongate D) all of the above
10. The process of movement due to chemical is called …………
A) phototropism B) chemotropism C) hydrotropism D) Aerotropism
11. When black and white mouse are crossed then the phenotype ratio in the F2 – generation will be :
A) 1:3 B) 3:1 C) 1:2:1 D) 9:3:3:1
12. Which type of eclipse is seen when the distance of the earth and moon is very far ?
A) total solar eclipse B) annular solar eclipse C) partial solar eclipse D) semi-solar eclipse
13. What will be the effect if the earth’s axis is not inclined to its orbital plane making an angle of 66.5o ?
A) the day and night will be equal throughout the year
B) long night and day short
C) long day and short night
D) there will be no effect on time period of day and night
14. Connecting computers between two different countries is an example of :
A) WAN B)MAN C) UTP D) all of the above
15. Connection between a computer and the internet using a normal telephone is called ………..
A) satellite network B) dial-up network C) cable network D) none of the above
16. In which unit system length in meter, mass in kilogram and time in second is measured ?
A) metric system B) S.I. system C) F.P.S. system D) C.G.S. system
17. Rocket principle is based on :
A) Newton’s first law B) Newton’s second law C) Newton’s third law D) all of the above
18. If the mass of a body is doubled, what charges occurs kinetic energy ?
A) remains same B) becomes half C) gets doubled D) increases by four times
19. A breaker consists of full of water in it on heating or cooling, water spill out from breaker. What is the temperature of water ?
A) 0o C B) 2o C C) 4o C D) 5o C
20. What should be the minimum distance between source of sound and surface of the object for echo ?
A) 15m B) 20m C) 25m D)30 m
21. Which device is used to measure electric current ?
A) Galvanometer B) Ammeter C) Voltmeter D) Voltameter
22. A battery of 12 V emf is connected to head light of a bus and 4 A current flows, calculate resistance of bulb.
A) 3 Ώ B) 4 Ώ C) 5 Ώ D) 6 Ώ
23. The device based on the principle of electromagnetic induction is :
A) electric generator B) electric motor C) hydrometer D) barometer
24. Copper electrode is not used in the electrolysis of water because :
A) copper dissolves in electrolyte
B) copper does not conduct electricity
C) copper reacts with oxygen
D) all of above
25. How much (gm) potassium sulphate (H2So4) is formed, when 10 gm caustic potash (KOH) reacts with sulphuric acid ?
A) 147.5 gm B) 15.5 gm C) 56 gm D) 174 gm
2. (Mathematics) (25 × 2 = 50 Marks )
26. What will be the total sales in order to receive Rs. 1,200 at the rate of 2% as commission ?
A) Rs. 6,000 B) Rs. 60,000 C) Rs. 24,000 D) Rs. 2,000
27. If the interest on per rupee is 5 paisa per every 4 months, what is the rate percent per annum ?
A) 8% B) 10 % C) 12 % D) 15 %
28. If P, T, R, CA and CI represent principal, time, rate of interest, compound amount and compound interest respectively, which of the following is incorrect ?
T T
A) C.A. = P 1+ R B)C.I. = P 1 + R – P 100 100
T TC) C.I. = P 1+ R – 1 D) C.I. = P 1 + R 100 100 –1
29. How much is the difference between the compound interest and simple interest on Rs. 7,500 in 2 years at 10% rate ?
A) 75 B) 60 C) 70 D) 125
30. A watch of price Rs. 1,200 is depreciated at 10 % per annum. What will be the price of the watch after one year ?
31. The population of a city is 20,000 now and it grows at the rate of 2% per year. What will be the population of the city after 2 years ?
A) 20,800 B) 20,808 C) 19,200 D) 19,192
32. If $ 5 = £ 4 and Rs. 225 = $ 3, how many wil be exchanged for Rs. 5,625 ?
A) 40 B) 50 C) 60 D) 70
33. In a house, the electricity meter showed 950 units in the month of Chaitra and 1125 units in the month of Baishakha. What would be the cost of electricity bill at Rs. 8 per unit after getting 5 % discount ?
A) Rs. 1400 B) Rs. 1450 C) Rs. 1430 D) Rs. 1330
34. The minimum charge for the first 175 calls is Rs. 200 and the charge for each additional call is Rs. 1.50. How much will be the charge for 215 calls with 10% service charge and 10% VAT ?
A) Rs. 314.60 B) Rs. 272.60 C) Rs. 272 D) Rs. 312
35. What is the volume of sphere whose diameter is 21 cm ?
A) 4651 cm3 B) 4751 cm3 C) 4851 cm3 D) 4951 cm3
36. The sides of a triangle are in the ratio of 3:6:8. If perimeter is 340 cm, what is the length of the longest side ?
A) 130 B) 120 C) 160 D) 210
37. What is the total surface area of a cylinder with radius of a base 14 cm and height 6 cm ?
A) 528 sq. cm. B) 1760 sq. cm. C) 880 sq. cm. D) 1056 sq. cm.
38. What is the medium of the given data ?
A) 7 B) 9 C) 8 D) 5
39. In the year 2067 in Rasuwa district, if the production of miller was 7000 tons what will be the production of rice ? ( From the figure alongside )
A) 23000 ton B) 24000 ton C) 25000 ton D) 26000 ton
41. If the median wages for the following data is Rs. 19, what’s the value of P ?
| Wages | 10 | 15 | 20 | 25 | 30 |
| No. of worker | 10 | P | 15 | 10 | 5 |
42. If Rs. 12,000 is sufficient for 4 people, for 5 people how much required ?
A) Rs. 15,000 B) Rs. 14,000 C) Rs. 9,600 D) Rs. 1,600
43. If the cost of 8 pens is Rs. 96. How much money is needed to buy more 7 pens ?
A) Rs. 180 B) Rs. 84 C) Rs. 264 D) Rs. 174
44. Ram’s monthly income is Rs. 12,000. If he spends 85% of his income per month how much he saves in a year ?
A) Rs. 25,000 B) Rs. 21,600 C) Rs. 23,300 D) Rs. 20,200
45. What percent of 3 km is 600 m ?
A) 20% B)200% C) 40% D) 50%
46. What is the fraction of 200/15% ?
47. A bicycle whose marked price is Rs. 5000 is sold at Rs. 4500, what discount percent is given ?
48. If a shopkeeper buys a watch for Rs. 1600 and sells for Rs. 2000. What’s his total profit percent ?
A) 15% B) 20% C) 25% D) 30%
49. If Chhiring sold a mobile set at Rs. 7,590 with 10% profit, how much is its cost price ?
50. The yearly income of a person is Rs. 96,900. If 15% tax is levied on the yearly income of more than 80,000, how much tax should he pay ?
A) Rs. 2,000 B) 2,530 C) Rs. 2,535 D) Rs. 2,480
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