Thursday, 9 November 2017

qustions5

1. Calculate the area of a triangle whose sides are 20 cm, 16 cm and 10 cm.
a) 80.00 cm2 b) 79.24 cm2 c) 75.24 cm2 d) 70.24 cm2
2.
a) 2 b) 1 c) ⁄ d) √ ⁄
3. Which of the following is a conducting material?
a) Aluminum b) Porcelain c) Rubber d) Fiber
4. Efficiency of a lifting machine is 60%. The effort moves through 3m, when the load moves 12cm. What is its mechanical advantage?
a) 15 b) 14 c) 13 d) 12
5. 2
a) 2 2 2 b) 2 2 2 2 2 2
c) 2 2 2 d) 2 2 2 2 2 2
6. = ……………
a) √ ⁄ b) √ ⁄ c) √ d) √
7. Find the perimeter of a semi-circle whose radius is 14 cm. (Take π ⁄)
a) 22 cm b) 44 cm c) 66 cm d) 72 cm
8. Multiply 2
a) 3 2 b) 3 2 c) 3 2 d) 3 2
9. If , find the value of ?
a) ⁄ b) ⁄ c) ⁄ d) ⁄
10. If ( ⁄ , find the value of 2 ⁄ )
a) 18 b) 26 c) 32 d) 38
11. Area of an equilateral triangle of side ‘a’ is …………….
a) √ b) √ ⁄ c) √ ⁄ d)
12. What is the resistance of 1000W lamp working at 215V?
a) 0.021Ω b) 46.225Ω c) 4.651Ω d) 0.215Ω
13. Degree of hotness or coldness of a body is called as …………….
a) Heat b) Temperature c) Kelvin d) Radiation
14. Solve
a) ⁄ b) c) ⁄ d) ⁄
15. In which angle, the value of and are equal?
a) 30º b) 45º c) 60º d) 90º
16. Specific heat of water is ………….
a) 2.5 b) 2.0 c) 1.0 d) 0.1
17. Radiation pyrometer is used to measure temperature up to ……………
a) 1000ºC b) 2000ºC c) 3000ºC d) 4000ºC
18. Formula of Ohm’s law is ……………..
a) ⁄ b) ⁄ c) ⁄ d) ⁄
19. A rod AB is 8m long and has a weight of 10kg at A. Fulcrum is 3m from B. Calculate the load at B, if the load is in balance condition?
a) 6 kg b) 15.67 kg c) 16.67 kg d) 17.67 kg
20. Find the volume of a right cone of height 8cm and base diameter 5cm.
a) 52.37 cm3 b) 51.36 cm3 c) 50.30 cm3 d) 50.25 cm3
21. In a circuit four resistors connected in parallel are 6Ω, 5Ω, 3Ω and 2Ω respectively. Current flowing through the circuit is 25A. Calculate the total resistance?
a) 16Ω b) 1.2Ω c) 0.833Ω d) 1.833Ω
22. Solve:
a) b) c) d)
23. In a screw jack, the pitch is 0.25cm and the length of lever used is 15cm. If a weight of 6 ton is lifted by a force of 51kg right angle to lever, find the mechanical advantage and velocity ratio of the jack. (Take )
a) 116.65; 377.80 b) 117.65; 376.80 c) 115.65; 378.80 d) 114.65; 379.80
24. Convert 303ºK to ºC
a) 35ºC b) 30ºC c) 25ºC d) 20ºC
25. Which one of the following is an example of First Order Lever?
a) Lemon squeezer b) Cutting plier c) Fire tongs d) Nut cracker

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