Thursday, 9 November 2017

questions3

1. 2
a) 2 2 2 b) 2 2 2 2 2 2
c) 2 2 2 d) 2 2 2 2 2 2
2. Solve
a) ⁄ b) c) ⁄ d) ⁄
3. If , find the value of ?
a) ⁄ b) ⁄ c) ⁄ d) ⁄
4. 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
5. 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
6.
a) 2 b) 1 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. Which of the following is a conducting material?
a) Aluminum b) Porcelain c) Rubber d) Fiber
9. 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
10. = ……………
a) √ ⁄ b) √ ⁄ c) √ d) √
11. 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
12. Area of an equilateral triangle of side ‘a’ is …………….
a) √ b) √ ⁄ c) √ ⁄ d)
13. Multiply 2
a) 3 2 b) 3 2 c) 3 2 d) 3 2
14. What is the resistance of 1000W lamp working at 215V?
a) 0.021Ω b) 46.225Ω c) 4.651Ω d) 0.215Ω
15. Degree of hotness or coldness of a body is called as …………….
a) Heat b) Temperature c) Kelvin d) Radiation
16. Formula of Ohm’s law is ……………..
a) ⁄ b) ⁄ c) ⁄ d) ⁄
17. In which angle, the value of and are equal?
a) 30º b) 45º c) 60º d) 90º
18. Specific heat of water is ………….
a) 2.5 b) 2.0 c) 1.0 d) 0.1
19. 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
20. Radiation pyrometer is used to measure temperature up to ……………
a) 1000ºC b) 2000ºC c) 3000ºC d) 4000ºC
21. 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
22. If ( ⁄ , find the value of 2 ⁄ )
a) 18 b) 26 c) 32 d) 38
23. Convert 303ºK to ºC
a) 35ºC b) 30ºC c) 25ºC d) 20ºC
24. Which one of the following is an example of First Order Lever?
a) Lemon squeezer b) Cutting plier c) Fire tongs d) Nut cracker
25. Solve:
a) b) c) d)

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