Workshop Calculation and Science 2nd year

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1. What is the expanded form of S.P?

a. Selected Price

b. Special Price

c. Selling Price

d. Super Price

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2. Which is a kind of surface hardening process?

a. Cementide

b. Ferrite

c. Nitriding

d. Tempering

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3. Which is thermosetting plastic?

a. Vinyl polymers

b. Polystyrenes

c. Celluloid

d. Melamine resins

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4. Which force acts on crank shaft?

a. Shear stress

b. Torsional stress

c. Tensile stress

d. Compressive stress

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5. Which one is the ratio of stress?

a. Load and area

b. Load and direction

c. Load and diameter

d. Load and time

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6. What is the unit of strain?

a. Kg/cm²

b. Newton/metre²

c. Metre

d. No unit

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7. Which is elastic material?

a. Nylon

b. Polystyrenes

c. Celluloid

d. Polycarbonates

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8. What are the three consecutive numbers if there sum is 42?

a. 11,12,13

b. 12,13,14

c. 13,14,15

d. 14,15,16

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9. What is the value of x if (x + 2) / 2 = 19?

a. 38

b. 33

c. 35

d. 36

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10. What is the value of x, if 3 (2x - 4) = -4x + 28 ?

a. 4

b. 8

c. 6

d. 12

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11. What is the value of x if 13+x =20?

a. 8

b. 7

c. 9

d. 13

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12. What is the simplified value of (3x + 15) / 5x + 25)

a. 5/3

b. 3/5

c. -5/3

d. -3/5

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13. What is the diameter of the circle, if the circumference is 31.4 cm?

a. 5 cm

b. 10 cm

c. 8 cm

d. 8.5 cm

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14. What is the area of the semicircle, if the diameter is 14 cm?

a. 70 cm²

b. 76.93 cm²

c. 75.06 cm²

d. 86.93 cm²

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15. What is the area of the circle if the radius is 10 cm?

a. 314 cm²

b. 31.4 cm²

c. 30.4 cm²

d. 3.14 cm²

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16. What is the radius of a circle whose diameter is 44 cm?

a. 44 cm

b. 22 cm

c. 23 cm

d. 20 cm

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17. What is the area of the circle, if the circumference of the circle is 44cm?

a. 128 cm²

b. 130 cm²

c. 154 cm²

d. 129 cm²

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18. What is the name called biggest chord of the circle?

a. Arc

b. Diameter

c. Radius

d. Diagonal

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19. What is the circumference of a semi circle?

a. πr + 2r

b. πd / 4

c. 2πr²

d. πd² / 4

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20. What is the centre of gravity of a semi circle of diameter 12 cm?

a. 2.24 cm

b. 2.54 cm

c. 3.25 cm

d. 2.75 cm

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21. What is the centre of gravity of the lamina?

a. 1.55 cm

b. 2.0 cm

c. 1.5 cm

d. 1.45 cm

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22. What is the centre of gravity of a sphere?

a. At the centre

b. On the circumference

c. At the diameter

d. At the radius

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23. Which affects the centre of gravity of the object?

a. Weight

b. Mass

c. Density

d. Shape

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24. What is co-efficient of friction for pulling a load of 400 kg by a force of 40 kg?

a. 0.01

b. 0.2

c. 0.1

d. 0.02

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25. How much force is required to move an object weights 20 kg, if the value of m = 0.24?

a. 4.8 kg

b. 83.33 kg

c. 1.2 kg

d. 0.48 kg

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26. Which way the coolant acts as a lubricant?

a. To carry away dust

b. To carry away the heat

c. To carry away moisture

d. To carry away dryness

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27. Which is used to reduce the friction in machine parts?

a. Kerosene

b. Petrol

c. Water

d. Lubricants

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28. What is the purpose of a lubricant?

a. To increase the pressure

b. To increase friction

c. To reduce friction

d. To reduce pressure

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29. Which is wasteful friction?

a. Rear axle gear

b. Tyres on the floor

c. Brake shoe lining

d. Clutch lining

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30. Which is useful friction?

a. Rings in the cylinder

b. Crank shaft bearings

c. Wheel hub bearings

d. Brake shoe lining

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