Applied Science - Pressure Pre-core Assignment

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Reference no: EM132418780

Applied Science - Pressure Pre-core Assignment, ADNOC Technical Academy, UAE

1. Four blocks each weighing 10N rest on a horizontal table. Which block applies the greatest pressure on the table?

2. A nail is squeezed between finger and thumb. Which statement is correct?

(a) The force of the pin is larger on the finger than on the thumb.

(b) The force of the pin is larger on the thumb than on the finger.

(d) The pressure of the pin is larger on the thumb than on the finger.

3. Same weight is applied on two wheels but one wheel is narrow and one is wide. Which statement is correct?

(a) The force on the narrow wheel is greater.

(b) The pressure on the narrow wheel is greater.

(d) The force on the wide wheel is greater.

4. The block shown below was placed on soil. The block will go in the soil:

(a) Deeper when its placed on side A

(b) Deeper when its placed on Side B

(d) None of the answers is correct

5. All of the following are units of pressure except:

(a) Pascal (Pa)

(b) Newton per square meter (N/m²)

(d) Centimeters of mercury cmHg

6. Which of the following is a unit of pressure?

(a) N

(b) bar

(d) b and c are correct

7. The ______________ the area, the larger is the pressure applied

(a) Bigger

(b) Smaller

(d) None of the answers

8. 2 bar is equal to ____________________ m H₂O

(a) 152

(b) 20.44

(d) 206.8

9. 150 cm Hg = ____________________________ KPa

(a) 199.5

(b) 1995

(d) 19.95

10. 512 psi = ________________________________ bars

(a) 3.4816

(b) 34.816

(d) 3481.6

11. 6 psi = ________________________________ KPa.

(a) 4.1334

(b) 413.34

(d) 4133.4

12. 3 m H₂O =_________________ cm Hg

(a) 2.205

(b) 22.05

(d) 220.5

13. Which of the following is a fluid?

(a) Water

(b) Sand

(d) a and c are correct

14. Which of the following is not a fluid?

(a) Crude oil

(b) Iron

(d) petrol

15. At which point in the container is the static pressure greatest?

(a) A

(b) B

(d) none of the answers is correct

16. 4 beakers are filled with different liquids to the same height as shown in the picture below. Which liquid causes the greatest static pressure at the bottom of the beaker?

(a) Mercury

(b) Water

(d) Petrol

17. Static pressure is measured by an instrument called

(a) Barometer

(b) Thermometer

(d) Hydrometer

18. A Liquid in the container shown below exerts pressure on point X in the container when it is at sea level.

How does the pressure change if the container is taken to the top of a mountain?

(a) Increases

(b) Decreases

(d) Increases then decreases

19. A liquid is poured into the apparatus shown below.

The level of liquid will be:

(a) Higher in A

(b) Higher in B

(b) Higher in C

(d) The same in A, B, C and D

Fill in the blanks:

20. _________ is the pressure due to the weight of the column of liquid above the object.

21. As the depth _________, static pressure increases.

22. As the density of the liquid increases, static pressure _________.

23. Static decreases as the altitude _________.

24. Static pressure acts in all _________.

25. As diagrammed below, an operator applies a force of 200 N to the first piston of a hydraulic lift, which has an area of 5.4 m².

What is the pressure applied to the hydraulic fluid?

(a) 3.7 Pa

(b) 37 Pa

(d) 370 Pa

26. If the second piston in the lift diagrammed above exerts a force of 41,000 N, and the pressure on the hydraulic fluid by the first piston is 3.7 Pa, what is the area of the second piston?

(a) 110.8 m²

(b) 0.1108 m²

(d) 1108 m²

27. In hydraulic machines the pressure applied on one piston will be ________ the pressure transmitted to the second piston.

(a) Greater than

(b) Equal to

(d) None of the answers is correct.

28. Which of the following machines uses the principle of hydraulics?

(a) Car jack

(b) Garage lift

(d) All of the answers are correct.

29. If a force is applied on the piston with small area of a hydraulic machine it will give ________________ force on the piston with the larger area.

(a) a smaller force

(b) a larger force

(d) none of the answers.

30. Atmospheric pressure is always directed

(a) Up

(b) Down

(d) In all directions

31. Atmospheric pressure ________________ as altitude increases.

(a) Decreases

(b) Increases

(d) None of the above

32. Atmospheric pressure is greatest at

(a) The top of the mountain

(b) The sea level

(d) a and c are correct

33. Where is the atmospheric pressure lowest?

(a) At A

(b) At B

(d) At D

34. The density of air is maximum at

(a) The top of the mountain

(b) The sea level

(d) a and c are correct

35. Which instrument is used to measure atmospheric pressure?

(a) Thermometer

(b) Hydrometer

(d) None of the answers is correct

36. Which instrument is used to measure gas pressure?

(a) Manometer

(b) Barometer

(d) None of the answers is correct

37. Which of the instruments below is not used to measure pressure?

38. The picture below shows a mercury barometer.

Which distance is used to measure the pressure of the atmosphere?

(a) 25 cm

(b) 75 cm

(d) 100 cm

39. What is the differential pressure in Kpa

(a) 8 Kpa

(b) 10.64 Kpa

(d) 106.4 Kpa

40. What is the atmospheric pressure in Kpa

(a) 1.2 Kpa

(b) 12.156 Kpa

(d) 1215.6 Kpa

41. What is the pressure of the gas in Kpa

(a) 132.2 Kpa

(b) 13.22 Kpa

(d) 1322 Kpa

42. Diagram 1 show some air trapped in a cylinder. Diagram 2 shows the same air after the piston has been pushed slowly. The pressure of air in diagram 1 is 1 bar. What will be the pressure of air in diagram 2?

(a) 1 bar

(b) 0.5 bar

(d) none of the answers is correct.

43. At a constant temperature, if the pressure of a gas increases, its volume will

(a) Increase

(b) Decrease

(d) None of the answers is correct.

44. A gas is filled in an expandable cylinder as shown in the diagram below. If the volume of the gas doubled what will happen to its pressure?

(a) It will be doubled

(d) None of the answers is correct.

45. The picture below represents molecules of a gas contained in a cylinder. If the cylinder is placed in a hot place, how does the piston move?

(a) The piston moves up

(b) The piston moves down

(d) None of the answers is correct

46. A balloon is filled with helium gas. What will happen to the balloon's volume in clod weather?

(a) It will increase

(b) It will decreases

(d) None of the answers is correct

47. What happens to the volume of the air balloon shown below when the air inside the balloon is heated?

(a) Volume increases

(b) Volume decreases

(d) None of the answers is correct

48. A gas occupies a volume of 3 liter at a temperature of 250 K and at a pressure of 1.5 bar. What will be the volume if the temperature is increased to 450 K and the pressure remains constant?

(a) 54 liters

(b) 0.54 liters

(d) 5.4 liters

49. The tire shown below is placed in the sun. What happens to the pressure of air inside the tire?

(a) Increases

(b) Decreases

(d) None of the answers is correct.

50. What happens to the balloons when it is heated as shown in the diagram below and why?

(a) It will burst because the pressure inside it will decrease.

(b) It will burst because the pressure inside it will increase.

(d) None of the answers is correct.

51. A gas is filled inside a cylinder that has a fixed volume. The gas is has a pressure of 1 atm when the temperature is 300 K. What will be the pressure if the temperature is decreases to 150 K.

(a) 2 atm

(b) 1 atm

(d) 0.5 atm

52. Gas with a volume of 10.0 L is trapped in an expandable cylinder at a pressure of 200 KPa and a temperature of 300 K. If the pressure is tripled and the temperature is increased to 400K, what will be the new volume of the gas?

(a) 4.4 L

(b) 44.66 L

(d) 4444 L

53. A gas is filled in a cylinder as shown in the diagram below. The gas occupies a volume of 2 litters at a temperature of 300 k and a pressure of 1 bar. What will be its new volume at a pressure of 0.5 bars and a temperature of 600 K.

(a) 2 liters

(b) 4 liters

(d) 8 liters.

Reference no: EM132418780

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