Measurement
1. How close a measurement comes to an accepted value is called its
A. accuracy.
B. precision.
C. uncertainty.
D. certainty.
E. absolute value.
2. The last digit recorded in a measurement
A. should not have any uncertainty.
B. is the last absolutely certain digit.
C. has some uncertainty but gives some useful information.
D. has some uncertainty and gives no useful information.
E. is always put in just to show the decimal place.
3. Which statement best describes the data below if the real value is 4.54 g?
i) 4.42 g ii) 4.77 g iii) 4.64 g iv) 4.68 g
A. accurate and precise
B. neither accurate nor precise
C. accurate but not precise
D. precise but not accurate
4. Which statement best describes the data below if the real value is 4.54 g?
i) 4.67 g ii) 4.66 g iii) 4.67 g iv) 4.68 g
A. accurate and precise
B. neither accurate nor precise
C. accurate but not precise
D. precise but not accurate
5. Which statement best describes the data below if the real value is 4.67 g?
i) 4.67 g ii) 4.66 g iii) 4.67 g iv) 4.68 g
A. accurate and precise
B. neither accurate nor precise
C. accurate but not precise
D. precise but not accurate
6. Which statement best describes the data below if the real value is 4.66 g?
i) 4.69 g ii) 4.61 g iii) 4.63 g iv) 4.71 g
A. accurate and precise
B. neither accurate nor precise
C. accurate but not precise
D. precise but not accurate
7. An electronic balance gave identical readings for three different students
for the same evaporating dish (47.68 g). It was found that the balance was
improperly set and that the real value should have been 49.21 g. In this example
the readings were
A. accurate and precise
B. neither accurate nor precise
C. accurate but not precise
D. precise but not accurate
8. When the numbers 550 and 38.44 are added the result is
A. 590
B. 580
C. 588
D. 588.44
9. When the numbers 21.1 and 210 are added the result is
A. 230
B. 231
C. 231.0
D. 231.1
10. When 0.00651, 0.026 and 0.8342 are added the result is
A. 0.86671
B. 0.8667
C. 0.866
D. 0.867
11. When 0.652, 26.30 and 0.8342 are added the result is
A. 27.7862
B. 27.786
C. 27.79
D. 27.8
12. When 0.6505, 0.26000 and 0.8345 are added the result is
A. 1.74
B. 1.75
C. 1.745
D. 1.7450
13. When 0.65, 0.26050 and 0.8445 are added the result is
A. 1.76
B. 1.75
C. 1.755
D. 1.7450
14. When 4.5x10-1 is subtracted from 1.451 the difference is
A. 1.001
B. 1.000
C. 1.00
D. 1.0
E. 1
15. When 1.60x10-4 is subtracted from 0.005160 the difference is
A. 5 x 10-3
B. 5.0 x 10-3
C. 5.00 x 10-3
D. 5.000 x 10-3
16. When 5.1x10-3 is subtracted from 0.005110 the difference is
A. 6 x 10-5
B. 6.0 x 10-5
C. 0.00001
D. 0
17. The piece of equipment that would give the least accurate measurement for the
volume of a particular liquid would be a
A. volumetric flask.
B. graduated cylinder.
C. beaker.
D. pipet.
18. The most accurate mass of a single lead shot can be found by
A. weighing 50 pieces of lead shot and dividing the result by 50.
B. weighing 100 pieces of lead shot and dividing the result by 100.
C. weighing a single lead shot.
D. weighing 10 pieces of lead shot and dividing the result by 10.
19. 298 K are equal to how many oC?
A. 571
B. 0
C. 25
D. -25
20. 273 oC are equal to how many K?
A. 0.0
B. 546
C. 373
D. 100
21. 25 K are equal to how many oC?
A. 298
B. -248
C. 248
D. -298
22. Convert 0.0068 kg to g.
A. 0.068 g
B. 0.68 g
C. 6.8 g
D. 68 g
23. Convert 682 g to kg.
A. 0.0682 kg
B. 0.682 kg
C. 6.82 kg
D. 682 000 kg
24. Convert 0.870 kJ to J.
A. 870. J
B. 87.0 J
C. 8.70 J
D. 8700 J
25. Convert 2 500 J to kJ.
A. 250 kJ
B. 25.0 kJ
C. 2.5 kJ
D. 0.25 kJ
26. Convert 2 5 kJ to J.
A. 2 500 J
B. 25 000 J
C. 2.5 J
D. 0.025 J
27. Convert 6.8 mg to g.
A. 0.006 8 g
B. 0.068 g
C. 68 g
D. 680 g
28. Which of the following is not an SI unit?
A. litre
B. Kelvin
C. mile
D. joule
29. 240 ÷ 863 =
A. 0.27
B. 0.28
C. 0.278
D. 0.279
30. 24.000 ÷ 8.60 =
A. 2.79
B. 2.80
C. 2.81
D. 2.791
31. 240.0 ÷ 86.300 =
A. 0.27809
B. 0.28
C. 0.278
D. 0.2781
32. 0.5000 ÷ 0.253 =
A. 2
B. 2.0
C. 1.97
D. 1.98
33. 81.169 ÷ 3.14 =
A. 25.85
B. 25.8
C. 25.9
D. 25.80
34. The answer to the question ( 4.560 x 10-4) ÷ (3.2 x 10-5), expressed to
the correct number of significant digits is:
A. 14.25
B. 1.425 x 101
C. 1.425 x 10-9
D. 1.4 x 101
35. 1.0 x 6.30 =
A. 6.3
B. 6.30
C. 6.300
D. 6
E. 10
36. The dimensions of a rectangle are recorded as follows:
length = 17.00 cm
width = 1.00 cm
The best answer for the calculation of the area is
A. 17 cm2.
B. 17.0 cm2.
C. 17.00 cm2.
D. 20 cm2.
37. The measured quantities 53.4 multiplied by 2.11 will have how many significant digits?
A. 2
B. 3
C. 4
D. 6
38. The best answer for the multiplication 3.21 cm x 18 cm is
A. 57 cm2.
B. 57.78 cm2.
C. 58 cm2.
D. 60 cm2.
39. 9.006 ÷ 0.003602 =
A. 2500.
B. 2501
C. 2500.2776
D. 2500
E. 2500.278
40. When the number 56090 is rounded to 2 significant digits the result is
A. 5.60 x 104
B. 5600.
C. 56000.0
D. 5.6 x 104
41. When the number 3.76 is rounded to 2 significant digits the result is
A. 3.6
B. 3.7
C. 3.8
D. 4.0
42. When the number 2089 is rounded to 2 significant digits the result is
A. 21
B. 2.0 x 102
C. 2100
D. 2080
43. When the number 51480 is rounded to 3 significant digits the result is
A. 514
B. 515
C. 5.15 x 102
D. 5.15 x 104
44. Which statement is FALSE, for the number 80.098 rounded off as indicated?
A. Equals 80.1 to the nearest tenth.
B. Equals 80.09 to the nearest hundredth.
C. Equals 80 to the nearest ones.
D. Equals 80 to the nearest tens.
E. Equals 80.098 to the nearest thousandths.
45. When multiplying exponential numbers the exponents are
A. multiplied
B. divided
C. added
D. subtracted
46. When dividing exponential numbers the exponents are
A. multiplied
B. divided
C. added
D. subtracted
47. When adding or subtracting exponential numbers the _____ must be the same.
A. exponent
B. base
C. expnonent and the base
D. number
48. Which of the following does not have three significant figures?
A. 0.106
B. 1 250 000
C. 14.0
D. 0.470
E. 0.016
49. The number of significant digits in the number 0.0036050 is
A. 3
B. 4
C. 5
D. 7
E. 8
50. The number of significant digits in the number 4.50030 x 10-3 is
A. 1
B. 3
C. 5
D. 6
E. 7
51. Which of the following values has 3 significant digits.
A. 100.0
B. 0.032
C. 6.00
D. 0.09
52. How many significant digits are contained in the number 0.005670?
A. three
B. four
C. six
D. seven
53. The number 0.002 has how many significant digits?
A. 1
B. 2
C. 3
D. 4
54. The number 0.08 has how many significant digits?
A. 1
B. 2
C. 3
D. 4
55. The number 0.00200 has how many significant digits?
A. 1
B. 3
C. 5
D. 6
56. The number 0.000900 has how many significant digits?
A. 1
B. 3
C. 6
D. 7
57. The number 0.9005 has how many significant digits?
A. 2
B. 3
C. 4
D. 5
58. The number 7005.0 has how many significant digits?
A. 2
B. 3
C. 4
D. 5
59. The number 700.0 has how many significant digits?
A. 1
B. 2
C. 3
D. 4
60. The number that has 1 significant digit is
A. 2.0
B. 4.004
C. 0.005
D. 60.
61. The number that has 1 significant digit is
A. 300
B. 0.040
C. 0.500
D. 60.3
62. The number that has 2 significant digits is
A. 300
B. 0.040
C. 0.550
D. 6.30
63. The number that has 2 significant digits is
A. 31
B. 0.980
C. 550.0
D. 6.30
64. The number that has 3 significant digits is
A. 303.00
B. 0.980
C. 550.0
D. 6.030
65. Which of the following has an infinite number of significant digits?
A. 12.4 dozen
B. 6.700 h
C. 1 x 106 s/Ms
D. 1000 m/s
66. Which of the following has an infinite number of significant digits?
A. 12 eggs/dozen
B. 24 h/day
C. 1 x 103 mg/g
D. A, B and C.
67. Which of the following has an infinite number of significant digits?
(They are also known as exact numbers.)
A. 60 s/min.
B. 1000 watts/kilowatt
C. 12 inches/foot
D. A, B and C.
68. Which of the following has an infinite number of significant digits?
A. 60 minutes
B. 1000 watts
C. 12 inches
D. A, B and C are incorrect.
69. How many significant digits are there in the measured quantity of 0.0322 m?
A. 3
B. 5
C. 4
D. 2
70. The quantity 13.76 mL has how many significant figures.
A. 4
B. 3
C. 2
D. 1