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Materials Engineer Reviewer Part 1 - 4 with answer reference
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Materials Engineer Reviewer Part 1-4 with answer reference.
1. What is the test frequency for concrete compressive and flexural strength?
a) 1 set per 75 m3
b) 2 set per 85 m3
c) 1 set per 50 m3
d) 2 set per 75 m3
2. How many set of concrete beam specimen are you going to prepare for 800 m3 of concrete mix?
a) 5
b) 7
c) 9
d) 11
3. Concrete specimen molded in a 6" Ø x 12" cylinder should be rodded _______ times per layer.
a) 25
b) 56
c) 63
d) 10
4. Concrete specimen molded in a 6" x 6" x 21" beam should be rodded _______ times per layer.
a) 26
b) 25
c) 63
d) 62
5. Max temperature of fresh concrete
a) 32 oC
b) 31 oC
c) 30 oC
d) 29 oC
6. Immersion depth of thermometer when getting fresh concrete temperature
a) 1”
b) 2.5”
c) 3”
d) 2”
7. Use to monitor the consistency of unhardened concrete.
a) Unit weight
b) Grading
c) Slump test
d) Abrasion
8. How many strokes per layer is applied on slump test?
a) 20
b) 22
c) 23
d) 25
9. What is the approximate depth of the first layer on slump test?
a) 67 mm
b) 75 mm
c) 100 mm
d) 150 mm
10. What is the approximate depth of the first plus second layer on slump test?
a) 200 mm
b) 175 mm
c) 155 mm
d) 130 mm
11. Water Curing temperature for concrete samples.
a) 23± 2 oC
b) 22± 3 oC
c) 21± 2 oC
d) 20± 3 oC
12. Condition of concrete during compression test.
a) Dry
b) Moist
c) Wet
d) Any of the above
13. Specimen test at 28 days shall be broken within the permissible time tolerance of _____.
a) 8 h
b) 12 h
c) 20 h
d) 24 h
14. Criteria for Acceptance of concrete.
a) Average of all set of 3 exceeds specified strength and no individual strength deficient by 25%
b) Average of all set of 3 exceeds specified strength and no individual strength deficient by 20%
c) Average of all set of 3 exceeds specified strength and no individual strength deficient by 15%
d) Average of all set of 3 exceeds specified strength and no individual strength deficient by 10%
15. Concrete deemed to be not acceptable using compressive strength criteria may be rejected unless the contractor can provide evidence by means of coring. Concrete represented by cores will be considered if:
a) Average strength of cores is equal to at least 85% and no single core is less than 75% f’c.
b) Average strength of cores is equal to at least 95% and no single core is less than 90% f’c.
c) Average strength of cores is equal to at least 90% and no single core is less than 85% f’c.
d) Average strength of cores is equal to at least 85% and no single core is less than 70% f’c.
16. Truck mixer mixing speed shall be within ___.
a) 4 – 6 rpm
b) 3 – 6 rpm
c) 2 – 6 rpm
d) 3 – 5 rpm
17. Maximum drop height of placing concrete mixture shall be ___?
a) 1 m
b) 1.5 m
c) 2 m
d) 3 m
18. Pre-stressed concrete requires the use of Class ____ concrete.
a) C
b) P
c) B
d) A
19. What is the minimum cement content per m3 on a class C concrete?
a) 9
b) 9.1
c) 9.5
d) 8
20. The boundary between sand and gravel is ______.
a) 4.750 mm (#4)
b) 2.00 mm (#10)
c) 0.075 mm (#200
d) 0.425 mm (#40)
21. Concrete not place within ____ minutes from the time the ingredients were charged into the mixing drum shall not be use.
a) 120 minutes
b) 150 minutes
c) 60 minutes
d) 90 minutes
22. For sampling sand from stock pile, what is the size of tube to be inserted in the pile at random location?
a) 30 mm dia., 2 m long
b) 25 mm dia., 2 m long
c) 37 mm dia., 2 m long
d) 45 mm dia., 2 m long
23. What is the unit weight of steel?
a) 7,900 kg/m3
b) 7,800 kg/m3
c) 7,850 kg/m3
d) 8,000 kg/m3
24. What is the unit mass of a 10 mm diameter RSB?
a) 0.628 kg
b) 0.617 kg
c) 0.820 kg
d) 0.817 kg
25. What is the nominal weight of 16mm diameter x 6 m length RSB?
a) 9.468 kg
b) 9.909 kg
c) 9.280 kg
d) 9.017 kg
ANSWERS
1. A
2. D
3. A
4. C
5. A
6. C
7. C
8. D
9. A
10. C
11. A
12. B
13. C
14. C
15. A
16. A
17. B
18. B
19. C
20. A
21. D
22. A
23. C
24. B
25. A
1. What is the test frequency for concrete compressive and flexural strength?
a) 1 set per 75 m3
b) 2 set per 85 m3
c) 1 set per 50 m3
d) 2 set per 75 m3
2. How many set of concrete beam specimen are you going to prepare for 800 m3 of concrete mix?
a) 5
b) 7
c) 9
d) 11
3. Concrete specimen molded in a 6" Ø x 12" cylinder should be rodded _______ times per layer.
a) 25
b) 56
c) 63
d) 10
4. Concrete specimen molded in a 6" x 6" x 21" beam should be rodded _______ times per layer.
a) 26
b) 25
c) 63
d) 62
5. Max temperature of fresh concrete
a) 32 oC
b) 31 oC
c) 30 oC
d) 29 oC
6. Immersion depth of thermometer when getting fresh concrete temperature
a) 1”
b) 2.5”
c) 3”
d) 2”
7. Use to monitor the consistency of unhardened concrete.
a) Unit weight
b) Grading
c) Slump test
d) Abrasion
8. How many strokes per layer is applied on slump test?
a) 20
b) 22
c) 23
d) 25
9. What is the approximate depth of the first layer on slump test?
a) 67 mm
b) 75 mm
c) 100 mm
d) 150 mm
10. What is the approximate depth of the first plus second layer on slump test?
a) 200 mm
b) 175 mm
c) 155 mm
d) 130 mm
11. Water Curing temperature for concrete samples.
a) 23± 2 oC
b) 22± 3 oC
c) 21± 2 oC
d) 20± 3 oC
12. Condition of concrete during compression test.
a) Dry
b) Moist
c) Wet
d) Any of the above
13. Specimen test at 28 days shall be broken within the permissible time tolerance of _____.
a) 8 h
b) 12 h
c) 20 h
d) 24 h
14. Criteria for Acceptance of concrete.
a) Average of all set of 3 exceeds specified strength and no individual strength deficient by 25%
b) Average of all set of 3 exceeds specified strength and no individual strength deficient by 20%
c) Average of all set of 3 exceeds specified strength and no individual strength deficient by 15%
d) Average of all set of 3 exceeds specified strength and no individual strength deficient by 10%
15. Concrete deemed to be not acceptable using compressive strength criteria may be rejected unless the contractor can provide evidence by means of coring. Concrete represented by cores will be considered if:
a) Average strength of cores is equal to at least 85% and no single core is less than 75% f’c.
b) Average strength of cores is equal to at least 95% and no single core is less than 90% f’c.
c) Average strength of cores is equal to at least 90% and no single core is less than 85% f’c.
d) Average strength of cores is equal to at least 85% and no single core is less than 70% f’c.
16. Truck mixer mixing speed shall be within ___.
a) 4 – 6 rpm
b) 3 – 6 rpm
c) 2 – 6 rpm
d) 3 – 5 rpm
17. Maximum drop height of placing concrete mixture shall be ___?
a) 1 m
b) 1.5 m
c) 2 m
d) 3 m
18. Pre-stressed concrete requires the use of Class ____ concrete.
a) C
b) P
c) B
d) A
19. What is the minimum cement content per m3 on a class C concrete?
a) 9
b) 9.1
c) 9.5
d) 8
20. The boundary between sand and gravel is ______.
a) 4.750 mm (#4)
b) 2.00 mm (#10)
c) 0.075 mm (#200
d) 0.425 mm (#40)
21. Concrete not place within ____ minutes from the time the ingredients were charged into the mixing drum shall not be use.
a) 120 minutes
b) 150 minutes
c) 60 minutes
d) 90 minutes
22. For sampling sand from stock pile, what is the size of tube to be inserted in the pile at random location?
a) 30 mm dia., 2 m long
b) 25 mm dia., 2 m long
c) 37 mm dia., 2 m long
d) 45 mm dia., 2 m long
23. What is the unit weight of steel?
a) 7,900 kg/m3
b) 7,800 kg/m3
c) 7,850 kg/m3
d) 8,000 kg/m3
24. What is the unit mass of a 10 mm diameter RSB?
a) 0.628 kg
b) 0.617 kg
c) 0.820 kg
d) 0.817 kg
25. What is the nominal weight of 16mm diameter x 6 m length RSB?
a) 9.468 kg
b) 9.909 kg
c) 9.280 kg
d) 9.017 kg
ANSWERS
1. A
2. D
3. A
4. C
5. A
6. C
7. C
8. D
9. A
10. C
11. A
12. B
13. C
14. C
15. A
16. A
17. B
18. B
19. C
20. A
21. D
22. A
23. C
24. B
25. A
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