Choose a description from COLUMN B that matches an item in COLUMN A - NSC Civil Technology Construction - Question 4 - 2022 - Paper 1
Question 4
Choose a description from COLUMN B that matches an item in COLUMN A.
Write only the letter (A–L) next to the question numbers (4.1.1 to 4.1.8) in the ANSWER BOOK, e.... show full transcript
Worked Solution & Example Answer:Choose a description from COLUMN B that matches an item in COLUMN A - NSC Civil Technology Construction - Question 4 - 2022 - Paper 1
Step 1
4.1.1 Advantage of ready-mixed concrete
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Ready-mixed concrete has the advantage of being produced in a controlled environment, ensuring consistent quality and strength. Additionally, it saves time on-site as it requires less labor for mixing.
Step 2
4.1.2 Disadvantage of ready-mixed concrete
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A major disadvantage of ready-mixed concrete is that it relies on timely delivery; any delays can impact the quality of the concrete, potentially causing it to set improperly.
Step 3
4.1.3 Boom pump
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A boom pump is used to deliver concrete to hard-to-reach areas, utilizing a long arm to place concrete at various heights and distances effectively.
Step 4
4.1.4 Slump test
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The slump test measures the workability of fresh concrete. A cone-shaped mold is filled with concrete, and its 'slump' after removal indicates the concrete's consistency.
Step 5
4.1.5 Collapsed slump
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A collapsed slump occurs when the concrete loses all shape and forms a flat surface, indicating it is too wet and lacks the proper workability.
Step 6
4.1.6 Cube test
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The cube test is a method for evaluating the compressive strength of concrete by casting it in cube-shaped molds and testing the cubes after a specific curing period.
Step 7
4.1.7 Lean pipe concrete
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Lean pipe concrete is defined by a low cement content, resulting in a weaker mix suitable for projects where high strength is not critical.
Step 8
4.1.8 High-strength concrete
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
High-strength concrete is characterized by its ability to withstand compressive stresses of over 30 MPa, typically achieved through a specific mix design and curing process.
