Practice Tests To Perform (12.1) - Objectives of Mix Design - Civil Engineering Materials, Testing & Evaluation - Vol 2

Practice: Tests to Perform

Lesson 12.1Objectives of Mix Design

Practise this section

8 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What does a slump test measure?
Show hintHide hint
Think about the ease of placement.
Question 2.
Why is compressive strength tested at 7 and 28 days?
Show hintHide hint
Consider the curing process of concrete.
3Question 3.
What is the primary purpose of the slump test?
- To measure density
- To evaluate workability
- To determine strength
Show hintHide hint
Consider what ease of placement means.
4Question 4.
True or False: Compressive strength tests should only be performed at 28 days.
- True
- False
Show hintHide hint
Think about early strength development.
Question 5.
You are tasked with designing a concrete mix for a project but your initial test shows a slump of only 25mm when 100mm is ideal. Discuss possible adjustments and their implications.
Show hintHide hint
Be mindful of the water-cement ratio in your adjustments.
Question 6.
During compressive strength testing, if you unexpectedly find a cube failing at 20 MPa while the target is 30 MPa, what might be the causes, and how would you address them?
Show hintHide hint
Think about common issues in material selection or mixing.

4 more questions in this section. Enroll free to practise them all.