Civil Site Knowledge for Civil Engineering Students by Learning Technology
Q1. What is the compressive strength of ordinary Portland cement after three days?
Answer: The compressive strength of ordinary Portland cement after three days shall not be less than 16 MPa.
Q2. What is the effect on the Bulking of Sand with an increase in moisture content?
Answer: With an increase in moisture content, the bulking of sand first increases to a certain maximum value and then decreases.
Q3. Name the main constituent of cement which is responsible for initial / Early strength of cement?
Answer: The main constituent of cement which is responsible for initial / Early strength of cement is Tricalcium Silicate.
Q4. What is the standard mortar mixing ratio of Cement and sand for testing the Compressive and Tensile strength of cement?
Answer: The standard mortar mixing ratio of Cement and sand for testing Compressive and Tensile strength of cement is 1:3.
Q5. What is the normal consistency of ordinary Portland cement?
Answer: The normal consistency of ordinary Portland cement is about 30%. As per IS 4031 Part-4, Generally it ranges between 26 to 33 percent.
Q6. What is the proportion of cement and sand for the plaster of the septic tank?
Answer: The proportion of cement and sand for the plaster of septic tank is 1:3 (1 part cement and 3 part sand).
Q7. What is the basic purpose of retarders in concrete?
Answer: The basic purpose of retarders in concrete is to increase the initial setting time of cement paste in concrete.
Q8. What is the relation between Length and Width of Septic Tank?
Answer: If L is the length and W is the width of the septic tank, then
Minimum Length = 2 x Width
Maximum Length = 4 x width
