The main compound responsible for the strength of cement at 28 days is:

The minimum grade of concrete to be used in RCC as per IS 456:2000 is:

The partial safety factor for concrete (γc) in limit state design is:

The primary hydration product of cement that contributes to its strength is:

The maximum water-cement ratio for achieving a concrete grade of M25 is:

The characteristic compressive strength of M20 concrete is:

The accumulation of water on the outer surface of the concrete is:

Who invented Portland cement and in which year?

Time elapsed from the instance of adding water until paste ceases to behave as fluid is called:

Which of the following adds a quick-setting property to cement?

In the figure below, what does ‘a’ represents?

In the figure what is ‘b’ and its function

The initial setting time of concrete should be less than 30 minutes

The final setting time of Concrete should be not more than 10 hours

How much does a bag of cement weigh?

What are plasticizers?

Is it possible to use w/c ratio as low as 0.5?

Pick up the correct statement from the following

Workability of concrete is directly proportional to __________

Workability of concrete is measured by __________

What is curing?

Identify the method of curing

Concrete gains strength due to

Log Angles machine is used to test the aggregate for

A lower W/C ratio leads to _____

This strain increases over time due to _________

After the curing of 28 days, the concrete gains strength upto _____________

In Ultrasonic Pulse Velocity test, the strength and quality of concrete or rock is assessed by measuring the ___ of an ultrasonic pulse

Compressive strength of Concrete can be tested using following equipment