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Which of the following statements relates to a retarding reservoir? 1. There are no gates at the outlets and hence the possibility of human error in reservoir operation is eliminated. 2. The high cost of gate installation and also its operation is saved. 3. An automatic regulation may cause coincidence of flood crest farther downstream where two or more channels taking off from retarding reservoirs join together.
As per Indian Standard (IS) 456-2000, what is the mixing ratio (cement : fine admixture : coarse admixture) for M20 grade concrete?
Which of the following is not an admixture used to alter one or more specific properties of concrete?
Which one of the following materials is used as a bonding admixture?
Which of the following is TRUE for a flywheel which is retarding, if T is the torque on the crankshaft at any instant and Tmean is the mean resisting torque?
The displacement and velocity diagrams of a cam and follower mechanism are shown as: Which of the following statements is/are correct? 1. The acceleration of the follower at the beginning and at the end of each stroke will be zero. 2. The follower remains at rest in the dwell period. 3. During period DE, the motion of the follower is retarding. Select the correct answer using the code given below.
The most common admixture which is used to accelerate the initial set of concrete is
The most commonly used admixture which prolongs the setting and hardening time is
Which admixture is used to improve workability?
______ admixture is used to help the pavement withstand the freezing and thawing cycle.