Under normal conditions using an ordinary cement, the period of removal of the formwork, is: 

If the various concrete ingredients i.e. cement, sand and aggregates are in the ratio of 1:3:6, the
grade of concrete, is

In slump test, each layer of concrete is compacted by a steel rod 60 cm long and of 16 mm
diameter for 

To hydrate 500kg of cement full water needed, is 

Concrete mainly consists of

The load carrying capacity of a helically reinforced column as compared to that of a tied column is
about 

The individual variation between test strength of sample should not be more than 

Which of the following R.C. retaining walls is suitable for heights beyond 6 m? 

Allowable shear strength of concrete, depends upon 

For a reinforced concrete section, the shape of shear stress diagram is 

‘Ware house pack’ of cement means 

The slab is designed as one way if the ratio of long span to short span is

A concrete using an air entrained cement 

For the construction of thin R.C.C. structures, the type of cement to be avoided, is  

High carbon content in the steel causes 

The surface where two successive placements of concrete meet, is known as 

For batching 1:3:6 concrete mix by volume, the ingredients required per bag of 50 kg cement, are: 

Water cement ratio is generally expressed in volume of water required per 

If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete
provided maximum nominal size of aggregate, does not exceed 

Particles of 0.002 mm size are that of 

Admixtures which cause early setting and hardening of concrete are called  

The average permissible stress in bond for plain bars in tension is

A beam curved in plan is designed for

For the construction of cement concrete dams, the maximum permissible size of the aggregates, is

The minimum cover in a slab should neither be less than the diameter of the bar nor less than