What is QA QC Civil Engineer interview Questions?

 

What's the function of packing accoutrements in the joint of concrete pipes in pipe jacking?

 

Quilting accoutrements are about 10 mm to 20 mm thick and are typically made of plywood, fibreboard or other accoutrements . In case packing accoutrements are absent in pipe joints for pipe jacking, also any deviation in the joints reduces the contact area of the concrete and it leads to spalling of joints due to high stresses convinced. With the insertion of quilting material inside the pipe joints, the permissible deviation without damaging the joint during the pipe jacking process can be increased.

 

Cad drawing of stair case

 For drained recovery, what's the significance of smear zone convinced by installation of band rainspouts?

During installation of band rainspouts, smear zones are created in which zones of soil girding the band rainspouts are disturbed. The compressibility of girding soils is increased and it results in the reduction of their permeability. In fact, the girding soils are remoulded during the installation process and the effectiveness of band rainspouts is reduced. In substance, for the reduced permeability of soils around band rainspouts, it takes longer time to complete the connection process.

 

 What are the causes of erecting collapse?

The Passage of time is one reason. structures also collapse due to weak foundations. Earthquakes, hurricanes and other natural disasters can also damage the structure of the structures and beget it to collapse. Bombings or obliteration of structures is also other reasons.  

 

 In opting screw pumps in polder scheme systems, what are the factors that affect the design capacity of screw pumps?

The generally used angles of inclination for screw pumps are 30 °, 35 ° and 38 °. For screw pumps of fairly high lifting head, like over6.5 m, angle of inclination of 38 ° is typically used. still, for fairly lower head and high discharge demand, angle of inclination of 30 ° shall be named. In general, for a given capacity and lifting head, the screw pump periphery is lower and its length is longer for a screw pump of 30 ° inclination when compared with a screw pump of 38 ° inclination.

 

 To increase the discharge capacity of screw pumps, a larger number of breakouts should be named. In fact, screw pumps with 2 breakouts are more provident that that with 3 breakouts in terms of effectiveness and manufacturing cost. also, the discharge capacity is also determined by the screw pump periphery and sizes of 300 mm to 5000 mm are available in current request.

 

What's the cargo transfer medium for paving blocks in rambler footway?

In Hong Kong, footway is typically designed with paving crossbeams interlocking blocks rather of concrete because the expansive use of concrete in pavement is boring. also, poor appearance will affect in concrete pavement due to constantly fosse openings for mileage work.

 In  addition, owing to the prolonged setting and curing time of concrete, the use of concrete pavement inescapably generates disturbance to the general public.

The rambler loads are taken up through the following ways

 1. cargo carrying capacity of paving crossbeams interlocking blocks are deduced from their individual strength;

 2. Pedestrian loads are also supported by interlocking forces handed by disunion transfer through the beach in perpendicular joints(K.K. Tang & RobertP. Cooper( 1986).