Basic knowledge for civil engineer || Civil engineering Interview Question and answer #1

 Basic Knowledge :

1. Concrete Grade ?

M5              =>       1        :        5         :        10

M7              =>       1        :        4         :         8

M10            =>       1        :        3         :         6

M15            =>       1        :        2         :         4

M20            =>       1        :       1.5       :         3

M25            =>       1        :        1         :         2

2. What is OPC & PPC ?

OPC -  Ordinery Portland Cement

PPC -  Portland Pozzolana cement

3. What is Fe-415 ?

Fe       -  Ferrus Matarial (Iren)

415     -  Strength of steel in N/seq.mm When Tested in (UTM)

UTM  -  Universul Testing Macine

4.  How many diameter of steel bor available in market ?

Steel Bor -  8mm , 10mm , 12mm , 16mm , 20mm , 25mm , 32mm , 40mm .

5. What is standerd size of brick woll ?

External Wall  -  9 inch

Internal Wall   -  4.5 inch

6. Which instument use for on site for leveling work ?

1. DUMPY LEVEL

2. PIPE LEVEL

7. Unit Conversion ?

1 meter       =  3.28 ft                       ,    1 squ.meter   =  10.76 squ.ft

1 Acre        =  4046.86 squ.meter    ,        1 Acre       =   43560 squ.ft

1 Hactore   =  2.47  acrs                  ,       1 Hactore    =   10000 squ.meter

8. Size of cube mould ?

Length *  Width  *  Height  =  150mm * 150mm * 150mm

9. Concrete gain its strength in first ?

3 Day's    =>  40%

7 Day's    =>  65%

14 Day's  =>  90%

28 Day's  =>  99%

NOTE - After that period still concrete gain it's strength but after that periad the rate of                        going compresive strength is very low, as compared to first 28 days .

10. What is dansity of water ?

1000 kg/qub.meter

11. What is the dansity of cement ?

3150 kg/qub.meter

12. What is the dansity of glass ?

2000 TO 8000 kg/qub.meter

13. What is the size of spacer used in tile work ?

3 mm

14. What is the ratio of the plaster on external & internal walls ?

External wall  -  1 : 4

Internal wall   -  1 : 5

15. What is fullform of DPC ?

DPC - Damp Proof Course

16. What is AAC block's ?

AAC - Auto Claved Aerated Concrate Blocks

17. What is P.S.C ?

P.S.C - Pre Stressed Concrate 

18. What is the other name of AAC blocks ?

ALC - Auto Claved Lightweight Concrete 

19. What is the PH volue of water ?

P.H. volue  =>  7

20. What is the NGL level ?

NGL -  Natural Ground Level

21. Lintel thinkness should be ?

15 cm

22. DPC thinkness should be ?

2.5 cm

23. Maximum chair spacing ?

1 meter

24. Plinth height should be ?

4.5 cm

25. Minimum dia for dowel ? 

12 mm