Concrete Technology Question/CT Question One liner notes

एसएससी जेइ में कंक्रीट तकनीकी से पूछे जाने वाले प्रश्न

Ques-1- Characteristic strength of concrete is measured at:
Ans- 28 day

Ques-2- M-50 is considered as ____ type of concrete 
Ans- Standard 

Ques-3- Ordinary concrete is not used for concrete 
Ans- M40

Ques-4- Poisson's ratio for concrete 
Ans- Increases with richer mixes 

Ques-5- Permissible compressive strength of M-20 concrete grade is:
Ans- 200 kg/cm2

Ques-6- The best type of ballast is:
Ans- Granite 

Ques-7-  I.S.I. has specified the full strength of concrete after
Ans- 28 day after

Ques-8- The ratio of various ingredients ( cement, sand, aggregate) in concrete of grade M-20 is:
Ans- 1 : 1.5 : 3 

Ques-9- The characteristic strength of concrete in the actual structure is taken as:
Ans- 0.67 fck

Ques-10- The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is -
Ans- Provided more on front face than on inner face

Ques-11- Bulking of sand is maximum if moisture content is about -
Ans- 4 %

Ques-12- Diagonal tension in a beam - Ans- Increases below the neutral axis and decreases above the neutral axis

Ques-13- According to IS: 4561978, the column or the strut is the member whose effective length is greater than Ans- 3 times the least lateral dimension

Ques-14- When shear stress exceeds the permissible limit in a slab, then it is reduced by -
Ans- Increasing the depth


Ques-15- The aggregate in which particle of all sizes are present in various proportions is called
Ans- graded aggregate


Ques-16- The maximum size of coarse aggregate for the concrete in a column of size 400 x 400 mm should be
Ans- 20 mm

Ques-17- As the size of coarse aggregate decreases, the workability of concrete
Ans- decreases


Ques-18- Shape of crushed rocks is-
Ans- angular

Ques-19- To determine the modulus of rupture, the size of test specimen used is
Ans- 150 × 150 × 700 mm

Ques-20- The shape of  laminated rock is
Ans- flaky

Ques-21- Admixtures which cause early setting and hardening of concrete are called
Ans- Accelerators


Ques-22- The slab is designed as one way if the ratio of long span to short span is
 Ans- Greater than 2

Ques-23- For the construction of cement concrete dams, the maximum permissible size of the aggregates, is
Ans- 40 mm

Ques-24- Following shape of particle is not desirable in aggregate
Ans- flaky

Q-25- Flaky shape is not desirable because it has
Ans- highest surface area for given volume

                                     By-Rk maurya 
     

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