1) what is curing. 2) Defferent between development length and lapping. 3) what is M 25 4) Definition of specific gravity and density. 5) What type of slump test. 6) what is segregation and bleeding. 7) Difference between nominal mix design. 8) Minimum Dia of chair use.

Question

Accepted Answer

Answers to interview questions for Tower Engineer position.

1) Curing is the process of maintaining moisture and temperature conditions in concrete for hydration to occur.
2) Development length refers to the length of reinforcement required to transfer stress from one concrete element to another, while lapping is the overlapping of reinforcement bars to ensure continuity.
3) M25 is a designation for a concrete mix with a characteristic compressive strength of 25 megapascals (MPa) after 28 days.
4) Specific gravity is the ratio of the density of a substance to the density of a reference substance, while density is the mass per unit volume of a substance.
5) Slump test is used to measure the consistency or workability of fresh concrete by measuring the slump or settlement of the concrete when a cone-shaped mold is removed.
6) Segregation refers to the separation of coarse aggregates from the concrete mix, while bleeding is the process of water rising to the surface of freshly placed concrete.
7) Nominal mix design is a method of proportioning concrete using nominal ratios of cement, sand, and aggregate, while mix design involves determining the proportions of individual ingredients based on desired concrete properties.
8) The minimum diameter of a chair used in concrete construction depends on the size of the reinforcement bar being supported and is typically specified in construction codes or standards.

Accepted Answer

1 Curing of concrete increases the strength of concrete. Curing is done for a minimum of 7 days.

2. Development length is that which the load of one member is transferred to another member. Lapping length is that which the load of one steel bar is transferred to another steel bar

3 M-25 is a concrete grade whose ratio is 1:1:2.

4 specific gravity is the ratio of a material s density with that of water at 4 'C

5 Slump test is done for workability

Type of slump- true slump,shear slump,collapse slump

6 segregation prencipal ingredients in other words gravel aggregate,cement,and water

Segregation causes excessive amount of water to rise to surface this prosess is know as bleeding

7 the nominal mix may be used for concrete of M20 grade or lowergrade design mixed is used for more extensive and important concrete work generally used M25 and above

8 minimum dia of chair used 12 mm

1) what is curing. 2) Defferent between development length and lapping. 3) what is M 25 4) Definition of specific gravity and density. 5) What type of slump test. 6) what is segregation and bleeding. 7) Difference between nominal mix design. 8) Minimum Dia of chair use.

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