McAfee interview questions and answers - Wikitechy https://www.wikitechy.com/interview-questions/tag/mcafee-interview-questions-and-answers/ Interview Questions Tue, 07 Sep 2021 12:14:20 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png McAfee interview questions and answers - Wikitechy https://www.wikitechy.com/interview-questions/tag/mcafee-interview-questions-and-answers/ 32 32 What is unit operation ? https://www.wikitechy.com/interview-questions/chemical-engineering/what-is-unit-operation/ https://www.wikitechy.com/interview-questions/chemical-engineering/what-is-unit-operation/#respond Thu, 05 Aug 2021 06:58:47 +0000 https://www.wikitechy.com/interview-questions/?p=1481
  • In unit operations their is only physical change is occur but no chemical change take place or we can say no chemical reaction take place.
  • Evaporation, Distillation, Liquid liquid extraction, Drying, Size reduction, Crystallization are the example of unit operations.
  • In these operations thier is only physical change take place like phase will be change or two or more substances are separated each other or particle size will reduce.
  • Unit operations are processes related to physical changes of the materials involved:
    • Mixing (Solid-Solid, Solid-Liquid, Solid-Gas, Liquid-Liquid, Liquid-Gas, Gas-Gas)
    • Separating (Sieving, Filtration, Distillation, Fractional crystallization, Fractional freezing, Centrifugation)
    • Heating / Cooling of materials
    • Transporting (Solids, Granulates, Liquids, Slurries, Pastes, Gases)
    • Measuring (Weighing, Volumetrizing, Counting)

unit operation

]]> https://www.wikitechy.com/interview-questions/chemical-engineering/what-is-unit-operation/feed/ 0 What is the minimum compressive strength of a brick according to IS codes ? https://www.wikitechy.com/interview-questions/civil-engineering/what-is-the-minimum-compressive-strength-of-a-brick-according-to-is-codes/ https://www.wikitechy.com/interview-questions/civil-engineering/what-is-the-minimum-compressive-strength-of-a-brick-according-to-is-codes/#respond Thu, 05 Aug 2021 06:51:16 +0000 https://www.wikitechy.com/interview-questions/?p=1435
  • Compressive strength test on bricks are meted out to see the load carrying capability of bricks under compression. This test is meted out with the assistance of compression testing machine.
  • Bricks are usually used for construction of load bearing masonry walls, columns and footings. These load bearing masonry structures experiences largely the compressive loads. Thus, it’s necessary to understand the compressive strength of bricks to envision for its suitableness for construction.
  • Apparatus, sampling, procedure and calculations to see the compressive strength of bricks are mentioned below.
  • Minimum compressive strength of brick varies for different grades of bricks
    • For Common building brick = 35kg/sq. cm
    • For second class brick = 70kg/sq. cm
    • For First class brick = 105kg/sq. cm
    • For AA class brick = not less than 140kg/sq. cm
]]> https://www.wikitechy.com/interview-questions/civil-engineering/what-is-the-minimum-compressive-strength-of-a-brick-according-to-is-codes/feed/ 0 How many steel is require in one sqft area ? https://www.wikitechy.com/interview-questions/civil-engineering/how-many-steel-is-require-in-one-sqft-area/ https://www.wikitechy.com/interview-questions/civil-engineering/how-many-steel-is-require-in-one-sqft-area/#respond Thu, 05 Aug 2021 06:47:16 +0000 https://www.wikitechy.com/interview-questions/?p=1434
  • It relies on the height of the building.
  • In the event that the structure is G + 3 the steel utilization is around 2.5 kg per sq.ft.
  • In the event that the structure is tower of 15 storeys the steel utilization can be as high as 6 kg for every sq.ft.
  • For towers which are 25 storeys high steel utilization is 7.5kg per sq.ft.
]]> https://www.wikitechy.com/interview-questions/civil-engineering/how-many-steel-is-require-in-one-sqft-area/feed/ 0 Calculate the requirements of Sand , Bricks and Cement (per sq.ft) to build a low rise building ? https://www.wikitechy.com/interview-questions/civil-engineering/calculate-the-requirements-of-sand-bricks-and-cement-per-sq-ft-to-build-a-low-rise-building/ https://www.wikitechy.com/interview-questions/civil-engineering/calculate-the-requirements-of-sand-bricks-and-cement-per-sq-ft-to-build-a-low-rise-building/#respond Thu, 05 Aug 2021 06:44:36 +0000 https://www.wikitechy.com/interview-questions/?p=1433

Calculate the requirements of Sand , Bricks and Cement (per sq.ft) to build a low rise building ?

  • This is the method to calculate number of bricks and sand and cement on 10 ft height 10 ft length 4-inch wall (building inner wall) with 1:4 ratio.
  • Since you said it is an inner wall, i am assuming it as partition wall without any opening in case 1.
    1. For 10′x10′x4″ wall you need
    2. Bricks = 476 No’s
    3. Cement = 57 kg (125.66 pound)
    4. sand = 0.237 m^3 (8.3695 cft)
  • Now, let’s see “How can we calculate quantity of different materials” Opening (Door) of 1.0m x 2.1m

]]> https://www.wikitechy.com/interview-questions/civil-engineering/calculate-the-requirements-of-sand-bricks-and-cement-per-sq-ft-to-build-a-low-rise-building/feed/ 0 Is excessive curing for brick work is good or bad for the walls ? https://www.wikitechy.com/interview-questions/civil-engineering/is-excessive-curing-for-brick-work-is-good-or-bad-for-the-walls/ https://www.wikitechy.com/interview-questions/civil-engineering/is-excessive-curing-for-brick-work-is-good-or-bad-for-the-walls/#respond Thu, 05 Aug 2021 06:40:16 +0000 https://www.wikitechy.com/interview-questions/?p=1432
  • Excessive curing is bad for the walls because it causes fungi formation on the bricks which may weaken the walls.

Importance of Curing

  • Curing is the process of controlling the rate and extent of moisture loss from concrete to ensure an uninterrupted hydration of Portland cement after concrete has been placed and finished in its final position.
  • Curing also ensures to maintain an adequate temperature of concrete in its early stages, as this directly affects the rate of hydration of cement and eventually the strength gain of concrete or mortars.
  • Curing of concrete must begin as soon as possible after placement & finishing and must continue for a reasonable period of time as per the relevant standards, for the concrete to achieve its desired strength and durability. Uniform temperature should also be maintained throughout the concrete depth to avoid thermal shrinkage cracks. Also protective measures to control moisture loss from the concrete surface are essential to prevent plastic shrinkage cracks.
  • In a nut shell, curing process is designed primarily to keep the concrete moist by controlling the loss of moisture from the body of concrete, during the given period in which it gains strength.
]]> https://www.wikitechy.com/interview-questions/civil-engineering/is-excessive-curing-for-brick-work-is-good-or-bad-for-the-walls/feed/ 0 What is the maximum strength of cub compress strength in one cub testing ? https://www.wikitechy.com/interview-questions/civil-engineering/what-is-the-maximum-strength-of-cub-compress-strength-in-one-cub-testing/ https://www.wikitechy.com/interview-questions/civil-engineering/what-is-the-maximum-strength-of-cub-compress-strength-in-one-cub-testing/#respond Thu, 05 Aug 2021 06:35:08 +0000 https://www.wikitechy.com/interview-questions/?p=1431

What is the maximum strength of cub compress strength in one cub testing ?

  • First of all, we make the concrete cube at some mix proposition as M15, M20.
  • Then after one day the curing on concrete cube at 7days or 28days and we find out the compressive strength of concrete

Sampling of Cubes for Test :

  • Clean the mounds and apply oil.
  • Fill the concrete in the molds in layers approximately 5cm thick.
  • Compact each layer with not less than 35strokes per layer using a tamping rod (steel bar 16mm diameter and 60cm long, bullet pointed at lower end).
  • Level the top surface and smoothen it with a trowel.
]]> https://www.wikitechy.com/interview-questions/civil-engineering/what-is-the-maximum-strength-of-cub-compress-strength-in-one-cub-testing/feed/ 0 What will happen if one could not properly follow the spacing of slab reinforcement bar ? https://www.wikitechy.com/interview-questions/civil-engineering/what-will-happen-if-one-could-not-properly-follow-the-spacing-of-slab-reinforcement-bar/ https://www.wikitechy.com/interview-questions/civil-engineering/what-will-happen-if-one-could-not-properly-follow-the-spacing-of-slab-reinforcement-bar/#respond Thu, 05 Aug 2021 06:32:21 +0000 https://www.wikitechy.com/interview-questions/?p=1430
  • Properly sized and located reinforcing will keep cracks reasonably tight and serviceable, if they occur, but will not prevent them. Furthermore, the great majority of reinforced concrete designs that have been reviewed for slabs on ground do not have enough reinforcing to actually increase the slab’s load-carrying capacity above that of an unreinforced slab.

spacing-of-slab-reinforcement-bar.png

]]> https://www.wikitechy.com/interview-questions/civil-engineering/what-will-happen-if-one-could-not-properly-follow-the-spacing-of-slab-reinforcement-bar/feed/ 0 IS code for grade of concrete for bamboo lintel ? https://www.wikitechy.com/interview-questions/civil-engineering/is-code-for-grade-of-concrete-for-bamboo-lintel/ https://www.wikitechy.com/interview-questions/civil-engineering/is-code-for-grade-of-concrete-for-bamboo-lintel/#respond Thu, 05 Aug 2021 06:28:11 +0000 https://www.wikitechy.com/interview-questions/?p=1429

IS code for grade of concrete for bamboo lintel ?

  • If you are using bamboo in place of steel than you can use mud in place of concrete.
  • IS Code:
    • IS: 456 – Code of observe for plain and concrete.
    • IS: 383 – Specifications for fine & coarse mixture from natural sources for concrete.
    • IS: 6909 – Specifications for SSC (super sulphated cement)
]]> https://www.wikitechy.com/interview-questions/civil-engineering/is-code-for-grade-of-concrete-for-bamboo-lintel/feed/ 0 Component parts of a weir ? https://www.wikitechy.com/interview-questions/civil-engineering/component-parts-of-a-weir/ https://www.wikitechy.com/interview-questions/civil-engineering/component-parts-of-a-weir/#respond Thu, 05 Aug 2021 06:26:22 +0000 https://www.wikitechy.com/interview-questions/?p=1428

Component parts of a weir ?

  • Body wall of the weir
  • Upstream solid apron
  • Apron on downstream side
  • Curtain walls on Upstream & Downstream
  • Talus on Upstream & Downstream
  • Shutter on the crest of weir

Body wall of the weir

  • It is a wall which is constructed to raise the water level on u/s
  • To raise water level on u/s
  • To resist water pressure
  • To resist uplift pressure

Upstream Solid Apron

  • Protect weir from erosive forces during floods
  • Length of apron depends upon discharge in river and length of weir
  • To prevent any leakage in the sub soil

Apron on Downstream Side

  • To reduce the kinetic energy of water
  • Length depends upon height of fall of water nature of soil discharge in river
  • Apron is extended up to the point where there is no scope for erosion
  • It Should have sufficient width to resist uplift pressure

Curtain walls on UpStream & DownStream

  • Upstream curtain wall
    • To reduce uplift pressure
    • Length depends on nature of sub soil
    • To increase length of the creep
    • To reduce exit gradient
  • Downstream curtain wall
    • Protect downstream flow from uplift pressure.
    • To resist kinetic energy of water increase length of creep

Shutters

  • Provide on the crest It can be raised during flood To resist water pressure
    • Protect downstream flow from uplift pressure.
    • To resist kinetic energy of water increase length of creep
]]> https://www.wikitechy.com/interview-questions/civil-engineering/component-parts-of-a-weir/feed/ 0 How to calculate lap, bond and hook length for preparing bar Bending schedule ? https://www.wikitechy.com/interview-questions/civil-engineering/how-to-calculate-lap-bond-and-hook-length-for-preparing-bar-bending-schedule/ https://www.wikitechy.com/interview-questions/civil-engineering/how-to-calculate-lap-bond-and-hook-length-for-preparing-bar-bending-schedule/#respond Thu, 05 Aug 2021 06:23:13 +0000 https://www.wikitechy.com/interview-questions/?p=1426

How to calculate lap, bond and hook length for preparing bar Bending schedule ?

  • Hook length is 5*d lap length can been given at the end L/7 and at continuous L/4.

Lap Length Intension:

  • The lap length including anchorage value of hooks shall be1. For flexural tension – Ld or 30d whichever is greater.2. For direct tension – 2Ld or 30d whichever is greater.
  • The straight length of lapping shall not be less than 15d or 20 cm

Hook Length :

  • The hook length is commonly provided for stirrups
  • Hook Length = 9D [D is Diameter of the Bar]

Overlap Length / Lap Length in Reinforcement (Bar Bending Schedule) :

BBS is termed as Calculation of Steel required for the construction of a building. We use steel to make concrete to be reinforced and for tension requirements.

Suppose the length of building is 20 m. The standard length of Rebar is 12m. We have to join two Re-bars for the total length of building. In order to Join the two bars (overlap). Overlap length is adopted.

  • Overlap Length for compression members = 40D
  • Overlap Length for tension members = 50D
  • [D is the Diameter of the bar]
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