20+ GAMMA Marine Interview Questions and Answers

Terracotta is a type of fired clay used for making decorative objects and architectural elements. The strongest bond in bricks is the covalent bond.

• Terracotta is a type of clay that is fired at high temperatures to create a hard, durable material.

• It is commonly used for making decorative objects and architectural elements such as tiles, sculptures, and facades.

• The strongest bond in bricks is the covalent bond, which is formed when two atoms share electrons to form a stable mo...read more

The range of heights of doors in a building varies depending on the purpose of the room and the building code.

• The standard height for residential doors is 6 feet 8 inches.

• Commercial buildings may have taller doors, up to 8 feet or more.

• Doors in areas with high traffic, such as hospitals or airports, may be wider and taller.

• Building codes may also dictate minimum and maximum door heights based on accessibility requirements.

Hacking is not a term used in civil engineering. The question is irrelevant.

• Hacking is not a term used in civil engineering

• The question is irrelevant and has no connection to the job position

• It is important to ask relevant questions in an interview to assess the candidate's knowledge and skills

The strength of concrete increases with time. Generally, concrete reaches about 70-80% of its strength at 7 days, 90-95% at 14 days, and achieves its full strength at 28 days.

• Concrete strength at 7 days is typically around 70-80% of its ultimate strength.

• Concrete strength at 14 days is usually around 90-95% of its ultimate strength.

• Concrete achieves its full strength at 28 days.

• The actual strength of concrete can vary depending on factors like mix design, curing conditions, a...read more

Hacking is not a term used in civil engineering. The question is irrelevant.

• Hacking is not a term used in civil engineering

• There is no relevance of hacking to the square mt area of ceiling

• The question is not applicable to the job position

Standard mould dimensions and number of moulds in 1 cubic mt of concrete.

• Standard mould dimensions for concrete cubes are 150mm x 150mm x 150mm.

• For cylindrical specimens, the standard dimensions are 150mm diameter and 300mm height.

• The number of moulds in 1 cubic mt of concrete depends on the size of the mould used.

• For 150mm x 150mm x 150mm moulds, there are approximately 67 moulds in 1 cubic mt of concrete.

• For 150mm diameter x 300mm height cylindrical moulds, there are approx...read more

Cement bags should be stored at a height of at least 15 cm above the ground.

• Cement bags should be stored on pallets or platforms to prevent moisture from the ground.

• The height should be at least 15 cm to prevent moisture from seeping into the bags.

• The storage area should be dry and well-ventilated to prevent moisture buildup.

• Stack the bags in a pyramid shape to prevent them from toppling over.

• Inspect the bags regularly for signs of damage or moisture.

• Label the bags with the d...read more

Strength of concrete increases with time. Generally, 7-day strength is around 65% of 28-day strength.

• Strength of concrete increases with time

• 7-day strength is around 65% of 28-day strength

• 14-day strength is usually between 75-85% of 28-day strength

To find the volume of trapezoidal footing, multiply the area of the trapezoidal base by the height of the footing.

• Measure the length and width of the trapezoidal base

• Calculate the area of the trapezoidal base using the formula: ((a+b)/2) x h

• Measure the height of the footing

• Multiply the area of the trapezoidal base by the height of the footing to get the volume

The thickness of the slab varies depending on the intended use and load capacity.

• The thickness of a residential slab is typically 4 inches.

• Commercial and industrial slabs can range from 6 to 12 inches thick.

• The thickness of a slab for a bridge or highway can be up to several feet thick.

• The soil type and subgrade conditions also play a role in determining slab thickness.

The volume of cement and sand in inner and outer plastering depends on various factors such as thickness, surface area, and mix ratio.

• The volume of cement and sand required for inner and outer plastering can be calculated based on the thickness of the plaster, surface area to be covered, and the mix ratio.

• The mix ratio of cement and sand varies depending on the type of plastering, such as cement plaster or lime plaster.

• The thickness of the plaster also plays a crucial role in...read more

The cement sand ratio for inner and outer plastering varies depending on the surface and location.

• The ratio for inner plastering is usually 1:3 or 1:4 (cement:sand).

• The ratio for outer plastering is usually 1:4 or 1:5 (cement:sand).

• The ratio can also vary based on the surface being plastered, such as rough or smooth surfaces.

• The location of the building can also affect the ratio, as different climates and weather conditions require different ratios for durability.

• It is import...read more

Double coat plastering is 20-25mm thick while single coat plastering is 10-15mm thick.

• Double coat plastering involves two layers of plaster while single coat involves only one.

• Double coat plastering is more durable and provides better insulation than single coat.

• Single coat plastering is quicker and cheaper to apply than double coat.

• The thickness of the plastering depends on the surface being plastered and the desired finish.

• The thickness of the plastering can also vary depen...read more

Staggered lap is a joint where two reinforcing bars are overlapped but not in the same plane.

• Staggered lap is used in reinforced concrete structures to avoid congestion of reinforcement bars.

• It is also used to distribute the load evenly across the joint.

• The overlap length should be at least 50 times the diameter of the bar.

• Staggered lap is commonly used in columns, beams, and slabs.

• It is important to ensure proper alignment and spacing of the bars during installation.

The depth of lintel beams varies depending on the load they are expected to bear.

• The depth of lintel beams is determined by the load they are expected to bear.

• The depth of lintel beams can range from 4 inches to 12 inches.

• The depth of lintel beams is usually greater than the width of the opening they span.

• The depth of lintel beams can be calculated using structural engineering formulas.

• Examples of lintel beam depths: 4 inches for a light load, 8 inches for a medium load, and ...read more

Workability is the ease with which a concrete mix can be mixed, placed, compacted and finished. OPC and PPC are types of cement used in concrete.

• Workability is affected by factors such as water-cement ratio, aggregate size and shape, and admixtures.

• OPC (Ordinary Portland Cement) is a widely used type of cement that is made by grinding clinker with gypsum.

• PPC (Portland Pozzolana Cement) is a type of cement that is made by adding pozzolanic materials such as fly ash or volcanic...read more

The depth of frog in a brick refers to the indentation on the top and bottom faces of the brick.

• The depth of frog varies depending on the type of brick and its intended use.

• It is typically between 10-20mm.

• The purpose of the frog is to provide a key for mortar and improve bonding between bricks.

• Some bricks may not have a frog at all.

• The depth of frog should be considered when calculating the number of bricks needed for a project.

The quantity of concrete an Ajax Fiori can transport depends on the model and capacity of the machine.

• Ajax Fiori offers a range of self-loading concrete mixers with varying capacities.

• The smallest model, ARGO 2000, can transport up to 2 cubic meters of concrete.

• The largest model, ARGO 4000, can transport up to 4 cubic meters of concrete.

• The quantity of concrete that can be transported also depends on factors such as the distance and terrain of the construction site.

1 cubic mt=how many cubic ft?

• 1 cubic meter is equal to 35.3147 cubic feet

• To convert cubic meters to cubic feet, multiply the cubic meter value by 35.3147

• To convert cubic feet to cubic meters, divide the cubic feet value by 35.3147

The number of sample moulds per cubic meter of concrete depends on the project specifications and quality control requirements.

• The number of sample moulds per cubic meter of concrete varies depending on the project specifications and quality control requirements.

• Typically, 3-5 sample moulds are taken per cubic meter of concrete.

• The number of sample moulds may increase if the project requires higher quality control.

• The number of sample moulds may decrease if the project has a ...read more

Efflorescence is a white powdery substance that forms on the surface of concrete or masonry.

• Occurs when water evaporates from the surface of concrete or masonry, leaving behind salt deposits

• Can be caused by a variety of factors including high humidity, water leaks, or improper curing

• Can be removed with a mild acid solution or pressure washing

• Prevention methods include proper sealing and drainage

• Commonly seen on basement walls, chimneys, and outdoor concrete surfaces

Clear cover is the distance between the reinforcement and the surface of the slab or staircase.

• Clear cover is important to protect the reinforcement from corrosion.

• The minimum clear cover for slabs and staircase is usually specified in the design codes.

• The clear cover can vary depending on the exposure conditions and the type of reinforcement used.

• Clear cover can be achieved by using spacers or chairs during construction.

• The clear cover should be checked during construction t...read more