J. Kumar Infraprojects Senior Engineer Plant and Machinery Interview Questions and Answers

General knowlegde, Basic Aptitude, Domain Technical MCQ

Genx vs Genz, Altitude and comparsion

Q1. Components of Transformer
Ans. 
Components of a transformer include core, windings, and insulation.
• Core: Provides a path for magnetic flux

• Windings: Primary and secondary coils for inducing voltage

• Insulation: Prevents short circuits and ensures safety
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Q2. Question based on series and parallel resistance
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C6h12o6 what's this is

Q1. Root 3 what is this
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Q2. 66 conversation for Roman number
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Q1. Auxin what is theis
Ans. 
Auxin is a plant hormone that regulates growth and development.
• Auxin is responsible for cell elongation and division in plants.

• It plays a role in phototropism, gravitropism, and apical dominance.

• Examples of auxin include indole-3-acetic acid (IAA) and synthetic auxins like 2,4-D.
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Q2. Iaa what is this
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Q1. Brief in QMS why it is adopted
Ans. 
QMS is adopted to ensure consistent quality, meet customer requirements, and improve processes.
• Ensures consistent quality of products or services

• Helps meet customer requirements and expectations

• Improves processes and efficiency

• Reduces risks and errors

• Enhances customer satisfaction

• Provides a framework for continuous improvement
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Q2. Design mix procedure
Ans. 
Design mix procedure involves determining the proportions of materials to create a concrete mix with desired properties.
• Identify the required strength and durability of the concrete

• Select suitable materials such as cement, aggregates, and water

• Calculate the proportions of each material based on mix design methods

• Test the mix to ensure it meets specifications

• Adjust the mix if necessary to achieve desired properties
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Q1. Errection of 11 kv line and detail about material in 1 km line?
Ans. 
The erection of an 11 kV line involves setting up a power line infrastructure for transmitting electricity over a distance of 1 km.
• Materials required include conductors (such as aluminum or copper), insulators, poles, transformers, and hardware fittings.

• The conductors are used to carry the electricity from one point to another, while insulators prevent the flow of electricity to the ground.

• Poles are used to support the...read more
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Q1. Privious salay?
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Q1. Grade of concrete
Ans. 
Grade of concrete refers to its strength and durability.
• Grade of concrete is determined by its compressive strength.

• It is denoted by a number followed by 'M' (e.g. M20, M25).

• Higher grade concrete has higher strength and durability.

• Different grades of concrete are used for different purposes.

• For example, M20 grade is commonly used for residential construction.
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Q2. Mix design of concrete
Ans. 
Mix design of concrete involves determining the proportions of ingredients to achieve desired properties.
• Mix design is the process of determining the proportions of cement, water, aggregates, and admixtures in concrete.

• It involves considering factors such as strength, workability, durability, and economy.

• Various methods like the ACI method, British method, and DOE method can be used for mix design.

• The mix design proces...read more
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Q1. Status of my life style
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Q2. My behaviour and other
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Q1. What are doing in metro project
Ans. 
I am responsible for ensuring quality control and quality assurance in the construction of the metro project.
• Conducting inspections and tests on materials used in construction

• Ensuring compliance with project specifications and standards

• Identifying and resolving any quality issues that may arise

• Collaborating with project managers and contractors to maintain quality standards
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Q2. You know about pre casting
Ans. 
Pre casting is a construction method where concrete elements are cast in a different location before being transported to the construction site.
• Pre casting helps in ensuring quality control and reducing construction time on site.

• Examples include precast concrete panels, beams, and columns.

• It allows for better planning and coordination of construction activities.
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Normal introduction and interview

Q1. Type of electrical motor
Ans. 
There are various types of electrical motors including AC motors, DC motors, synchronous motors, and induction motors.
• AC motors: commonly used in household appliances and industrial applications

• DC motors: used in applications where speed control is important, such as in electric vehicles

• Synchronous motors: used in applications where precise speed control is required, such as in clocks and timers

• Induction motors: widely...read more
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Q2. 3 phase induction motor starter
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Q3. Protection of transformer
Ans. 
Protection of transformer involves measures to prevent damage from overcurrent, overvoltage, and overheating.
• Use overcurrent protection devices such as fuses and circuit breakers to prevent damage from excessive current flow.

• Install overvoltage protection devices like surge arresters to safeguard against voltage spikes.

• Implement temperature monitoring systems to prevent overheating, such as thermal sensors and cooling ...read more
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Q4. ACB VCB maintenance
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Q5. Star delta connection
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