Nagarjuna Construction Company Mechanical Maintenance Engineer Interview Questions and Answers

DOC stands for Diesel Oxidation Catalyst, a device used to reduce harmful emissions in diesel engines. Mufflers are components that reduce noise produced by the engine.

• DOC is a device used in diesel engines to convert harmful pollutants into less harmful substances.

• Mufflers are components in the exhaust system that reduce noise produced by the engine.

• DOCs are commonly used in vehicles to meet emission standards.

• Muffler...read more

Starting & presser pipe is a term used in mechanical engineering to refer to pipes used for starting and pressurizing systems.

• Starting pipe is used to supply initial fluid or gas to start a system

• Presser pipe is used to maintain pressure in a system

• Examples include starting and presser pipes in hydraulic systems or pneumatic systems

Specification of machinery refers to the detailed requirements and characteristics of a machine or equipment.

• Includes dimensions, materials, performance criteria, and safety features

• Should be clearly defined to ensure proper design and functionality

• Examples: maximum load capacity, operating temperature range, power consumption

The formula to calculate module in gears is the ratio of pitch diameter to the number of teeth.

• Module = Pitch Diameter / Number of Teeth

• Module is a measure of the size of the teeth on a gear.

• It is commonly used in gear design and manufacturing to ensure proper meshing of gears.

• For example, if a gear has a pitch diameter of 40 mm and 20 teeth, the module would be 40 mm / 20 = 2 mm.

Module is the ratio of pitch circle diameter to the number of teeth in a gear.

• Module is a gear parameter that defines the size of the gear teeth.

• Pitch circle diameter is the diameter of the imaginary circle on which the gear teeth are located.

• The formula M=D/T calculates the module where D is the pitch circle diameter and T is the number of teeth.

• For example, if the pitch circle diameter is 100 mm and the number of tee

Module in gears refers to the size of the gear teeth and is used to determine the gear ratio and dimensions of the gear.

• Module is the ratio of the pitch diameter to the number of teeth in the gear.

• It is used to calculate the dimensions of the gear teeth, such as tooth thickness and depth.

• Different gear modules are used for different applications, with larger modules for heavier loads and smaller modules for higher spee...read more

The pitch circle in gears is an imaginary circle that passes through the point where the teeth of two gears mesh together.

• The pitch circle is used to determine the gear ratio between two gears.

• It is the circle on which the pitch diameter of the gear is measured.

• The pitch circle diameter is used in calculations for gear design and analysis.

• The pitch circle is important for ensuring proper meshing of gears and smooth ope...read more

The number of pressure fire lines can vary depending on the specific requirements of the system and facility.

• The number of pressure fire lines is determined by the size and layout of the facility.

• Pressure fire lines are typically installed in areas where there is a high risk of fire, such as industrial plants or commercial buildings.

• The number of pressure fire lines may also be influenced by local fire safety regulatio...read more

HVAC requirements refer to the specifications and standards needed for heating, ventilation, and air conditioning systems in a building or facility.

• HVAC requirements include proper sizing of equipment to meet the heating and cooling needs of a space

• They also involve ensuring proper ventilation to maintain indoor air quality

• Compliance with building codes and regulations is essential for HVAC systems

• Regular maintenance a...read more

The question is unclear and does not make sense. It seems to be a typo or a mistake.

• The question may be asking about a specific type of equipment or tool, but it is not clear.

• It is important to ask for clarification or more information to provide an accurate answer.

• Without more context, it is impossible to determine what 'sprlar tipe' refers to.

A lathe is a machine tool that rotates a workpiece about an axis of rotation to perform various operations such as cutting, sanding, drilling, knurling, or deformation.

• Lathe is used to shape and cut materials such as wood, metal, and plastic.

• It rotates the workpiece on its axis and a cutting tool is applied to the workpiece to remove material.

• Lathe can perform various operations such as turning, facing, drilling, borin...read more

Boiler drum is a cylindrical container which is used to store water and steam produced in a boiler.

• It is a vital component of a boiler system.

• It is usually made of steel and is located at the top of the boiler.

• It acts as a reservoir of water/steam and helps to separate steam from water.

• It also helps to regulate the pressure and temperature of the steam.

• The level of water in the drum is maintained by a feedwater control...read more

Pressure classes are categories used to classify the pressure rating of piping components.

• Pressure classes are used to indicate the maximum allowable working pressure for piping components.

• Common pressure classes include 150, 300, 600, 900, 1500, and 2500.

• Each pressure class corresponds to a specific pressure rating in pounds per square inch (psi).

• Pressure classes are important for selecting the right components for a