Punj Lloyd Senior Mechanic Interview Questions and Answers

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

Blinding is a technique used in research studies to prevent bias by keeping participants or researchers unaware of certain information.

• Blinding can be single-blind (participants are unaware) or double-blind (both participants and researchers are unaware)

• Blinding helps to reduce bias and ensure the validity of study results

• Example: In a drug trial, participants may be given either the actual drug or a placebo without kn

Permits are legal documents that allow individuals or companies to perform certain activities or projects within a specified timeframe and under specific conditions.

• Permits are required for various activities such as construction, demolition, renovation, and environmental impact assessments.

• They ensure that the work being done complies with local regulations and safety standards.

• Permits may be issued by government agen...read more

Maintenance procedures for heat exchangers involve regular cleaning, inspection, and testing to ensure optimal performance.

• Regularly clean the heat exchanger tubes to remove any buildup of debris or scale

• Inspect the heat exchanger for leaks, corrosion, or other signs of damage

• Test the heat exchanger for efficiency and performance using pressure tests or thermal imaging

• Replace any worn out or damaged parts to prevent fu...read more

Gaskets are mechanical seals used to prevent leakage between two surfaces.

• Types: Spiral Wound, Ring Joint, Camprofile, Double Jacketed, Kammprofile, Rubber, Cork, Metal Jacketed, Non-Asbestos

• Materials: Rubber, Cork, Metal, Non-Asbestos, PTFE, Graphite, Silicone, Neoprene

• Used in various industries like automotive, aerospace, oil & gas, plumbing, etc.

Gpm for water supply pump can be calculated by dividing the flow rate in gallons by the time in minutes.

• Calculate the flow rate in gallons per minute (GPM)

• Determine the time in minutes over which the flow rate is measured

• Divide the flow rate by the time to get the GPM value

Heat exchangers are devices used to transfer heat between two or more fluids, ensuring efficient heat transfer and temperature control.

• Transfer heat between fluids

• Maintain temperature control

• Increase energy efficiency

• Commonly used in HVAC systems, refrigeration units, and chemical processing plants