10+ Senior Mechanical Technician Interview Questions and Answers

Centrifugal pumps are widely used in oil and gas for fluid transfer, relying on rotational energy to move liquids.

• Centrifugal pumps use a rotating impeller to increase fluid velocity and pressure.

• Commonly used in oil and gas for transferring crude oil, water, and chemicals.

• They operate based on the principle of converting kinetic energy into hydraulic energy.

• Hydro testing involves filling the system with water and pressurizing it to check for leaks and structural integrity.

• Ex...read more

Speed conversion calculation in belt drive from driver to driven.

• Determine the speed ratio between the driver and driven pulleys

• Use the formula: Speed of driven pulley = Speed of driver pulley x (diameter of driver pulley / diameter of driven pulley)

• Ensure that the units of measurement are consistent

• Consider the effect of slip in the belt drive system

A screw pump uses a rotating screw to move fluids, providing efficient and continuous flow with low shear rates.

• Consists of a helical screw rotating within a cylindrical casing.

• Ideal for viscous fluids, such as oils and slurries.

• Commonly used in applications like oil extraction and wastewater treatment.

• Requires regular maintenance to check for wear on the screw and casing.

• Seals and bearings should be inspected periodically to prevent leaks.

Electrodes differ in their composition, shape, and purpose.

• Electrodes can be made of different materials such as tungsten, graphite, and copper.

• They can have different shapes such as cylindrical, conical, and spherical.

• Electrodes are used for different purposes such as welding, cutting, and electrochemical machining.

The Other Gas in Earth is approximately 0.934% of the atmosphere.

• Other Gas in Earth refers to gases other than nitrogen (78%) and oxygen (21%) in the atmosphere

• Common gases in the Other Gas category include argon, carbon dioxide, neon, helium, and methane

• These gases play important roles in maintaining Earth's atmosphere and climate

Journal bearing clearance can be checked using a feeler gauge or a dial indicator.

• Use a feeler gauge to measure the gap between the journal and the bearing surface.

• Alternatively, use a dial indicator to measure the radial movement of the journal within the bearing.

• Ensure the journal is clean and free of debris before taking measurements.

• Compare the measured clearance to the manufacturer's specifications for acceptable tolerances.

Oxygen makes up about 21% of Earth's atmosphere.

• Oxygen makes up approximately 21% of Earth's atmosphere

• The majority of the remaining atmosphere is composed of nitrogen

• Oxygen is essential for respiration and combustion processes on Earth

Bearings are used to reduce friction between two moving parts. There are several types of bearings.

• Plain bearings: sliding contact between two surfaces

• Rolling element bearings: balls or rollers between two surfaces

• Jewel bearings: used in watches and clocks

• Fluid bearings: use a fluid to reduce friction

• Magnetic bearings: use magnetic fields to levitate the shaft

• Tapered roller bearings: used in automotive and industrial applications

• Thrust bearings: used to support axial loads

• Sph...read more

Preventive maintenance is a proactive approach to maintenance that involves regularly scheduled inspections, repairs, and replacements to prevent equipment failure.

• Preventive maintenance involves regularly scheduled inspections, repairs, and replacements to prevent equipment failure.

• It is a proactive approach to maintenance that aims to identify and fix potential problems before they become major issues.

• Preventive maintenance can include tasks such as lubrication, cleaning, a...read more

The three elements needed for a fire to occur are fuel, oxygen, and heat.

• Fuel: Any combustible material such as wood, paper, gasoline, or natural gas

• Oxygen: A sufficient amount of oxygen in the air to support combustion

• Heat: A heat source to raise the temperature of the fuel to its ignition point

Mean line of fire is the path that a projectile or bullet takes when fired from a weapon.

• Mean line of fire is the trajectory that a projectile follows when fired from a gun or weapon.

• It is important to understand the mean line of fire to ensure accuracy and safety when using firearms.

• Factors such as distance, wind speed, and angle of elevation can affect the mean line of fire.

• For example, a sniper must calculate the mean line of fire to accurately hit a target from a long dis...read more

There are various types of hydraulic pumps used in mechanical systems.

• Different types of hydraulic pumps include gear pumps, vane pumps, and piston pumps.

• Gear pumps are simple and cost-effective, but have lower efficiency.

• Vane pumps are more efficient and provide higher pressure, but are more complex.

• Piston pumps are highly efficient and can handle high pressures, but are more expensive.

• The choice of hydraulic pump depends on the specific application and system requirements.

The question is unclear and requires clarification.

• Request clarification on what is meant by 'type gear teeth'.

• Ask for more information or context to provide an accurate answer.

• Without further details, it is not possible to answer the question.

FATS information is an acronym for Fluids, Air, Temperature, and Steam, which are crucial elements in mechanical systems.

• Fluids: Knowledge of different types of fluids used in mechanical systems, such as hydraulic fluids and lubricants.

• Air: Understanding of air flow and pressure in mechanical systems, including pneumatic systems.

• Temperature: Ability to monitor and control temperature levels in mechanical equipment to prevent overheating or freezing.

• Steam: Familiarity with ste...read more