10+ Trident Group Interview Questions and Answers

When a crane is starting work for lifting, the following checks should be performed.

• Check the condition of the crane, including any visible damages or defects.

• Inspect the lifting equipment, such as slings, hooks, and chains, for any signs of wear or damage.

• Verify that the load to be lifted is within the crane's capacity and properly secured.

• Ensure that the area around the crane is clear of any obstacles or personnel.

• Confirm that all safety devices and alarms on the crane are ...read more

As a Safety Supervisor, I check various aspects of scaffolding to ensure safety.

• I check the stability of the scaffolding structure to ensure it is properly erected and secured.

• I inspect the scaffolding components, such as planks, braces, and guardrails, for any damage or defects.

• I verify that the scaffolding is properly assembled and meets the required standards and regulations.

• I assess the load capacity of the scaffolding to ensure it can support the intended weight.

• I inspec...read more

The question is unclear and lacks context.

• The question needs to be rephrased or clarified.

• It is unclear what 'presr' refers to.

• More information is needed to provide an accurate answer.

Types of valves include ball valves, gate valves, globe valves, butterfly valves, and check valves.

• Ball valves: used for on/off control without pressure drop

• Gate valves: used for full flow or no flow applications

• Globe valves: used for regulating flow in pipelines

• Butterfly valves: used for throttling flow

• Check valves: used to prevent backflow

I will draw an isometric drawing of a simple cube.

• Start by drawing a square as the base of the cube

• Draw lines extending from the corners of the square at a 45 degree angle

• Connect the lines to form the sides of the cube

• Add shading to give the drawing a 3D effect

ASTM A312 is the code for SS pipe used in oil and gas projects

• ASTM A312 is the standard specification for seamless, welded, and heavily cold worked austenitic stainless steel pipes

• It covers grades such as TP304, TP316, TP321, etc.

• These pipes are commonly used in oil and gas projects for their corrosion resistance and high temperature strength

There are several types of valves used in mechanical systems for controlling the flow of fluids or gases.

• Gate valves

• Ball valves

• Butterfly valves

• Check valves

• Globe valves

• Needle valves

Pipe types include steel, copper, PVC, PEX, and galvanized.

• Steel pipes are commonly used for high-pressure applications.

• Copper pipes are durable and resistant to corrosion.

• PVC pipes are lightweight and easy to install.

• PEX pipes are flexible and suitable for hot and cold water systems.

• Galvanized pipes are coated with zinc to prevent rusting.

NGR is a Neutral Grounding Resistor used in electrical substations to limit the fault current.

• NGR limits the fault current in electrical substations.

• It is used to protect the equipment from damage during a fault.

• NGR is connected between the neutral point of the transformer and ground.

• It is designed to have a high resistance value to limit the current flow.

• NGR is an important component in the electrical system and its proper functioning is crucial for safety.

• NGR is also used i...read more

Batteries are used in oil & gas industry for backup power and emergency shutdown systems.

• Batteries provide backup power to critical equipment in case of power outages.

• They are used in emergency shutdown systems to ensure safe shutdown of equipment in case of emergencies.

• Batteries are also used in remote locations where power supply is not available.

• Examples of batteries used in oil & gas industry include lead-acid batteries, lithium-ion batteries, and nickel-cadmium batteries...read more

A single line diagram is a simplified representation of an electrical power system.

• A single line diagram shows the main components of the system and their interconnections.

• It is used to visualize the flow of power and to identify potential problems.

• The diagram typically includes generators, transformers, switchgear, and loads.

• Each component is represented by a symbol and labeled with its rating and other important information.

• Lines connecting the symbols indicate the flow of ...read more