Marine Electricals Purchase Trainee Interview Questions and Answers

Open loop does not have feedback mechanism, while closed loop does.

• Open loop system does not have a feedback mechanism to adjust the output based on the input.

• Closed loop system uses feedback from the output to control the input and maintain desired output.

• Open loop systems are simpler and less accurate, while closed loop systems are more complex but more accurate.

• Example: A toaster is an open loop system as it does no...read more

The equation of a PID controller is a control loop feedback mechanism used in industrial control systems.

• The equation for a PID controller is: u(t) = Kp*e(t) + Ki*∫e(t)dt + Kd*de(t)/dt

• Kp, Ki, and Kd are the proportional, integral, and derivative gains respectively

• The proportional term Kp reacts to the current error value

• The integral term Ki reacts to the accumulation of past errors

• The derivative term Kd reacts to the r

Two common pressure sensors are piezoresistive sensors and capacitive sensors.

• Piezoresistive sensors: measure pressure by changes in electrical resistance

• Capacitive sensors: measure pressure by changes in capacitance

Open loop does not have feedback mechanism, while closed loop does.

• Open loop system does not have a feedback mechanism to adjust the output based on the input.

• Closed loop system uses feedback from the output to adjust the input and maintain desired output.

• Examples of open loop systems include a toaster or a washing machine with a timer setting.

• Examples of closed loop systems include a thermostat controlling room temper

Commonly used automation protocols include Modbus, Profibus, Ethernet/IP, and DeviceNet.

• Modbus is a serial communication protocol commonly used in industrial automation.

• Profibus is a fieldbus communication protocol used in process automation.

• Ethernet/IP is a protocol used for industrial automation networking.

• DeviceNet is a communication protocol used in factory automation for connecting industrial devices.

I overcome problems by analyzing the situation, seeking advice, and taking action.

• I analyze the situation to identify the root cause of the problem

• I seek advice from colleagues or experts in the field

• I take action by developing a plan and implementing solutions

• I remain flexible and adaptable to adjust my approach as needed

• For example, when faced with a project delay, I analyzed the cause, sought advice from my team, an...read more

SS 304 and SS 316 are both austenitic stainless steels, but with different compositions and properties.

• SS 304 contains 18% chromium and 8% nickel, while SS 316 contains 16% chromium, 10% nickel, and 2% molybdenum.

• SS 316 is more corrosion-resistant than SS 304, especially in chloride environments.

• SS 316 is more expensive than SS 304.

• SS 304 is commonly used in food processing equipment, while SS 316 is used in marine and

Dimensional standards for flanges and pipe fittings

• Flanges and fittings are manufactured according to various dimensional standards such as ASME, DIN, JIS, etc.

• These standards specify the dimensions, tolerances, and materials for flanges and fittings.

• For example, ASME B16.5 is a widely used standard for flanges in the United States.

• It is important to select the correct standard for the application to ensure proper fit ...read more