In an Uninterruptible Power Supply (UPS) system, the power storage device is primarily responsible for providing power during a mains failure. Which of the following power storage technologies can offer high energy density and fast charging, suitable for high-performance UPS applications?

When designing a power transmission system, how does the gear ratio affect the speed and torque of the output shaft?

In a fluid power system, how does the Reynolds number influence flow conditions?

In an oscilloscope, why would you use a ‘delayed sweep’ setting?

In the context of rotating machinery maintenance, which of the following statements best describes the concept of ‘Critical Speed’?

In a hydraulic system, what does the term ‘bulk modulus’ refer to?

In a system where a Programmable Logic Controller (PLC) is used, there’s a requirement to store a sequence of states in the control process. Which of the following PLC programming languages would be most suitable for this task?

In a refrigeration system, why might an oil separator be used in conjunction with a compressor?