4.1

What is a common sign of a mechanical seal failure in a pump?

• Drop in motor temperature

• Vibration reduction

• Leakage at the shaft

• Low pressure at the inlet

• Increase in flow rate

Which of the following is a typical technical characteristic of a heat exchanger?

• Power supply voltage

• Heat transfer area

• Flame temperature

• Rotation speed

• Compression ratio

What kind of defect is indicated by irregular noise in a centrifugal compressor?

• Low power consumption

• Overheating of motor

• Bearing failure

• Normal operation

• Excessive lubrication

What tool is used to detect surface cracks in metallic equipment?

• Manometer

• Thermometer

• Dye penetrant test

• Pressure gauge

• Ultrasonic flowmeter

What is the first step in eliminating the cause of a process defect?

• Restarting the system

• Identifying the root cause

• Replacing all components

• Ignoring minor leaks

• Adding more pressure

What is a typical defect found in a pilot distillation unit?

• Tray corrosion

• Overcooling of product

• Flame instability

• Excess vacuum pressure

• Water ingress in fuel

What does discoloration of a tower wall during inspection most likely indicate?

• Adequate pressure

• Poor insulation

• Overheating

• Proper operation

• Moisture condensation

Which parameter is most important when choosing a distillation column?

• Size of support beams

• Number of theoretical stages

• Power supply type

• Material of bolts

• Paint color

What is a common defect in oil refining heat exchangers?

• High vacuum

• Noise reduction

• Fouling of tubes

• Uniform heat flow

• Increased conductivity

What element is essential when drafting a technical specification?

• Fuel type

• Equipment capacity

• Operator schedule

• Storage location

• Cleaning frequency