Identify three (3) types of steam boiler.

• Fire-Tube Boilers

• Water-Tube Boilers

• Electric Boilers

• Package Boilers

• Condensing Boilers

Fire tube boiler consist of series of straight tubes that are housed inside a water-filled outer shell. Describe four (4) advantages of fire tube boiler.

Company ABC is a manufacturing plant that operates several boilers for production processes. They have requested a routine inspection to ensure compliance of the standard in Factories and Machinery (Steam Boiler and Unfired Pressure Vessel) Regulations, 1970 after replacing one new safety valve. Describe four (4) guidelines for boiler inspection according to Malaysian practice.

Explain four (4) importance of blowdown for a boiler.

Figure 1 shows an oxygen tank of 2.5-m3 volume. The pressure gage reads 500kPa. Calculate the amount of oxygen in the tank if the temperature is 28°C and the atmospheric pressure is 93kPa.

Figure 2 shows a safety valve which compulsory to install to a boiler. Label name all parts according to boxes given.

Explain two (2) advantages of water tube boilers over fire tube boilers.

Smoke detectors play a crucial role in boiler systems by providing an early warning system for fire detection. Describe two (2) ways to maintain a smoke detector.

Describe three (3) significant advantages of using thermal oil compared to water.

A boiler running at a capacity of 3 tonnes of water shows the temperature of 93°C. Calculate pressure and volume of the boiler.