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BLDG2011-Building Services (T2, 2025)

BLDG2011-Building Services (T2, 2025)

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Which of the following service uses the highest energy in the Australian residential sector?

Lighting

Water heating

Heating and cooling

Appliances

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What is the incorrect description for reverse cycle air conditioning?

Reverses cycle systems are configured to use the waste heat to heat the building during winter

Refrigeration systems provide cooling in the ‘forward cycle’ and heating in ‘reverse cycle’ simultaneously

In the ‘reverse cycle’ mode, valves within the unit automatically redirect the refrigerant to evaporate at about 0°C in the outdoor unit, and condense at about 40°C in the indoor unit

A complementary function of the cooling process based on Refrigeration Theory is Heat Rejection

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All the following statements about heating systems are correct EXCEPT:

Heating supply is dominated by various types of fuel such as natural gas, fuel oil, electricity, etc.

Heat source can be electric resistance or on-site combustion

Domestic hot water is used for both space heating and general washing in industry

Heating systems are equipment in which water is heated to produce hot water or steam for space heating or hot potable water

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All the following statements about Hot Water Boiler (HWB) are correct EXCEPT:

Overall efficiency of Water Tube Boiler is up to 75%.

Fire Tube Boiler is light in weight.

Water Tube Boiler has high maintenance cost.

Water Tube Boiler is suitable for large heating plant.

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By law, all new hot water systems are required to comply with the ............. regulations and have a tempering valve fitted to ensure the water temperature at the tap is ......°C.

Plumbing, 50

Fire protection, 60

Plumbing, 60

Fire Protection, 50

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What are the correct names of the following components of building heating system from A-D?

Heating System

Preheat coil, reheat coil, supply fan, boiler

Preheat coil, reheat coil, exhaust fan, boiler

Reheat coil, preheat coil, supply fan, boiler

Reheat coil, preheat coil, exhaust fan, boiler

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All the following statements about Domestic Hot Water (DHW) systems are correct EXCEPT:

If a central heating system is installed in the building, the capacity of the Hot Water Boiler (HWB) is normally increased for generating domestic hot water

High temperature water systems (usually above 100°C) must be pressurised and constant supervision is required by trained personnel

Plumbing regulations specify minimum temperature for the DHW

Hot water at about 90°C is commonly provided for most central heating system because the operating temperature is enough to meet the heating requirement

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All the following statements about Fan Coil Unit (FCU) systems are correct EXCEPT:

Each single set of FCU is supplied with hot water from a central Hot Water Boiler (HWB)

A FCU system can be wall-hung or ceiling-mounted

FCU system can supply conditioned air directly to the space with individual ductwork

Each single set of FCU is supplied with chilled water from a Chilled Water Set (CWS) which may be water-cooled or air-cooled

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what are the types of domestic hot water services?

Heat pump storage, Gas storage or continuous flow, Solar electric or gas boosted, Electric storage or continuous flow.

Heat pump storage, Gas storage, Solar electric or gas boosted, Electric continuous flow.

Heat pump storage, Gas storage or continuous flow, Solar electric or nuclear boosted, Electric storage or continuous flow.

Heat pump continuous flow, Gas storage, Solar electric or gas boosted, Electric storage or continuous flow.

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......system has the lowest overall upfront capital sydtem cost, and ...... has the highest spatial requirements.

Air-cooled DX single split, Water-cooled chiller FCU/AHU

Water-cooled package unit, Air-cooled chiller FCU/AHU

Water-cooled package unit, Water-cooled chiller FCU/AHU

Air-cooled DX single split, Air-cooled DX VRF

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