Test your knowledge in Building Envelope, HVAC, Lighting, Energy Management, Building Code and Standards

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 Building Envelope

In an ECBC 2017 compliant commercial building which has 40% Window to Wall Ratio, the maximum amount of heat gain (per-square-foot) will occur through:

A

Walls

B

Windows

C

Roof

D

Floor

 

Which of the following statement is NOT correct?

A

Lower R-values means better insulation

B

Thermal mass does not equate to better insulation

C

Heat gain increases with extreme outdoor temperatures

D

Lower U-factors mean better insulation

 

From the following glass specifications, which combination shows high performance glass properties?

A

SHGC = 0.4, VLT = 0.4, U-value = 5.2 W/m2-k

B

SHGC = 0.4, VLT = 0.6, U-value = 5.2 W/m2-k

C

SHGC = 0.3, VLT = 0.4,

U-value = 2.0 W/m2-k

D

SHGC = 0.8, VLT = 0.82 U-value = 5.8 W/m2-k

 

Which of the following is NOT true with regard to “Cool Roof”?

A

Cool roof exhibits low Solar Reflectance Index (SRI)

B

Cool roof tends to emit heat at a high rate

C

Usually cool roof exhibits a high Solar Reflectance Index

D

 Cool roof is used to mitigate UHI (Urban Heat Island) effect

 

Higher the heat gain larger the capacity of cooling (air-conditioning) system. From the below list, which combination does not increase the heat gain?

A

Wall, roof, window and lighting

B

Building envelope, lighting, occupant and equipment

C

Wall, roof, window and occupant

D

Office Furniture and exterior lighting system

 

Intent to study the building size and shape is to ?

A

Optimize energy performance

B

Enhance daylighting

C

Improve ventilation

D

All of the above

 

If a building is located in a Cold Climatic Zone of India (example Shimla), select a suitable measure that can enhance building energy efficiency?

A

Low SHGC and high U-value

B

Low SHGC and low U-value

C

High SHGC and high U-value

D

High SHGC and low U-value

 

In tropical climate like India, preferred orientation for reducing heat gain in a building is:

A

East-West

B

North-South

C

Does not matter et al.

D

Provide buffer spaces in South

 

What is the relation between U-value (overall heat transfer coefficient) and R-value (thermal resistance) ?

A

U-value is reciprocal of R-value

B

U-value is proportional to R-value

C

R = L/K

D

Q = UA Delta-T

 

Select the high-performance wall option from below choices:

A

200 mm Red brick wall

B

200 mm concrete wall

C

200 mm Flay ash Brick wall

D

200 mm AAC Block wall

 

SHGC of a 3 mm clear glass is 0.87. If the SHGC of a given glass is 0.5 then what is the value of Shading Coefficient (SC)?

A

0

B

1.0

C

0.57

D

1.57

 

Which one is recommended for roof insulation in a tropical climate?

A

Over deck insulation

B

Under deck insulation

C

Sandwich insulation

D

Does not matter

 

Light Shelf helps to control the following?

A

Heat Gain

B

Light

C

Glare

D

Both Heat Gain and Glare

 

From the following properties of building material, which property relates to thermal mass?

A

Thermal conductivity (k)

B

Specific heat of material (Cp)

C

Solar reflectivity (r)

D

Emissivity (e)

 

Which one of the following is not a passive cooling strategy?

A

Wind tower and Solar chimney

B

Geothermal and earth air tunnel

C

Window shade and self-shading

D

Evaporative/ Desert cooling

 Energy Management and Building code & Standards

Which Standard defines the requirements for minimum fresh air ventilation?

A

ASHRAE 90.1

B

ASHRAE 62.1

C

ECBC 2017

D

ASHRAE 55

 

An air-conditioned room which has two lighting fixtures: an incandescent bulb of 100 W (used 10 hours/day) and LED lamp of 20 W (used for 10 hours/day), find out the lighting power installed?

A

1.2 kWh

B

120 W

C

1200 W

D

12 kWh

 

What is the minimum connected load or contract demand for a commercial building to demonstrate compliance for ECBC 2017?

A

100 kW or 120 kVA

B

1000 kW or 1200 kVA

C

100 kWh or 120 kVA

D

500 kW or 600 kVA

 

Which climatic zone is not listed in the National Building Code of India 2016:

A

Hot and Dry Climate

B

Warm and Humid

C

Temperate

D

Cold and Humid

 

Main objective of using IPMVP (International Performance Monitoring and Verification Protocol) for green buildings is to:

A

Optimise energy use

B

Verify envisaged energy performance

C

Optimise overall building performance

D

Target reduction in carbon emission

 

An office building of 100 sq m area is located in Mumbai. Annual and lighting energy Consumption are 10,000 kWh and 2,000 kWh, respectively. What is the Energy Performance Index (EPI) of the building?

A

100 kWh/sq m

B

120 kWh/sq m

C

80 kWh/sq m

D

None of the above

 

Intent of carrying out energy simulation for green buildings is ?

A

Reduce energy consumption

B

Evaluate energy performance of the building

C

Reduce equipment load

D

Reduce green house gas emission

 Lighting

A building of 1000 sq ft built-up area and lighting load is 1 kW, what is the level of LPD (Lighting Power Density) following building area method ?

A

0.001 W/sq ft

B

10 W/sq m

C

1 W/sq ft

D

1 W/ sq m

 

What are the two methods being followed for calculating the base case LPD (Lighting Power Density) as per the ASHRAE 90.1 Standard ?

A

Building Area Method & Space-by-Area Method

B

Floor Area Method & Space-by-Space Method

C

Building Area Method & Whole Building Performance Method

D

Space-by-space Method & Whole Building Performance Method

 

CFL based lighting fixtures have been replaced by LED based lighting fixtures in an office building. What is the overall effect of the renovation on energy usage?

A

Annual energy consumption would not change

B

Lighting energy consumption would reduce

C

Cooling energy consumption would decrease

D

Both lighting and cooling energy consumption would reduce

 

Which light source has the lowest Luminous Efficacy (Lumens per W)

A

CFL Light

B

LED Light

C

Incandescent bulb

D

Fluorescent Tube light

 

Lumen/watt is the unit of:

A

Light flux

B

Brightness

C

Luminous intensity

D

Luminous efficacy

 

Lumen/watt is the unit of:

A

Light flux

B

Brightness

C

Luminous intensity

D

Luminous efficacy

 

Illuminance of a surface is expressed in :

A

Radians   

B

lumens     

C

Lux     

D

LPD

 

What is the recommended lighting level (lux) for an office building to achieve visual comfort ?

A

110 – 200 lux

B

110 – 2000 lux

C

250 – 350 lux

D

More than 1000 lux

 HVAC

One ton of refrigeration is not equal to __

A

3024 kCal/hr

B

3.51 kW

C

12000 Btu/hr

D

860 kCal/hr

 

Energy performance index (EPI = kWh/square meter/year) is defined as:

A

Annual energy consumption/ Total Built-up area

B

Annual energy consumption/ Total carpet area

C

Annual energy consumption/ Site area

D

Annual energy consumption/ Total roof area

 

Energy performance index (EPI = kWh/square meter/year) is a ratio of annual building energy consumption to :

A

Total built-up area

B

Total carpet area

C

Site area

D

Roof area

 

Coefficient of Performance (COP) is a ratio of :

A

Desired cooling effect/ Work Input

B

Desired cooling effect/ Heat input

C

Cooling load/ heat Input

D

All of the above

 

Which component is not part of vapor compression (air-conditioning) system?

A

Compressor

B

Evaporator

C

Condenser

D

Pump

 

COP is defined as T1 /(T2-T1) wherein T1 represents evaporator temperature in K and T2 shows condenser temperature in K). How cop can be increased ?

A

Lower evaporator temperature and higher condenser temperature

B

Higher evaporator temperature and Lower condenser temperature

C

Higher evaporator temperature and higher condenser temperature

D

Lower evaporator temperature and Lower condenser temperature

 

The value of COP in vapour compression system is usually

A

Always less than unity

B

Always more than unity

C

Equal to unity

D

Any one of the above

 

The relation between COP and kW/TR for a refrigeration system is given by

A

kW/TR = 3.516/COP

B

kW/TR = COP /3.516

C

kW/TR = 860/COP

D

none of the above

 

The relation between COP and kW/TR for a refrigeration system is given by

A

kW/TR = 3.516/COP

B

kW/TR = COP /3.516

C

kW/TR = 860/COP

D

none of the above

 

One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg (one Ton) of ice in :

A

1 hour

B

8 hours

C

12 hours

D

24 hours

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