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Browse complete papersWhat is the primary purpose of a green building rating system like LEED (Leadership in Energy and Environmental Design)?
To reduce construction costs
To improve building aesthetics
To reduce environmental impact
To increase energy consumption
Correct answer
To reduce construction costs
The standard oxygen demand (BOD) of water can be determined by measuring which parameter?
The amount of dissolved oxygen consumed by bacteria
The amount of total suspended solids
The concentration of nitrogen compounds
The turbidity of water
Correct answer
The amount of dissolved oxygen consumed by bacteria
In municipal solid waste management, which of the following is the most efficient method for reducing volume and weight?
Incineration
Composting
Recycling
Landfilling
Correct answer
Incineration
A wastewater treatment plant treats \(50,000 m^{3}/day\) of water. If the BOD of incoming water is \(300 mg/L\) and the effluent BOD is \(20 mg/L\), calculate the BOD load removed per day.
10,000 kg
14,000 kg
15,000 kg
20,000 kg
Correct answer
10,000 kg
What is the primary concern when trains move at different speeds on the same track?
The track will be unable to accommodate all types of trains
The actual cant to be provided must be chosen based on the speed of the trains
The passengers will not be able to feel the centrifugal force
Maintenance of the track becomes easier
Correct answer
The track will be unable to accommodate all types of trains
Which gauge is used in areas with inadequate funds and lower revenue prospects?
Broad Gauge
Metre Gauge
Narrow Gauge
Ultra Wide Gauge
Correct answer
Broad Gauge
What is the ideal water-cement ratio for maximum strength in concrete?
Correct answer
Negative slip in reciprocating pump occurs when:
Actual discharge is less than theoretical
Suction head is zero
Actual discharge is more than theoretical
Pump is running at high speed
Correct answer
Actual discharge is less than theoretical
For a Pelton wheel, the jet is deflected by the bucket through an angle of:
\(60^{\circ}\) to \(90^{\circ}\)
\(90^{\circ}\) to \(120^{\circ}\)
\(160^{\circ}\) to \(170^{\circ}\)
\(120^{\circ}\) to \(135^{\circ}\)
Correct answer
\(60^{\circ}\) to \(90^{\circ}\)
In a multistage pump, the impellers are arranged to:
Increase velocity
Increase head
Reduce slip
Decrease discharge
Correct answer
Increase velocity