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WorksheetsTheme 1 : Ecofrontier
Total questions: 16
Worksheet time: 8mins
Which type of hydrogen is produced using renewable energy sources like wind or solar power through electrolysis?
Grey Hydrogen
Blue Hydrogen
Green Hydrogen
Black Hydrogen
Hydrogen has a lower energy density than methane.
A proton exchange membrane (PEM) allows (a) to pass through while blocking electrons.
What is the primary byproduct of complete hydrogen combustion?
Carbon Dioxide (CO₂)
Water Vapor (H₂O)
Nitrogen Oxides (NOₓ)
Carbon Monoxide (CO)
In a Proton Exchange Membrane (PEM) fuel cell, at which electrode does hydrogen gas typically enter?
Anode (negative electrode)
Cathode (positive electrode)
Electrolyte
Membrane
The pop test is a qualitative test for hydrogen. What potential safety hazard should be considered when performing this test?
The risk of producing toxic gases
The corrosive nature of the gas produced.
The possibility of electric shock.
The potential for a small explosion due to the rapid combustion of hydrogen.
The unit commonly used by electricity companies to measure the amount of electricity consumed by a household is:
Watt (W)
Ampere (A)
Kilowatt-hour (kWh)
Volt (V)
What does a 5-star rating mean for an appliance?
Faster performance
Energy-efficient and cost-saving
Higher electricity consumption
Longer warranty
A 5-star AC runs for 5 hours/day using 1 kW. What is 30 days usage for that appliance?
30 kWh
150 kWh
90 kWh
60 kWh
In Malaysia, which organization or body typically oversees and regulates the energy efficiency labeling (including star ratings) of electrical appliances?
Suruhanjaya Tenaga (Energy Commission)
Kementerian Kewangan (Ministry of Finance)
Jabatan Alam Sekitar (Department of Environment)
SIRIM (Standard and Industrial Research Institute of Malaysia)
Which of these appliances will benefit the most from a 5-star rating in terms of savings?
LED bulbs
Mobile charger
Refrigerator
Table lamp
What type of power system is connected to the main electricity grid?
(a)
Why do off-grid systems require energy storage solutions like batteries?
To increase voltage levels
To ensure power availability when renewable sources fluctuate
To store excess fossil fuel reserves
To reduce energy consumption
Which technology is most essential for converting direct current (DC) from solar panels into alternating current (AC) for household use?
Transformers
Inverters
Capacitors
Batteries
What key characteristic differentiates non-renewables energy sources from renewables?
Their ability to generate electricity efficiently
Their finite availability and depletion over time
Their reliance on modern technology
Their role in reducing global energy demand
What is the primary advantage of integrating energy-efficient appliances in both off-grid and on-grid systems?
Increased initial investment
Higher energy consumption
Lower operational costs and reduced environmental impact
Reduced electricity generation capacity
