Podcast
Questions and Answers
Which of the following is a major natural resource used in renewable energy?
Which of the following is a major natural resource used in renewable energy?
- Solar power (correct)
- Natural gas
- Oil
- Coal
Which type of batteries are environmentally friendly because they are made from non-toxic metals?
Which type of batteries are environmentally friendly because they are made from non-toxic metals?
- NiMH batteries (correct)
- Lead-acid batteries
- Alkaline batteries
- NiCd batteries
Which country has invested heavily in wind power technology?
Which country has invested heavily in wind power technology?
- Singapore
- China
- Germany (correct)
- India
What is the purpose of earthing in electrical installations?
What is the purpose of earthing in electrical installations?
Which type of current flows in only one direction and has a constant value?
Which type of current flows in only one direction and has a constant value?
What is the function of a cell in an electric circuit?
What is the function of a cell in an electric circuit?
Which of the following is the symbol for a cell?
Which of the following is the symbol for a cell?
What is the difference between a cell and a battery?
What is the difference between a cell and a battery?
Which material is commonly used as insulation for heating elements?
Which material is commonly used as insulation for heating elements?
What is the purpose of sheathing in a cable?
What is the purpose of sheathing in a cable?
What is the function of stranding in a cable?
What is the function of stranding in a cable?
How is the size of a cable specified?
How is the size of a cable specified?
Which material is commonly used for making cables?
Which material is commonly used for making cables?
What is the function of an insulator in a cable?
What is the function of an insulator in a cable?
What is the main difference between a rewirable fuse and a cartridge fuse?
What is the main difference between a rewirable fuse and a cartridge fuse?
What is the purpose of a high-rupturing capacity (HRC) fuse?
What is the purpose of a high-rupturing capacity (HRC) fuse?
Which type of power supply is commonly used in Singapore to distribute electricity directly to higher-powered equipment?
Which type of power supply is commonly used in Singapore to distribute electricity directly to higher-powered equipment?
Which type of battery is rechargeable and has a higher energy density and longer shelf-life compared to zinc-carbon batteries?
Which type of battery is rechargeable and has a higher energy density and longer shelf-life compared to zinc-carbon batteries?
Which type of battery has electrodes made of lead dioxide and sponge metallic lead, with a sulphuric acid solution as an electrolyte?
Which type of battery has electrodes made of lead dioxide and sponge metallic lead, with a sulphuric acid solution as an electrolyte?
Which type of battery has a nominal voltage of 3.6 V and is commonly used in digital cameras, watches, and other types of portable electronics?
Which type of battery has a nominal voltage of 3.6 V and is commonly used in digital cameras, watches, and other types of portable electronics?
Which of the following is true about using a multimeter to measure resistance?
Which of the following is true about using a multimeter to measure resistance?
Before taking a reading with a continuity tester, what should be ensured?
Before taking a reading with a continuity tester, what should be ensured?
What does a socket-outlet polarity tester indicate?
What does a socket-outlet polarity tester indicate?
What type of electrical quantities can a multimeter measure?
What type of electrical quantities can a multimeter measure?
What does it mean when a multimeter is set to measure resistance?
What does it mean when a multimeter is set to measure resistance?
What should be done with the leads of a multimeter when setting it to infinity (∞)?
What should be done with the leads of a multimeter when setting it to infinity (∞)?
Which type of protective device is used to protect against overcurrent in a circuit?
Which type of protective device is used to protect against overcurrent in a circuit?
What is the purpose of a fuse in an electrical circuit?
What is the purpose of a fuse in an electrical circuit?
What is the main difference between a rewirable fuse and a cartridge fuse?
What is the main difference between a rewirable fuse and a cartridge fuse?
What is the function of a residual current circuit breaker (RCCB) in an electrical circuit?
What is the function of a residual current circuit breaker (RCCB) in an electrical circuit?
Which type of fault occurs when the live (phase) terminal touches the exposed metallic part, causing the metallic part to become live and potentially leading to an electric shock?
Which type of fault occurs when the live (phase) terminal touches the exposed metallic part, causing the metallic part to become live and potentially leading to an electric shock?
What is the purpose of a residual current circuit breaker (RCCB) in an electrical installation?
What is the purpose of a residual current circuit breaker (RCCB) in an electrical installation?
What is the main difference between an overload current and a fault current?
What is the main difference between an overload current and a fault current?
What is the purpose of a fuse in a circuit?
What is the purpose of a fuse in a circuit?
