Science General · Physics

Energy and Electrical Devices

1,193 Questions

Energy and electrical devices focus on energy conversion, household electrical appliances, batteries, and electric vehicle technology. These principles are essential components of general science syllabi across major competitive examinations. Review these practice questions to strengthen understanding of electrical energy applications and devices.

Energy conversionHousehold electrical appliancesBatteries and cellsElectric vehicles

Energy and Electrical Devices Questions

Multiple choice

Which type of heat exchanger is commonly used for cooling the engine coolant in marine diesel engines?

  1. Shell-and-tube heat exchanger

  2. Plate-and-frame heat exchanger

  3. кожухотрубный теплообменник

  4. Spiral heat exchanger
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Shell-and-tube heat exchangers are commonly used for cooling the engine coolant in marine diesel engines. They consist of a cylindrical shell with a bundle of tubes running through it. The engine coolant flows through the tubes, while the cooling medium (such as seawater) flows through the shell.

Multiple choice

Which type of heat exchanger is commonly used for cooling the lubricating oil in marine diesel engines?

  1. Shell-and-tube heat exchanger

  2. Plate-and-frame heat exchanger

  3. кожухотрубный теплообменник

  4. Spiral heat exchanger
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Shell-and-tube heat exchangers are commonly used for cooling the lubricating oil in marine diesel engines. They consist of a cylindrical shell with a bundle of tubes running through it. The lubricating oil flows through the tubes, while the cooling medium (such as seawater) flows through the shell.

Multiple choice

Which type of heat exchanger is commonly used for cooling the lubricating oil in marine diesel engines?

  1. Shell-and-tube heat exchanger

  2. Plate-and-frame heat exchanger

  3. кожухотрубный теплообменник

  4. Spiral heat exchanger
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Shell-and-tube heat exchangers are commonly used for cooling the lubricating oil in marine diesel engines. They consist of a cylindrical shell with a bundle of tubes running through it. The lubricating oil flows through the tubes, while the cooling medium (such as seawater) flows through the shell.

Multiple choice

Which of the following is a potential application of hydrogen energy?

  1. Fuel cell vehicles

  2. Stationary power generation

  3. Industrial processes

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydrogen energy has potential applications in various sectors, including fuel cell vehicles, stationary power generation, industrial processes, and more.

Multiple choice

Which of the following is a type of fuel cell that uses hydrogen?

  1. Proton exchange membrane fuel cell (PEMFC)

  2. Solid oxide fuel cell (SOFC)

  3. Alkaline fuel cell (AFC)

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

PEMFC, SOFC, and AFC are all types of fuel cells that use hydrogen as a fuel.

Multiple choice

Which law governs the transmission and distribution of electricity in the country?

  1. The Electricity Act

  2. The Energy Regulatory Act

  3. The Grid Code

  4. The Distribution Code
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Electricity Act provides the legal framework for the transmission and distribution of electricity, including licensing, tariffs, and grid regulations.

Multiple choice

In the context of energy storage, what does the term 'cracking' refer to?

  1. Breaking down ammonia into hydrogen and nitrogen

  2. Converting hydrogen and nitrogen into ammonia

  3. Releasing energy from ammonia through combustion

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cracking is the process of decomposing ammonia into its constituent elements, hydrogen and nitrogen.

Multiple choice

How does ammonia energy storage compare to other energy storage technologies in terms of cost?

  1. More expensive than lithium-ion batteries

  2. Less expensive than lithium-ion batteries

  3. Comparable in cost to lithium-ion batteries

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ammonia energy storage is generally considered to be less expensive than lithium-ion batteries on a cost-per-unit-of-energy basis.

Multiple choice

Which of the following is a potential application of ammonia energy storage in the transportation sector?

  1. Fueling hydrogen-powered vehicles

  2. Powering electric vehicles

  3. Generating electricity for hybrid vehicles

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ammonia energy storage has potential applications in fueling hydrogen-powered vehicles, powering electric vehicles, and generating electricity for hybrid vehicles.

Multiple choice

What is the primary component of an ammonia energy storage system?

  1. Ammonia storage tank

  2. Cracker

  3. Synthesizer

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An ammonia energy storage system typically consists of an ammonia storage tank, a cracker, a synthesizer, and other вспомогательное оборудование.

Multiple choice

What is the term for the metal components that transmit power from the engine to the wheels?

  1. Chassis

  2. Body

  3. Suspension

  4. Drivetrain
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The drivetrain is the metal components that transmit power from the engine to the wheels.

Multiple choice

What type of engine is commonly used in Dish Stirling Systems?

  1. Steam turbine

  2. Gas turbine

  3. Stirling engine

  4. Internal combustion engine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Dish Stirling Systems utilize a Stirling engine, which is a type of external combustion engine that converts heat into mechanical energy.

Multiple choice

Which component of a CSP system is responsible for converting thermal energy into mechanical energy?

  1. Receiver

  2. Heliostat

  3. Stirling engine

  4. Turbine
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The turbine in a CSP system converts the thermal energy from the heat transfer fluid into mechanical energy, which is then used to generate electricity.

Multiple choice

What is the basic principle behind the operation of an Oscillating Water Column (OWC) wave energy converter?

  1. The movement of waves causes water to oscillate within a chamber, driving a turbine to generate electricity.

  2. Waves lift a floating structure, which in turn drives a generator to produce electricity.

  3. Waves push a piston back and forth, which is connected to a generator to generate electricity.

  4. Waves cause a flexible membrane to vibrate, generating electricity through piezoelectric materials.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In an OWC, the movement of waves causes water to oscillate within a chamber, which drives a turbine connected to a generator, producing electricity.

Multiple choice

Which of the following is NOT a common type of camping lantern?

  1. Gas lantern

  2. Electric lantern

  3. Battery-powered lantern

  4. Solar-powered lantern
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Electric lanterns are not commonly used for camping, as they require an electrical outlet.