CA1 Engineering Disciplines Part 1

A pulley system is used to change the speed of driven parts. True or false?

• True

• False

Answer explanation

The statement is false because a pulley system primarily changes the direction of force, not the speed of driven parts. Speed changes are typically achieved through gear systems, not pulleys.

Which of the following liquid is usually used in hydraulic systems?

• Oil

• Water

• Gasoline

Answer explanation

Oil is commonly used in hydraulic systems due to its ability to transmit force efficiently and lubricate components, unlike water or gasoline, which are not suitable for this purpose.

Which of the below is a common area within mechanical engineering?

• Civil

• Welding

• Mechatronics

Answer explanation

Mechatronics is a common area within mechanical engineering, integrating mechanics, electronics, and computing. Civil engineering is a separate discipline, and while welding is relevant, it is not a distinct area like mechatronics.

AC current moves in one direction. True or false?

• True

• False

Answer explanation

AC (Alternating Current) does not move in one direction; it alternates direction periodically. Therefore, the statement is false.

Which of the following household appliance uses AC current?

• Television

• Laptop

• Mobile phone

Answer explanation

A television uses AC current to operate, as it is designed to be plugged into a wall outlet. In contrast, laptops and mobile phones typically use DC current, supplied by batteries or adapters.

Which of the below are common fields within electrical engineering?

• Structural

• Systems

• Optics

Answer explanation

In electrical engineering, 'Systems' is a common field that focuses on the design and analysis of electrical systems. 'Structural' and 'Optics' are more related to civil engineering and physics, respectively.

Electronics have been engineering discipline for hundreds of years. True or false?

• True

• False

Answer explanation

The statement is false because electronics as an engineering discipline is relatively modern, emerging in the 20th century, not hundreds of years ago.

Which of the following is a category for integrated circuits?

• Analog

• Digital

• Mixed-signal

• All of the above

Answer explanation

Integrated circuits can be categorized into analog, digital, and mixed-signal ICs. Each category serves different functions in electronic devices, with digital ICs being widely used in computing applications.

Which of the below is a common material used in PCB's?

• Rubber

• Silicon

• Copper

Answer explanation

Copper is a common material used in PCBs due to its excellent electrical conductivity, making it ideal for connecting components. Rubber and silicon are not typically used for the conductive pathways in PCBs.