Dentcare Dental Lab Mechanical Engg. Design Interview Questions and Answers

The pH of acids is less than 7, while the pH of bases is greater than 7.

• Acids have a pH value less than 7.

• Bases have a pH value greater than 7.

• Neutral substances have a pH value of 7.

• pH scale ranges from 0 to 14.

• Examples of acids: lemon juice, vinegar.

• Examples of bases: baking soda, soap.

A Vernier caliper is a measuring instrument used to measure the dimensions of objects with high accuracy.

• It consists of a main scale and a sliding vernier scale.

• The main scale is fixed and provides the primary measurement.

• The vernier scale slides along the main scale and provides the fractional measurement.

• It is commonly used in engineering, manufacturing, and scientific fields.

• It can measure internal and external dime...read more

Speed can be controlled by adjusting the pressure of the fluid or gas that powers the system.

• Pressure can be increased or decreased to control the speed of a system.

• This is commonly used in hydraulic and pneumatic systems.

• For example, in a hydraulic system, increasing the pressure of the fluid can increase the speed of a cylinder.

• Similarly, in a pneumatic system, increasing the pressure of the gas can increase the spee...read more

Hydraulic refers to the use of fluids to transmit power or energy.

• Hydraulic systems use liquids such as oil or water to transmit power.

• Examples include hydraulic brakes in cars and hydraulic lifts in buildings.

• Failure can occur due to leaks, blockages, or mechanical issues.

• Regular maintenance and inspection can prevent failure and ensure proper functioning.

PLC stands for Programmable Logic Controller. It is a digital computer used for automation of electromechanical processes.

• PLC is used to control and monitor industrial processes.

• It is programmed using ladder logic or other programming languages.

• PLC can be used for various applications such as controlling traffic lights, assembly lines, and HVAC systems.

• It can communicate with other devices and systems through various c...read more