Fichtner Consulting Engineers Engineer Trainee Interview Questions and Answers

GD&T (Geometric Dimensioning and Tolerancing) is commonly used in fixture design to ensure accurate and precise manufacturing processes.

• GD&T helps define the allowable variations in the dimensions and geometric features of a part, which is crucial in fixture design.

• Fixtures are designed to hold and position workpieces during manufacturing processes, and GD&T ensures that the fixtures are capable of achieving the requir...read more

The 321 principle is a guideline for fixture design that ensures proper alignment and stability.

• The 3 points refer to the minimum number of contact points required for stability.

• The 2 points refer to the minimum number of planes required for alignment.

• The 1 point refers to the minimum number of degrees of freedom allowed for the part being fixed.

• For example, a fixture for holding a cylindrical object may have three con...read more

General tolerances refer to the acceptable range of variation in dimensions or properties of a part or product.

• General tolerances are typically specified in engineering drawings to ensure parts fit and function properly.

• They are usually expressed as a range of acceptable values, such as +/- 0.1mm.

• Tolerances can vary depending on the specific requirements of the part or product.

• Examples of general tolerances include dim...read more

The material for wheel is typically rubber or plastic, while the material for pin is usually metal such as steel or aluminum.

• Wheel material is commonly rubber or plastic for flexibility and durability

• Pin material is usually metal like steel or aluminum for strength and stability

Hardware grades are typically classified based on material composition, strength, and corrosion resistance.

• Hardware grades are often denoted by a combination of letters and numbers, such as Grade 8.8 or Grade 316.

• Higher grade numbers generally indicate a higher tensile strength or corrosion resistance.

• Common grades for screws include Grade 2, Grade 5, and Grade 8, with Grade 8 being the strongest.

• For nuts and washers, ...read more

Motor power can be calculated using the formula: Power (W) = Torque (Nm) x Speed (RPM) / 9.548

• Calculate the torque required for the application

• Determine the speed at which the motor will operate

• Use the formula Power (W) = Torque (Nm) x Speed (RPM) / 9.548 to calculate motor power

Welds are critical in design engineering for joining metal components together.

• Welds must be strong enough to withstand the intended load and stress.

• Proper welding techniques and materials must be used to ensure the integrity of the weld.

• Inspections and testing should be conducted to verify the quality of the weld.

• Consideration should be given to factors such as joint design, welding process, and material compatibility...read more

Tool test of part drawing in software is a process to ensure accuracy and functionality of the software.

• Tool test involves checking the software's ability to read and interpret part drawings

• It ensures that the software can accurately generate tool paths based on the part drawing

• Examples of software used for tool test include SolidWorks, AutoCAD, and CATIA

The type of clamp and locator used in a checking fixture depends on the specific application and requirements.

• The clamp and locator should be chosen based on the part being checked and the desired level of accuracy.

• Common types of clamps include toggle clamps, pneumatic clamps, and hydraulic clamps.

• Locators can be pins, blocks, or other features that ensure proper positioning of the part.

• The checking fixture may also i...read more