WorksheetsEngineering Concepts Quiz: praxis
Total questions: 19
Worksheet time: 10mins
A Gantt chart is most useful for:
Representing forces in a structure
Scheduling project tasks over time
Visualizing electrical circuits
Displaying thermodynamic cycles
Which of the following best describes lean manufacturing?
Maximizing inventory to avoid stockouts
Eliminating waste and improving flow
Slowing down production to reduce errors
Outsourcing all production steps
In a robotics system, the actuator is the component that:
Senses the environment
Provides motion or force
Processes data
Communicates with other systems
Which of the following is a disadvantage of wireless communication vs wired?
Easier installation
Lower flexibility
Potential interference and lower reliability
No requirement for signal repeaters
To compute mechanical advantage of a lever:
Multiply effort by distance
Divide load distance by effort distance
Divide effort distance by load distance
Add effort and load distances
In control systems, proportional-integral-derivative (PID) controllers adjust outputs based on:
Only instantaneous error
Error, cumulative (integral) error, and rate of change of error
Only past error
Random signals
What is the main purpose of a bill of materials (BOM) in engineering?
To test materials in the lab
To list all parts, quantities, and specifications needed for assembly
To schedule worker shifts
To calculate profits
In an educational technology lab, safety interlocks are used to:
Prevent any use of machines
Automatically stop the machine under unsafe conditions
Increase machine speed
Make machines less reliable
What does reducing degrees of freedom in mechanisms help achieve?
Increase unintended motion
Restrict unintended or unstable motion
Increase complexity in design
Allow more freedom in movement
What does tolerance define in engineering design?
Maximum weight a material can bear
Allowable variation in dimension
The color of the material
Electrical conductivity of the material
What is the goal of lean manufacturing?
To increase production time
To eliminate waste and improve workflow
To increase defects for testing purposes
To reduce the number of workers
What does PWM (Pulse Width Modulation) control in electrical systems?
Voltage spikes
Duty cycle to control average power delivered
Resistance levels
Circuit temperature
What can a Hall effect sensor detect?
Temperature changes
Rotational speed via magnets passing by a sensor
Pressure variations
Electrical resistance
What are wireless systems subject to?
High voltage
Mechanical wear
Interference, signal loss, and reliability issues
Overheating
What is central to safety when working with cutting edges or bits?
Keeping distance
Wearing gloves
Using lubricants
Applying pressure
What is the formula for mechanical advantage?
Input lever arm / output lever arm
Output lever arm / input lever arm
Effort distance / load distance
Load distance / effort distance
What is a force couple?
Two forces acting in the same direction
Two equal and opposite forces whose lines of action are separated, creating pure rotation
Two forces acting perpendicular to each other
Two forces acting at an angle of 45 degrees
What does life cycle assessment evaluate?
Financial costs of a product
Environmental impacts across the product’s entire life from raw material to disposal
Manufacturing efficiency
Product design aesthetics
What do PID controllers use to improve control response?
Proportional, integral, and derivative actions
Electrical resistance
Magnetic fields
Mechanical advantage
