RECF FUNDAMENTALS CORE EXAM SET 2026/2027
QUESTIONS AND SOLUTIONS RATED A+
✔✔In a 6'DOF manipulator, what are the degrees of freedom? - ✔✔Waist, Shoulder,
Elbow, Wrist A, Wrist B, Manipulator/Actuator
✔✔When writing in lab notebooks? - ✔✔Always use pen and number the pages
✔✔What is friction? - ✔✔An opposing force perpendicular to force normal and opposite
the direction of motion
✔✔What type of gears are spur and pinion gears? - ✔✔Parallel axle gears; used for
changing speed, torque, and rotation, and also synchronizing motion
✔✔What happens after you heat polycarbonate? - ✔✔It should remain perfectly clear,
and it may become more brittle, though that is primarily a property of acrylic
✔✔In electrical formulas, what does E mean? - ✔✔Electromotive force, the same as
Potential aka Voltage
✔✔In electrical formulas, what does I mean? - ✔✔Induction, the same as Current, aka
Amps
✔✔In electrical formulas, what does R mean? - ✔✔Resistance, the same as Ohms
✔✔In electrical formulas, what does P mean? - ✔✔Power, the same as Watts
✔✔What does the formula E = IR mean? - ✔✔Volts = Amps x Resistance
✔✔What does the formula P = IE mean? - ✔✔Watts = Amps x Volts
✔✔What is Ohm's Law? - ✔✔Amps = Volts/Ohms
✔✔What is the Power Formula? - ✔✔Watts = Volts x Amps
✔✔What is the combined formula of Ohm's Law and the Power Formula, otherwise
known as Power Formula²? - ✔✔Watts = Volts²/Ohms
✔✔In a series circuit, what is split up and what remains constant? - ✔✔Volts are split up
and amps remain constant
✔✔In a parallel circuit, what is split up and what remains constant? - ✔✔Amps are split
up and volts remain constant
, ✔✔What is the range of Celsius in relation to water? - ✔✔At 0° water freezes; at 100°
water boils
✔✔What is the range of Fahrenheit in relation to water? - ✔✔At 32° water freezes; at
212° water boils
✔✔How do you find Kelvin? - ✔✔Celsius + 273° (0° Kelvin is absolute zero)
✔✔Why is rotation of people and consumable parts done? - ✔✔To reduce and evenly
distribute wear
✔✔To find the even rotation of people or consumable parts, you should? - ✔✔Find
*how many needed x distance OR time* and then divide by the number of people or
parts you have
✔✔What is the formula for Velocity? - ✔✔Acceleration x Time
✔✔What is the formula for Distance? - ✔✔Velocity x Time
✔✔What is the formula for Force? - ✔✔Mass x Acceleration
✔✔What are the assumptions of hourly job rates? - ✔✔40 hours a week
✔✔What are the assumptions of weekly job rates? - ✔✔52 weeks a year
✔✔What are the assumptions of monthly job rates? - ✔✔12 months a year
✔✔When doing laser problems, you should consider? - ✔✔The fact that the laser
comes back, so the answer must be multiplied by two
✔✔What is the formula for Thermal Expansion? - ✔✔∆Length = Coefficient of
Expansion x ∆Temp. x Length (∆L = CoE x ∆T x L)
✔✔How do you calculate Gear Ratio using teeth? - ✔✔Output Teeth/Input Teeth
✔✔ What does the acronym STEAM stand for? - ✔✔Science, Technology, Engineering,
*Arts*, Math
✔✔What is engineering primarily about, and what characteristic is considered key to an
engineer? - ✔✔It is primarily about problem solving, and creativity is considered a key
characteristic of an engineer
QUESTIONS AND SOLUTIONS RATED A+
✔✔In a 6'DOF manipulator, what are the degrees of freedom? - ✔✔Waist, Shoulder,
Elbow, Wrist A, Wrist B, Manipulator/Actuator
✔✔When writing in lab notebooks? - ✔✔Always use pen and number the pages
✔✔What is friction? - ✔✔An opposing force perpendicular to force normal and opposite
the direction of motion
✔✔What type of gears are spur and pinion gears? - ✔✔Parallel axle gears; used for
changing speed, torque, and rotation, and also synchronizing motion
✔✔What happens after you heat polycarbonate? - ✔✔It should remain perfectly clear,
and it may become more brittle, though that is primarily a property of acrylic
✔✔In electrical formulas, what does E mean? - ✔✔Electromotive force, the same as
Potential aka Voltage
✔✔In electrical formulas, what does I mean? - ✔✔Induction, the same as Current, aka
Amps
✔✔In electrical formulas, what does R mean? - ✔✔Resistance, the same as Ohms
✔✔In electrical formulas, what does P mean? - ✔✔Power, the same as Watts
✔✔What does the formula E = IR mean? - ✔✔Volts = Amps x Resistance
✔✔What does the formula P = IE mean? - ✔✔Watts = Amps x Volts
✔✔What is Ohm's Law? - ✔✔Amps = Volts/Ohms
✔✔What is the Power Formula? - ✔✔Watts = Volts x Amps
✔✔What is the combined formula of Ohm's Law and the Power Formula, otherwise
known as Power Formula²? - ✔✔Watts = Volts²/Ohms
✔✔In a series circuit, what is split up and what remains constant? - ✔✔Volts are split up
and amps remain constant
✔✔In a parallel circuit, what is split up and what remains constant? - ✔✔Amps are split
up and volts remain constant
, ✔✔What is the range of Celsius in relation to water? - ✔✔At 0° water freezes; at 100°
water boils
✔✔What is the range of Fahrenheit in relation to water? - ✔✔At 32° water freezes; at
212° water boils
✔✔How do you find Kelvin? - ✔✔Celsius + 273° (0° Kelvin is absolute zero)
✔✔Why is rotation of people and consumable parts done? - ✔✔To reduce and evenly
distribute wear
✔✔To find the even rotation of people or consumable parts, you should? - ✔✔Find
*how many needed x distance OR time* and then divide by the number of people or
parts you have
✔✔What is the formula for Velocity? - ✔✔Acceleration x Time
✔✔What is the formula for Distance? - ✔✔Velocity x Time
✔✔What is the formula for Force? - ✔✔Mass x Acceleration
✔✔What are the assumptions of hourly job rates? - ✔✔40 hours a week
✔✔What are the assumptions of weekly job rates? - ✔✔52 weeks a year
✔✔What are the assumptions of monthly job rates? - ✔✔12 months a year
✔✔When doing laser problems, you should consider? - ✔✔The fact that the laser
comes back, so the answer must be multiplied by two
✔✔What is the formula for Thermal Expansion? - ✔✔∆Length = Coefficient of
Expansion x ∆Temp. x Length (∆L = CoE x ∆T x L)
✔✔How do you calculate Gear Ratio using teeth? - ✔✔Output Teeth/Input Teeth
✔✔ What does the acronym STEAM stand for? - ✔✔Science, Technology, Engineering,
*Arts*, Math
✔✔What is engineering primarily about, and what characteristic is considered key to an
engineer? - ✔✔It is primarily about problem solving, and creativity is considered a key
characteristic of an engineer
