RECF PRE-ENGINEERING EXAM QUESTIONS WELL ANSWERED LATEST UPDATE 2026
Apollo - Answers Apollo-Apollo was the NASA program that resulted in American astronauts' making
a total of 11 spaceflights and walking on the moon. The first four flights tested the equipment used in
the Apollo Program. Six of the other seven flights landed on the moon (Apollos 11, 12, 14, 15, 16, 17).
Apollos 7 and 9 were Earth orbiting missions to test the command and Lunar Modules, and did not
return lunar data. The first Apollo flight happened in 1968.
Gear ratio calculations - Answers Input Gear/Output Gear
Steps in the engineering design process - Answers Identify Problems
Design Parameters
Research
Design/Build
Test/Redesign
Final Product
P=VI=V^2/R - Answers Formula for Power
Convert Btu to KW - Answers 1 BTU/hr=0.00029307107 kW
P(kW)=P(BTU/hr)/3412.142
Mercury - Answers Mercury-Project Mercury was the first human spaceflight program of the United
States, running from 1958 through 1963. An early highlight of the Space Race, its goal was to put a
man into Earth orbit and return him safely, ideally before the Soviet Union.
How are Bits related to Nibbles? - Answers Digital Storage
1 Bit=0.25 Nibble
4 Bits=1 Nibble
Binary Code - Answers Binary Code-a coding system using the binary digits 0 and 1 to represent a
letter, digit, or other character in a computer or other electronic device.
Atlas Rockets - Answers Atlas Rockets-Atlas V. Atlas is a family of American missiles and space launch
vehicles. The original Atlas missile was designed in the late 1950s and produced by the Convair
Division of General Dynamics, to be used as an intercontinental ballistic missile (ICBM).
Gemini - Answers Gemini-Project Gemini was NASA's second human spaceflight program. Conducted
between projects Mercury and Apollo, Gemini started in 1961 and concluded in 1966. The Gemini
spacecraft carried a two-astronaut crew.
Black, White, Yellow or Combination of Black and White or Yellow - Answers Boundaries-Labels and
containers for blood and infectious waste. (Warning labels must be fluorescent orange or orange-red
with the biosafety symbol in a contrasting color.)
Blue - Answers Information-Signs and bulletin boards. Specific railroad warnings against starting,
using or moving equipment being repaired.
Green - Answers Safety-Location of first aid equipment. Location of safety equipment, respirators,
safety showers, etc.
Fluorescent Orange, Orange-Red - Answers Bio safety-Labels and containers for blood and infectious
waste. (Warning labels must be fluorescent orange or orange-red with the biosafety symbol in a
contrasting color.)
Red - Answers Danger-Safety cans and signs.
Stop-Emergency stop bar or button on machinery. Identification of fire equipment.
Orange - Answers Warning-Parts of machinery or energized equipment that may cut, crush or
otherwise injure. Inside of transmission guards for pulleys, gears, etc.
Yellow - Answers Caution-Tripping, falling and striking hazards. "Flammable, Keep Fire Away" labels
on cabinets. Safety cans and containers for explosives, corrosives or unstable materials.
Magenta or Purple on Yellow - Answers Radiation Caution-X-ray, alpha, beta, gamma, neutron and
proton radiation.
CAD Systems - Answers CAD or (computer-aided design) and drafting (CADD), is the use of computer
technology for design and design documentation.
Thermos Laws 1 - Answers The first law, also known as Law of Conservation of Energy, states that
energy cannot be created or destroyed in an isolated system.
Thermos Laws 2 - Answers The second law of thermodynamics states that the entropy of any isolated
system always increases.
Thermos Laws 3 - Answers The third law of thermodynamics states that the entropy of a system
approaches a constant value as the temperature approaches absolute zero.
Apollo - Answers Apollo-Apollo was the NASA program that resulted in American astronauts' making
a total of 11 spaceflights and walking on the moon. The first four flights tested the equipment used in
the Apollo Program. Six of the other seven flights landed on the moon (Apollos 11, 12, 14, 15, 16, 17).
Apollos 7 and 9 were Earth orbiting missions to test the command and Lunar Modules, and did not
return lunar data. The first Apollo flight happened in 1968.
Gear ratio calculations - Answers Input Gear/Output Gear
Steps in the engineering design process - Answers Identify Problems
Design Parameters
Research
Design/Build
Test/Redesign
Final Product
P=VI=V^2/R - Answers Formula for Power
Convert Btu to KW - Answers 1 BTU/hr=0.00029307107 kW
P(kW)=P(BTU/hr)/3412.142
Mercury - Answers Mercury-Project Mercury was the first human spaceflight program of the United
States, running from 1958 through 1963. An early highlight of the Space Race, its goal was to put a
man into Earth orbit and return him safely, ideally before the Soviet Union.
How are Bits related to Nibbles? - Answers Digital Storage
1 Bit=0.25 Nibble
4 Bits=1 Nibble
Binary Code - Answers Binary Code-a coding system using the binary digits 0 and 1 to represent a
letter, digit, or other character in a computer or other electronic device.
Atlas Rockets - Answers Atlas Rockets-Atlas V. Atlas is a family of American missiles and space launch
vehicles. The original Atlas missile was designed in the late 1950s and produced by the Convair
Division of General Dynamics, to be used as an intercontinental ballistic missile (ICBM).
Gemini - Answers Gemini-Project Gemini was NASA's second human spaceflight program. Conducted
between projects Mercury and Apollo, Gemini started in 1961 and concluded in 1966. The Gemini
spacecraft carried a two-astronaut crew.
Black, White, Yellow or Combination of Black and White or Yellow - Answers Boundaries-Labels and
containers for blood and infectious waste. (Warning labels must be fluorescent orange or orange-red
with the biosafety symbol in a contrasting color.)
Blue - Answers Information-Signs and bulletin boards. Specific railroad warnings against starting,
using or moving equipment being repaired.
Green - Answers Safety-Location of first aid equipment. Location of safety equipment, respirators,
safety showers, etc.
Fluorescent Orange, Orange-Red - Answers Bio safety-Labels and containers for blood and infectious
waste. (Warning labels must be fluorescent orange or orange-red with the biosafety symbol in a
contrasting color.)
Red - Answers Danger-Safety cans and signs.
Stop-Emergency stop bar or button on machinery. Identification of fire equipment.
Orange - Answers Warning-Parts of machinery or energized equipment that may cut, crush or
otherwise injure. Inside of transmission guards for pulleys, gears, etc.
Yellow - Answers Caution-Tripping, falling and striking hazards. "Flammable, Keep Fire Away" labels
on cabinets. Safety cans and containers for explosives, corrosives or unstable materials.
Magenta or Purple on Yellow - Answers Radiation Caution-X-ray, alpha, beta, gamma, neutron and
proton radiation.
CAD Systems - Answers CAD or (computer-aided design) and drafting (CADD), is the use of computer
technology for design and design documentation.
Thermos Laws 1 - Answers The first law, also known as Law of Conservation of Energy, states that
energy cannot be created or destroyed in an isolated system.
Thermos Laws 2 - Answers The second law of thermodynamics states that the entropy of any isolated
system always increases.
Thermos Laws 3 - Answers The third law of thermodynamics states that the entropy of a system
approaches a constant value as the temperature approaches absolute zero.
