GEAS REFRESHER EXAM 1
GEAS General Engineering and Applied Sciences - It covers
engineering math, applied sciences, safety, codes, and
standards.
SI base unit of electric current Ampere (A) - It measures the flow of electric charge per
second.
SI base unit of luminous intensity Candela (cd) - It measures the perceived power of light.
Standard atmospheric pressure at sea 101.3 kPa (or 1 atm) - This is the reference for
level pressure measurements.
First Law of Thermodynamics Energy cannot be created nor destroyed, only
transformed.
Second Law of Thermodynamics It defines the direction of natural processes.
Universal gas constant R 8.314 J/mol·K - Used in the ideal gas law PV = nRT.
Specific heat of water at room ~4.18 kJ/kg·K - High specific heat makes water useful
temperature for cooling.
Efficiency of an ideal Carnot engine η = 1 - (Tc/Th) - Depends only on source and sink
temperatures.
OSHA Occupational Safety and Health Administration - US
agency ensuring workplace safety.
, GEAS REFRESHER EXAM 1
Main function of a fuse To protect against overcurrent - It melts and opens the
circuit.
Difference between a circuit breaker Breaker can be reset, fuse must be replaced - Both
and a fuse protect against overload.
Unit of luminous flux Lumen (lm) - Measures the total amount of light
emitted.
Lux unit Illuminance - Lumens per square meter.
Main purpose of grounding Safety - Provides a path for fault current to prevent
electric shock.
Power factor Cos(θ) between voltage & current - Indicates efficiency
of power usage.
Typical frequency of AC power in the 60 Hz - Standard for household and industrial power.
Philippines
Maximum safe body current threshold Around 5 mA - Above this can cause harm, >100 mA
for humans can be fatal.
Ohm's law formula V = I × R - Voltage equals current times resistance.
Purpose of a UPS (Uninterruptible Provides backup power - Protects devices during
Power Supply) blackouts or sags.
, GEAS REFRESHER EXAM 1
Hypothesis A statement or idea that attempts to explain observable
information.
Theory The idea that predicts testing results based on past
experimental data.
Significant figures in 0.00020040 5 significant figures.
Millikan Who discovered the charge of the electron
experimentally.
Bohr Who postulated that electrons revolve in orbits without
radiating energy.
Lenz's law An example of conservation of energy.
Pauli's Exclusion Principle No two electrons in an atom can have the same set of
quantum numbers.
Heisenberg's Uncertainty Principle The impossibility of knowing both the location and
velocity of a subatomic particle.
Intensive property example Density.
Distillation Technique that separates mixtures based on boiling
points.
GEAS General Engineering and Applied Sciences - It covers
engineering math, applied sciences, safety, codes, and
standards.
SI base unit of electric current Ampere (A) - It measures the flow of electric charge per
second.
SI base unit of luminous intensity Candela (cd) - It measures the perceived power of light.
Standard atmospheric pressure at sea 101.3 kPa (or 1 atm) - This is the reference for
level pressure measurements.
First Law of Thermodynamics Energy cannot be created nor destroyed, only
transformed.
Second Law of Thermodynamics It defines the direction of natural processes.
Universal gas constant R 8.314 J/mol·K - Used in the ideal gas law PV = nRT.
Specific heat of water at room ~4.18 kJ/kg·K - High specific heat makes water useful
temperature for cooling.
Efficiency of an ideal Carnot engine η = 1 - (Tc/Th) - Depends only on source and sink
temperatures.
OSHA Occupational Safety and Health Administration - US
agency ensuring workplace safety.
, GEAS REFRESHER EXAM 1
Main function of a fuse To protect against overcurrent - It melts and opens the
circuit.
Difference between a circuit breaker Breaker can be reset, fuse must be replaced - Both
and a fuse protect against overload.
Unit of luminous flux Lumen (lm) - Measures the total amount of light
emitted.
Lux unit Illuminance - Lumens per square meter.
Main purpose of grounding Safety - Provides a path for fault current to prevent
electric shock.
Power factor Cos(θ) between voltage & current - Indicates efficiency
of power usage.
Typical frequency of AC power in the 60 Hz - Standard for household and industrial power.
Philippines
Maximum safe body current threshold Around 5 mA - Above this can cause harm, >100 mA
for humans can be fatal.
Ohm's law formula V = I × R - Voltage equals current times resistance.
Purpose of a UPS (Uninterruptible Provides backup power - Protects devices during
Power Supply) blackouts or sags.
, GEAS REFRESHER EXAM 1
Hypothesis A statement or idea that attempts to explain observable
information.
Theory The idea that predicts testing results based on past
experimental data.
Significant figures in 0.00020040 5 significant figures.
Millikan Who discovered the charge of the electron
experimentally.
Bohr Who postulated that electrons revolve in orbits without
radiating energy.
Lenz's law An example of conservation of energy.
Pauli's Exclusion Principle No two electrons in an atom can have the same set of
quantum numbers.
Heisenberg's Uncertainty Principle The impossibility of knowing both the location and
velocity of a subatomic particle.
Intensive property example Density.
Distillation Technique that separates mixtures based on boiling
points.
