CWEA ELECTRICAL &
INSTRUMENTATION TECHNOLOGIST
GRADE 1 EXAMINATION
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Section 1: Physical Sciences (Questions 1-40)
1. What is the chemical symbol for Gold?
A) Go
B) Gd
C) Au
D) Ag
Correct Answer: C) Au
Rationale: Au is derived from the Latin word for gold, 'Aurum'. Ag is silver.
2. Which planet is known as the "Red Planet"?
A) Venus
B) Jupiter
C) Mercury
D) Mars
Correct Answer: D) Mars
Rationale: Mars appears reddish due to iron oxide (rust) on its surface. Venus
is the hottest planet, Jupiter is the largest, and Mercury is closest to the sun.
,3. What is the hardest known natural material?
A) Gold
B) Iron
C) Diamond
D) Platinum
Correct Answer: C) Diamond
Rationale: Diamond is an allotrope of carbon with a very strong tetrahedral
structure, making it the hardest natural material.
4. What is the chemical formula for water?
A) H2O
B) CO2
C) NaCl
D) HCl
Correct Answer: A) H2O
Rationale: A water molecule consists of two hydrogen atoms and one oxygen
atom. CO2 is carbon dioxide, NaCl is salt, and HCl is hydrochloric acid.
5. What is the boiling point of water at standard atmospheric pressure?
A) 100°C
B) 212°F
C) Both A and B
D) 0°C
Correct Answer: C) Both A and B
,Rationale: 100°C and 212°F are equivalent temperatures, both being the
boiling point of water at sea level (standard atmospheric pressure). 0°C is the
freezing point.
6. Which part of the atom has a positive charge?
A) Electron
B) Neutron
C) Proton
D) Nucleus
Correct Answer: C) Proton
Rationale: Protons are positively charged subatomic particles found in the
nucleus. Electrons are negative, and neutrons have no charge.
7. What is the process by which plants make their own food?
A) Respiration
B) Photosynthesis
C) Fermentation
D) Transpiration
Correct Answer: B) Photosynthesis
Rationale: Plants use sunlight, water, and carbon dioxide to create glucose
(their food) and oxygen in the process of photosynthesis.
8. What type of bond involves the sharing of electron pairs between atoms?
A) Ionic Bond
B) Metallic Bond
C) Covalent Bond
, D) Hydrogen Bond
Correct Answer: C) Covalent Bond
Rationale: Covalent bonding occurs when atoms share electrons to achieve a
stable electron configuration. Ionic bonds involve the transfer of electrons.
9. Which of the following is a noble gas?
A) Oxygen
B) Chlorine
C) Helium
D) Nitrogen
Correct Answer: C) Helium
Rationale: Helium is in Group 18 of the periodic table and is characterized by
its lack of reactivity. Oxygen, chlorine, and nitrogen are reactive.
10. What is the speed of light approximately?
A) 300,000 km/s
B) 300,000 m/s
C) 3,000 km/s
D) 30,000 km/s
Correct Answer: A) 300,000 km/s
Rationale: The speed of light in a vacuum is approximately 299,792 kilometers
per second, often rounded to 300,000 km/s.
11. What is the main component of the Earth's atmosphere?
A) Oxygen
B) Carbon Dioxide
INSTRUMENTATION TECHNOLOGIST
GRADE 1 EXAMINATION
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Section 1: Physical Sciences (Questions 1-40)
1. What is the chemical symbol for Gold?
A) Go
B) Gd
C) Au
D) Ag
Correct Answer: C) Au
Rationale: Au is derived from the Latin word for gold, 'Aurum'. Ag is silver.
2. Which planet is known as the "Red Planet"?
A) Venus
B) Jupiter
C) Mercury
D) Mars
Correct Answer: D) Mars
Rationale: Mars appears reddish due to iron oxide (rust) on its surface. Venus
is the hottest planet, Jupiter is the largest, and Mercury is closest to the sun.
,3. What is the hardest known natural material?
A) Gold
B) Iron
C) Diamond
D) Platinum
Correct Answer: C) Diamond
Rationale: Diamond is an allotrope of carbon with a very strong tetrahedral
structure, making it the hardest natural material.
4. What is the chemical formula for water?
A) H2O
B) CO2
C) NaCl
D) HCl
Correct Answer: A) H2O
Rationale: A water molecule consists of two hydrogen atoms and one oxygen
atom. CO2 is carbon dioxide, NaCl is salt, and HCl is hydrochloric acid.
5. What is the boiling point of water at standard atmospheric pressure?
A) 100°C
B) 212°F
C) Both A and B
D) 0°C
Correct Answer: C) Both A and B
,Rationale: 100°C and 212°F are equivalent temperatures, both being the
boiling point of water at sea level (standard atmospheric pressure). 0°C is the
freezing point.
6. Which part of the atom has a positive charge?
A) Electron
B) Neutron
C) Proton
D) Nucleus
Correct Answer: C) Proton
Rationale: Protons are positively charged subatomic particles found in the
nucleus. Electrons are negative, and neutrons have no charge.
7. What is the process by which plants make their own food?
A) Respiration
B) Photosynthesis
C) Fermentation
D) Transpiration
Correct Answer: B) Photosynthesis
Rationale: Plants use sunlight, water, and carbon dioxide to create glucose
(their food) and oxygen in the process of photosynthesis.
8. What type of bond involves the sharing of electron pairs between atoms?
A) Ionic Bond
B) Metallic Bond
C) Covalent Bond
, D) Hydrogen Bond
Correct Answer: C) Covalent Bond
Rationale: Covalent bonding occurs when atoms share electrons to achieve a
stable electron configuration. Ionic bonds involve the transfer of electrons.
9. Which of the following is a noble gas?
A) Oxygen
B) Chlorine
C) Helium
D) Nitrogen
Correct Answer: C) Helium
Rationale: Helium is in Group 18 of the periodic table and is characterized by
its lack of reactivity. Oxygen, chlorine, and nitrogen are reactive.
10. What is the speed of light approximately?
A) 300,000 km/s
B) 300,000 m/s
C) 3,000 km/s
D) 30,000 km/s
Correct Answer: A) 300,000 km/s
Rationale: The speed of light in a vacuum is approximately 299,792 kilometers
per second, often rounded to 300,000 km/s.
11. What is the main component of the Earth's atmosphere?
A) Oxygen
B) Carbon Dioxide
