What part of the wheelbarrow is the fulcrum?

A. Carrier
B. Handle
C. Wheel
D. Handler

Answer

Correct Answer: C. Wheel

Detailed About MCQs

The wheelbarrow’s effort arms are the handles that the person uses to lift up the heavy load in the barrow. The levers help the wheelbarrow to lift heavy loads with minimal effort. The resistance arms are located between the effort arm and the fulcrum. The wheel is the fulcrum that allows the wheelbarrow to pivot up and down.

What is called that disease or infection that is naturally transmissible from humans to vertebrate animals?

A. Reverse Zoonoses
B. Zoonoses
C. Anthroponosis
D. Both A and C

Answer

Correct Answer: D. Both A and C

Detailed About MCQs

Reverse zoonosis, also known as anthroponosis refers to pathogens reservoir in humans that are capable of being transmitted to other non-human animals.

What is called that disease or infection that is naturally transmissible from vertebrate animals to humans?

A. Arnos
B. Chord notes
C. Ananoses
D. Zoonoses

Answer

Correct Answer: D. Zoonoses

Detailed About MCQs

A Zoonoses is an infectious disease caused by a pathogen (an infectious agent, including bacteria, viruses, etc) that has jumped from non-human animals (usual vertebrates) to humans. Zoonoses have different modes of transmission.

In the Composition of the earth, Silicon is:

A. 5.00%
B. 27.72%
C. 46.60%
D. 52.5%

Answer

Correct Answer: B. 27.72%

Detailed About MCQs

Silicon makes up about 27.72% of the Earth’s crust. Silicon is the second most abundant element in Earth’s crust. Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor.
Major Elements in the Earth’s Crust

  • Oxygen 46.60%
  • Silicon 27.72%
  • Aluminum 8.13%
  • Iron 5.00%
  • Calcium 3.63%
  • Sodium 2.83%
  • Potassium 2.59%
  • Magnesium 2.09%

In the Composition of the earth, Oxygen is:

A. 5.00%
B. 27.72%
C. 46.60%
D. 52.5%

Answer

Correct Answer: C. 46.60%

Detailed About MCQs

Major’s element in the Earth’s crust consists of oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium. Oxygen is the chemical element with the symbol O and atomic number 8.
Major Elements in the Earth’s Crust

  • Oxygen 46.60%
  • Silicon 27.72%
  • Aluminum 8.13%
  • Iron 5.00%
  • Calcium 3.63%
  • Sodium 2.83%
  • Potassium 2.59%
  • Magnesium 2.09%

In the Composition of the earth, Aluminum is:

A. 8.1%
B. 14.5%
C. 20.3%
D. 27.5%

Answer

Correct Answer: A. 8.1% 

Detailed About MCQs

Earth’s crust consists of oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium. Aluminum is a chemical element with the symbol Al and atomic number 13. It is a silvery-white, soft, non-magnetic and ductile metal.
Major Elements in the Earth’s Crust

  • Oxygen 46.60%
  • Silicon 27.72%
  • Aluminum 8.13%
  • Iron 5.00%
  • Calcium 3.63%
  • Sodium 2.83%
  • Potassium 2.59%
  • Magnesium 2.09%

Which waves are used in cellular phones?

A. Sound waves
B. Radio waves
C. Ultrasonic waves
D. Electronic waves

Answer

Correct Answer: B. Radio waves

Detailed About MCQs

A mobile phone has both transmitter and receiver sections. When the mobile phone is turned on, it emits radio waves that consist of radiofrequency energy, a form of electromagnetic radiation moves at the speed of light. Mobile phones communicate by transmitting radio waves through a network of fixed antennas called base stations.

Element required for solar energy conversion is?

A. Mercury
B. Silicon
C. Aluminum
D. Copper

Answer

Correct Answer: B. Silicon

Detailed About MCQs

The silicon in a solar cell has impurities meaning that other atoms are purposefully mixed in with the silicon atoms in order to improve silicon’s ability to capture the sun’s energy and convert it into electricity. The basic component of a solar cell is pure silicon, which has been used as an electrical component for decades. Currently, over 90% of the current solar cell market is based on silicon.