Everyday Science — All MCQs
2717 questions available
Q41.What is the working efficiency of diesel engine?
Correct Answer: D
Diesel engines typically have a working efficiency of 25-45%.
Q42.1HP is equal to how many watts?
Correct Answer: C
1 Horsepower (HP) = approximately 746 watts.
Q43.Class I HLA molecules are used only in: HLA stands for?
Correct Answer: A
Class I HLA molecules are found on all nucleated cells.
Q44.Ultrasound is used in liquid gold purification. It is also used for?
Correct Answer: C
Ultrasound is widely used in prenatal scanning (sonography).
Q45.Earth life is approximately how many years?
Correct Answer: C
Earth is approximately 4.5 billion years old.
Q46.Solar Plates are made of which type of material :
Correct Answer: C
Solar panels (plates) are primarily made of silicon semiconductor material.
Q47.Smallest Planet in our Solar System is:
Correct Answer: A
Mercury is the smallest planet in our solar system.
Q48.Which Metal is liquid at room Temperature?
Correct Answer: C
Mercury is the only metal that remains liquid at room temperature.
Q49.What is the percentage of water in Human body?
Correct Answer: B
The human body is approximately 60% water on average.
Q50.Name the scientist who discovered the Blood circulation system :
Correct Answer: D
William Harvey discovered the blood circulation system in 1628.
Q51.A normal human ear can hear the sound of ----------frequency:
Correct Answer: B
The human audible frequency range is typically 20 Hz to 20,000 Hz (20 kHz).
Q52.Which one is belong to cat family in groups and hunts:
Correct Answer: C
Lions belong to the cat family (Felidae) and are known for hunting in groups (prides).
Q53.How much percentage of rectified spirit contain Alcohol:
Correct Answer: A
Rectified spirit typically contains about 90-95% alcohol by volume.
Q54.Which are the characters that make a plant hydrophytes is called:
Correct Answer: D
Hydrophytes have aerenchyma and lack mechanical tissue for aquatic adaptation.
Q55.Mass of photon is equal to?
Correct Answer: B
A photon has zero rest mass and travels at the speed of light.
Q56.Enzymes reaction is a?
Correct Answer: C
Enzymes act as biological catalysts that speed up chemical reactions in living organisms.
Q57.Particular genetic disorder heredity in abnormal person due to?
Correct Answer: B
Genetic disorders are often caused by abnormalities in chromosomes.
Q58.Which organ/hormone control the temperature of body?
Correct Answer: C
The hypothalamus in the brain regulates body temperature.
Q59.Inventor of Neon gas?
Correct Answer: C
Sir William Ramsay discovered neon gas in 1898 along with Morris Travers.
Q60.Cosmic rays were discovered by:
Correct Answer: A
Victor Hess discovered cosmic rays in 1912 during balloon flights.