(276) Defeciency of following vitamin decreases hemoglobin production ?
- A. Biotin
- B. Thiamine
- C. Niacin
- D. Pyridoxine
(277) Which of the following explains the reason why there is no total eclipse of the sun?
- A. Size of the earth in relation to that of moon
- B. Orbit of moon around earth
- C. Direction of rotation of earth around sun
- D. Area of the sun covered by the moon
(278) A moderator is used in nuclear reactor in order to ?
- A. Accelerate the neutrons
- B. Slow down the speed of the neutrons
- C. Increase the number of elections
- D. Decrease the number of electrons
(279) In a railway track, two rails are joined end to end with a gap tin between them because?
- A. Steel can be saved
- B. Accidents due to contraction in winter can be avoided
- C. Air gaps are necessary for bearing the weight of running train
- D. Accidents due to expansion in summer can be avoided
(280) Parsec is a unit of ?
- A. Energy
- B. Time
- C. Power
- D. Distance
(281) A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?
- A. 25 miles per sec
- b ) 60 miles per sec
- C. 7 miles per sec
- D. 10 miles per sec
(282) How many bones are there in an adult human being?
- A. 210
- B. 260
- C. 206
- D. 300
(283) A person of which of the following blood groups is called a universal donor?
- A. O
- B. AB
- C. A
- D. B
(284) Myopia is a disease connected with ?
- A. Ears
- B. Eyes
- C. Lungs
- D. Brain
(285) What is the average adult pulse rate?
- A. 140-150
- B. 115-125
- C. 72-80
- D. 60
(286) Bats can also fly in dark because they are capable of taking the help of ?
- A. Ultraviolet Waves
- B. Ultrasonic Waves
- C. Electromag netic Waves
- D. Special Retina
(287) In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as ?
- A. Electroplati ng
- B. Annealing
- C. Galvanizati on
- D. Vulcanizatio n
(288) Coulomb is the scientific unit to measure?
- A. Velocity
- B. Temperatur e
- C. Mass
- D. None OF These
(289) The chemical name of quartz is:
- A. Silicon Dioxide
- B. Stannous Oxide
- C. Aluminium Oxide
- D. None
(290) Phosphorus is an essential component of one of the following biological molecules: Page 19 o
- A. Amino acids f 65
- B. Nucleic acids
- C. Carbohydra tes
- D. None
(291) It is a secondary plant nutrient?
- A. Nitrogen
- B. Phosphorus
- C. Sulphur
- D. none
(292) When a patient’s immune system becomes reactive to a drug, this is an example of?
- A. Super infection
- B. Drug resistance
- C. Allergy
- D. none
(293) People living in high altitudes (like mountains) usually have a ?
- A. smaller number of Red Blood Cells
- B. larger number of Red Blood Cells
- C. smaller number of White Blood Cells
- D. larger number of White Blood Cells
(294) are negatively (-) charged particles of an atom?
- A. Protons
- B. Neutrons
- C. Electrons
- D. None of These
(295) Diesel engine was discovered by ?
- A. Paul Muller
- B. Faraday
- C. Waldeyer
- D. Rudolf Diesel
(296) Who invented the safety pin?
- A. Charles Goodbye
- B. steward Harshone
- C. Walter Hunt
- D. A.Rose
(297) The inner most part of the earth is ?
- A. Crust
- B. Mental
- C. Core
- D. None of these
(298) How many teeth are there in human mouth?
- A. 30
- B. 33
- C. 32
- D. 31
(299) Sunlight is composed of ?
- A. Three colours
- B. six colours
- C. seven colours
- D. eight colours
(300) A glass chimney stops an oil lamp from smoking because:
- A. It increases the supply of oxygen to the flame by convection
- B. The heat produced ensures complete
- C. Both to these
- D. Neither of these