General-Studies Quiz For FCI Phase I 2022- 4th October

Q1. Kelvin is the unit of
(a) length
(b) temperature
(c) time
(d) mass
(e) None of the above

Q2. Railway tracks are banked on curves so that
(a) necessary centrifugal force may be obtained from the vertical component of the weight of the train
(b) no frictional force may be produced between the tracks and the wheels
(c) necessary centripetal force may be obtained from the horizontal component of the weight of the train
(d) the train may not fall collapse inward
(e) None of the above

Q3. Two equal and opposite forces can form
(a) torque
(b) couple
(c) power
(d) all of the above
(e) None of the above

Q4. Which of the following has the largest number of chromosomes?
(a) Human beings
(b) Pteridophytes
(c) Elephants
(d) Bryophytes
(e) None of the above

Q5. The phenomenon of genetic mutation can not occur in
(a) DNA
(b) RNA
(c) chromosome
(d) ribosome
(e) None of the above

Q6. The main function of the Golgi body is
(a) respiration
(b) to begin cell division
(c) to produce gastric juice
(d) secretion
(e) None of the above

Q7. The torque produced by a force depends on
(a) The magnitude of the force
(b) The direction of the force
(c) The point of application of the force relative to origin
(d) All of the above
(e) None of the above

Q8. Which of the following could act as a propellant for rockets?
(a) Liquid oxygen + Liquid argon
(b) Liquid hydrogen + Liquid oxygen
(c) Liquid nitrogen + Liquid oxygen
(d) Liquid hydrogen + Liquid nitrogen
(e) None of the above

Q9. Which one of the following mixtures is homogeneous?
(a) Starch and sugar
(b) Methanol and water
(c) Graphite and charcoal
(d) Calcium carbonate and calcium bicarbonate
(e) None of the above

Q10. Helium is preferred to hydrogen in air balloons because it
(a) is cheaper
(b) is less dense
(c) has greater lifting power
(d) does not form an explosive mixture with air
(e) None of the above

Solutions

S1.Ans. (b)
Sol. Kelvin is the SI unit of thermodynamic temperature, and one of the seven SI base units. The Kelvin scale is an absolute thermodynamic temperature scale, meaning it uses absolute zero as its null (zero) point.

S2.Ans. (c)
Sol. Railway tracks are banked at the curves so that the necessary centripetal force may be obtained from the horizontal component of the reaction on the train. The outer track of the bend is slightly higher than the inner, this is known as banking of the rails or tracks, the following three kinds of force act on it:
the weight of the train acting vertically downwards,
the normal reaction provided by the track, acting upwards, to support the weight of the train, and
the frictional force acting between the contact area of wheels and the track surface helps the train move forward.

S3.Ans. (b)
Sol. When two equal and opposite forces act at the same point, then resultant forces is double than either of the forces or two equal and opposite parallel forces not acting along the same line form a couple.

S4.Ans. (b)
Sol. Ferns, a group under pteridophytes have large number of chromosomes e.g., Ophioglossum reticulatum has 2n=1260, highest known in all life forms.

S5.Ans. (d)
Sol. The ribosomes are the protein-synthesizing factories. DNA, RNA and chromosomes are all genetic materials made of nucleotides, which are the sites of genetic mutations e.g., transversion and transition, point mutations, etc. DNA, RNA are genetic material which helps in replication of genetic material, while chromosomes are the part of DNA.

S6. Ans. (d)
Sol. The Golgi complex and rough ER work closely. When a protein is made in the ER, then transition vesicles are synthesized. These vesicles float through the cytoplasm to the Golgi apparatus and are absorbed. After the Golgi does its work on the molecules inside the sac or the vesicle a secretory vesicle is created and released into the cytoplasm. So the main function of the Golgi bodies is secretion.

S7.Ans. (d)
Sol. Torque is the cross product of force and perpendicular distance to an axis of rotation. The torque produced by a force depends on the magnitude of the force, the direction of the force, the point of application of the force relative to origin.

S8.Ans. (b)
Sol. Liquid hydrogen and liquid oxygen are used as excellent fuel for rockets. H2(l) has low mass and high enthalpy of combustion whereas oxygen is a strong supporter of combustion.

S9.Ans. (b)
Sol. Homogeneous miniature have the Same composition throughout. A mixture of methanol (a liquid) and water (a liquid) is homogeneous.

S10.Ans. (d)
Sol. Hydrogen combines with oxygen with explosive force in the presence of a spark. Helium is an inert gas that will not burn or explode, so is much safer to use in balloons instead of hydrogen. 27.