General-Studies Quiz For FCI Phase I 2022- 19th October

Q1. The speed of a body that has Mach number more than 1 is
(a) supersonic
(b) subsonic
(c) 300 m/s
(d) about 10 m/s
(e) None of the above

Q2. Why is it difficult to measure the coefficient of expansion of a liquid than solid?
(a) Liquids tend to evaporate at all temperatures
(b) Liquids conduct more heat
(c) Liquids expand too much when heated
(d) Their containers also expand when heated
(e) None of the above

Q3. Normal adult human male has
(a) 10 g of haemoglobin/100 g of blood
(b) 14 g of haemoglobin/100 g of blood
(c) 18 g of haemoglobin/100 g of blood
(d) 24 g of haemoglobin/100 g of blood
(e) None of the above

Q4. If an object moves with constant velocity then which one of the following statements is NOT correct?
(a) Its motion is along a straight line
(b) Its speed changes with time
(c) Its acceleration is zero
(d) its displacement increases linearly with time
(e) None of the above

Q5. Whether an object will float or sink in a liquid, depends on
(a) mass of the object only
(b) mass of the object and density of liquid only
(c) difference in the densities of the object and liquid
(d) mass and shape of the object only] (e) None of the above

Q6. An object is moving with uniform acceleration a. Its initial velocity is u and after time t its velocity is v. The equation of its motion is v = u + at. The velocity (along y-axis) time (along x-axis) graph shall be a straight line
(a) passing through origin
(b) with x-intercept u
(c) with y-intercept u
(d) with slope u
(e) None of the above

Q7. Which one of the following has maximum inertia?
(a) An atom
(b) A molecule
(c) A one-rupee coin
(d) A cricket ball
(e) None of the above

Q8. Which one of the following is the value of 1 kWh of energy converted into joules?
(a) 1.8 × 106 J
(b) 3.6 × 106 J
(c) 6.0 × 106 J
(d) 7.2 × 106 J
(e) None of the above

Q9. Which one of the following statements about gravitational force is NOT correct?
(a) It is experienced by all bodies in the universe
(b) It is a dominant force between celestial bodies
(c) It is a negligible force for atoms
(d) It is same for all pairs of bodies in our universe
(e) None of the above

Q10. A ball balanced on a vertical rod is an example of
(a) stable equilibrium
(b) unstable equilibrium
(c) neutral equilibrium
(d) perfect equilibrium
(e) None of the above

Solutions

S1.Ans. (a)
Sol. Supersonic describes things that can travel faster than the speed of sound. The speed of a body that has Mach number more than 1 is supersonic.

S2.Ans. (d)
Sol. Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight they expand more than solids. This is the principle behind liquid-in-glass thermometers.

S3.Ans. (b)
Sol. Normal range of Haemoglobin in adult human male is 14-17 g/dl of blood.

S4.Ans. (a)
Sol. An object has constant velocity means that it is moving along a straight line, and as every second of time goes by, the object travels through the same number of meters.

S5.Ans. (c)
Sol. Whether an object will float or sink in a liquid, depends on difference in the densities of the object and liquid.

S6.Ans. (c)
Sol. An object is moving with uniform acceleration a. Its initial velocity is u and after time t its velocity is v. The equation of its motion is v = u + at. The velocity (along y-axis) time (along x-axis) graph shall be a straight line with y-intercept u.

S7.Ans. (d)
Sol. A cricket ball has maximum inertia.

S8.Ans. (a)
Sol. kWh (kilowatt-hour) and Joules are two energy units. 1 watt is defined as 1 joule/second. So if you multiply a watt times seconds, you get Ws which is also a joule. So 1kW is 1000W, and an hour is 60 seconds x 60 minutes. So 1kWh = 3600kWs = 3,600,000Ws = 3,600,000J So 1kWh = 3. 6×10^6J

S9.Ans. (d)
Sol. The gravitational force is a force that attracts any objects with mass. This is called Newton’s Universal Law of Gravitation. The gravitational force on Earth is equal to the force the Earth exerts on you. At rest, on or near the surface of the Earth, the gravitational force equals your weight.

S10.Ans. (a)
Sol. A ball balanced on a vertical rod is an example of unstable equilibrium.