**If the point A (7, k) is the vertex of an isosceles triangle ABC with base BC, where B = (2, 4) and C = (6, 10), then what is ‘k’?**

(1) 6

(2) 3

(3) 4

(4) 5

**Ans:-** (4) 5

**If the distance between the points (na, nb) and (a, b) is 4 times the distance between the points (5a, 5b) and (a, b), then ‘n’ is equal to-**

(1) 11 or -13

(2) 11

(3) 13

(4) 17 or -15

**Ans:- (**4) 17 or -15

**ABC is a tringle whose centroid is G. If A is (-3, 1) B is (2, b), C is (a, -4) and G is (1, -1) then find ‘a’ and ‘b’.**

1) a = 4, b = 0

2) a = 0, b = 4

3) a = 3, b = 2

4) a = 5, b = 2

**Ans:-** 1) a = 4, b = 0

**The equation of a straight line is 2x-3y+2 = 0. What is its slope?**

(1) 2/3

(2) -2

(3) 2

(4) – 2/3

**Ans:-** (1) 2/3

**Read the law given below and identify the same:**

**The mass on any substance liberated from an electrolyte is directly proportional to the quantity of charge passing through the solution.**

(1) Avogadro’s law

(2) Faraday’s first law of electrolysis

(3) Faraday’s second law of electrolysis

(4) Kirchhaoff’s law of electricity

**Ans: –** 2) Faraday’s first law of electrolysis

**The value of Avogadro’s constant is**

(1) 6.022 × 10^{23} per mole

(2) 58.04 × 10^{-2} per mole

(3) 69.51 × 10^{-18} per mole

(4) 6.022 × 10^{14} per mole

**Ans:-** (1) 6.022 × 10^{23} per mole

**In an experiment, 295 mg of copper is deposited when a current of 500 mA passes for 30 minutes. Find the electrochemical equivalent of copper**

(1) 32.77 a 10^{-8} kg/ coulomb

(2) 58.4 kg/ coulomb

(3) 109.5 × 10^{8} kg/ coulomb

(4) 1/32.77 X 10^{-8} kg/ coulomb

**Ans:-** (1) 32.77 a 10^{-8} kg/ coulomb

**Which one of the following is the correct unit of angular velocity?**

1) m/ minute

2) cm/ sec^{2 }

3) cm/sec

4) radians/ sec

**Ans:-** 4) radians/ sec

**The force by which a body is attracted towards the centre of the earth is called**

1) Gravitational force

2) Mass

3) Momentum

4) Impulsive force

**Ans:-** 1) Gravitational force

**The maximum displacement of a vibrating body from its mean position is called**

1) Gyration

2) Wavelength

3) Amplitude

4) Impulse

**Ans:-** 3) Amplitude

**The kinetic energy of a body depends upon**

1) Mass, gravity and height

2) Its mass alone

3) Its velocity alone

4) Both mass and velocity

**Ans:-** 4) Both mass and velocity

**A ball weighing 25 grams is thrown vertically into the air. It takes 15 seconds to reach its highest point. How much time would it take to reach the ground from its highest point?**

1) More data are required for calculation

2) Less than 15 seconds

3) More than 15 seconds

4) 15 seconds

**Ans:-** 4) 15 seconds

**The term ‘Squirrel Cage’ is associated with**

1) Pressure gauges

2) Internal combustion engines

3) Potentiometers

4) Electric motors

**Ans: –** 4) Electric motors

**The phenomenon of increase in the temperature of the earth’s atmosphere due to absorption of the infra-red radiations reflected from the earth’s surface is called**

1) Tsunami

2) Solar heating

3) Green-house effect

4) Seismic effect

**Ans:-** 3) Green-house effect

**Why is it recommended that people should not use charcoal or gas stoves in closed rooms?**

1) The electrical wiring in the room may catch fire

2) The stoves will get extinguished

3) It can cause carbon monoxide poisoning

4) The stoves may burst

**Ans:-** 3) It can cause carbon monoxide poisoning

**The most effective way to improve safety in a vast organization like the Indian Railways is to**

1) Ignore small acts of negligence by the staff

2) Carry out frequant checks

3) Educate the staff at all levels

4) Punish defaulting staff

**Ans:-** 2) Carry out frequant checks

**The density of water is maximum at**

1) 100°C

2) 0°C

3) -273°C

4) 4°C

**Ans:-** 4) 4°C

**Which one of the following quantities does not have a unit?**

1) Velocity

2) Density

3) Specific Gravity

4) Mass

**Ans:-** 3) Specific Gravity

**A Swimmer finds it easier to swim in sea water than in plain water. Why?**

1) Sea water has less contamination

2) Sea waves help a swimmer to swim

3) Sea water has higher density than plain water

4) Sea has a much higher volume of water

**Ans:-** 3) Sea water has higher density than plain water

**Humidity refers to**

1) Both temperature and moisture contents of the air

2) Temperature of the air

3) Moisture content of the air

4) Presure of the air

**Ans:-** 3) Moisture content of the air

**Boyle’s law states that**

1) Volume is directly proportional to temperature

2) Pressure is inversely proportional to temperature

3) Pressure is directly proportional to temperature

4) Presure is inversely proportional to valume

**Ans:-** 4) Presure is inversely proportional to valume

**Purity of milk is confirmed by**

1) Barometer

2) Lactometer

3) Altimeter

4) Hygroscope

**Ans:-** 2) Lactometer

**A stick is dipped in a vessel containing water. It appears bent due to the property of**

1) Reflection

2) Newton’s Law of Motion

3) Refraction

4) Buoyancy

**Ans:-** 3) Refraction

**The temperature on the surface of the sun is about**

1) 8 × 10^{15°}C

2) 500°C

3) 6000°C

4) 1000°C

**Ans:-** 3) 6000°C

**The planet farthest from the Sun is**

1) Pluto

2) Mercury

3) Jupiter

4) Neptune

**Ans:-** 1) Pluto

**Which one of the following is measured on the ‘RICHTER SCALE’?**

1) The speed of a rocket 5 seconds after takes off

2) The intensity of thunderstorm

3) The intensity of an earthquake

4) The speed at which a player serves the ball in Lawn Tennis

**Ans:-** 3) The intensity of an earthquake

**As a train approaches us, the frequency or shrillness of its whistle increases. This phenomenon is explained by-**

1) Big Bang Theory

2) Doppler Effect

3) Charles’ Law

4) Archimedes Principle

**Ans:-** 2) Doppler Effect

**The load on a spring per unit deflection is called**

1) Stress

2) Flexbility

3) Stiffness

4) Strain

**Ans:-** 3) Stiffness

**The term acceleration means**

1) Maximum speed of a vehicle

2) Rate of change of time

3) Rate of change of velocity

4) Rate of change of distance

**Ans:-** 3) Rate of change of velocity

**A body of mass 10 kg accelerates from rest at the rate of 3 m/sec2. What distance would the body travel in 10 seconds?**

1) 250 metres

2) 100 metres

3) 150 metres

4) 200 metres

**Ans:-** 3) 150 metres

**The efficiency of a heat engine is 40%. If 10,000 joules of heat energy are supplied to it, then the useful work done by the engine would be**

1) 40,000 Joules

2) 10,000 Joules

3) 25,000 Joules

4) 4,000 Joules

**Ans:-** 1) 40,000 Joules

**A gas is allowed to expand at constant temperature from an initial volume of 10 ml to a final volume of 300 ml. At the end of the expansion, the pressure of the gas was found to be 1 atmosphere. What was the initial pressure of the gas?**

1) 9 atmosphere

2) 1 atmosphere

3) 3 atmosphere

4) 1/3 atmosphere

**Ans:-** 3) 3 atmosphere

**There are three non-collinear points. How many circles can be drawn passing through them?**

1) Infinite

2) One

3) Two

4) Three

**Ans:-** 2) One

**What do you understand by the term ‘Absolute Pressure’?**

1) It is the atmospheric pressure at mean sea level

2) It is the atmospheric pressure expressed in kg/ cm2

3) It is the pressure equal to the algebraic sum of atmospheric and gauge pres sures

4) It is the pressure as seen on the gauge of a pressure measuring instrument

**Ans:-** 4) It is the pressure as seen on the gauge of a pressure measuring instrument

**How many odd numbers in the above sequence are immediately followed by an odd number?**

1) More than 4

2) 2

3) 3

4) 4

**Ans:-** 1) More than 4

**How many even numbers are there in the sequence which are immediately preceded by an odd number but immediately followed by an even number?**

1) 5

2) 2

3) 3

4) 4

**Ans:-** 3) 3

**How many odd numbers are there in the sequence which are immediately preceded and also immediately followed by an even number-**

1) 5

2) 2

3) 3

4) 4

**Ans: –** 3) 3

**Study the following number sequence –**

**5 9 8 1 3 2 7 4 3 8**

**If the first and the second digits in the sequence are interchanged, also the third and fourth digits, the fifth and sixth digits, and so on, then which digit would be the seventh counting to your left?**

1) 8

2) 1

3) 4

4) 7

**Ans:-** 1) 8

**If the numbers from 1 to 45 which are exactly divisible by 3 are arranged in an ascending order, minimum number being kept frist, then which number would come at the ninth place from the first?**

1) 30

2) 21

3) 24

4) 27

**Ans:-** 1) 30

**Find the value of**

**8.55 × 8.55 – 2 × 8.55 × 3.55 + 3.55 × 3.55**

1) 27.5

2) 20

3) 25

4) 36

**Ans:-** 3) 25

**A husband and wife have six married sons and each of them has four children. The total number of members in the family is-**

1) 40

2) 30

3) 36

4) 38

**Ans:-** 4) 38

**ba-b-aab-a-b**

1) babb

2) abab

3) abba

4) baba

**Ans:- **Update soon

**mnonopqopqrs —–**

1) qrstu

2) mnopq

3) oqrst

4) pqrst

**Ans:-** 4) pqrst

**c-bba-cab-ac-ab-ac**

1) bcacb

2) abcbc

3) acbcb

4) babcc

**Ans:-** 3) acbcb

**Who is to the North-east of the person who is to the left of Kunal?**

1) Prashant

2) Dinesh

3) Nitin

4) Atul

**Ans:-** 1) Prashant

**If a boy walks from Nitin, meets Atul, followed by Kunal, Dinesh and Prashant, then how many metres has he walked if he travelled the straight distance all through?**

1) 245 metres

2) 155 metres

3) 185 metres

4) 225 metres

**Ans:-** 4) 225 metres

**Roshan is taller than Rahul who is shorter than Sushil. Mirza is taller than Harry but shorter than Rahul. Sushil is shorter than Roshan. Who is the tallest?**

1) Harry

2) Roshan

3) Sushil

4) Rahul

**Ans:-** 2) Roshan

**Roshan is taller than Rahul who is shorter than Sushil. Mirza is taller than Harry but shorter than Rahul. Sushil is shorter than Roshan. Who is the shortest?**

1) Roshan

2) Harry

3) Mirza

4) Rahul

**Ans:-** 2) Harry

**Which one of the following causes of environmental pollution cannot be attributed to human beings?**

1) Uncontrolled growth of human population

2) Rapid industrialisation

3) Rapid urbanisation

4) Volcanic eruptions

**Ans:-** 4) Volcanic eruptions

**Which one of the following gases is manly responsible for the GREENHOUSE EFFECT?**

1) Sulphur dioxide

2) Carbon mono-oxide

3) Hydrogen sulphide

4) Carbon dioxide

**Ans:-** 4) Carbon dioxid