Science & Technology

Consider the following statements: 1. Femur is the longest bone in the human body. 2. Cholera is a disease caused by bacteria. 3. ‘Athlete’s foot’ is a disease caused by virus. Which of the statements given above are correct?

1. (a)1 and 2
2. (b)2 and 3
3. (c)1 and 3
4. (d)1, 2 and 3

50 men or 80 women can finish a job in 50 days. A contractor deploys 40 men and 48 women for this work, but after every duration of 10 days, 5 men and 8 women are removed till the work is completed. The work is completed in

1. (a)45 days
2. (b)50 days
3. (c)54 days
4. (d)62 days

Consider the following statements: 1. Smart Card is a plastic card with an embedded microchip. 2. Digital Technology is primarily used with new physical communication medium such as satellite and fibre optics transmission. 3. A digital library is a collection of documents in an organized electronic form available on the Internet only. Which of these statements given above is/are correct?

1. (a)3 only
2. (b)1 and 2
3. (c)2 and 3
4. (d)1, 2 and 3

Three students are picked at random from a school having a total of 1000 students. The probability that these three students will have identical date and month of their birth is

1. (a)3/1000
2. (b)3/365
3. (c)1/(365)²
4. (d)1/(365)³

A person stands at the middle point of a wooden ladder which starts slipping between a vertical wall and the floor of a room, while plane. The path traced by a person standing at the middle point of the slipping ladder is

1. (a)A straight line
2. (b)An elliptical path
3. (c)A circular path
4. (d)A parabolic path

Three flags, each of different colour, are available for a military exercise. Using these flags, different codes can be generated by waving i) a single flag of different colours, or ii) any two flags in a different sequence of colours, or iii) three flags in a different sequence of colours. The maximum number of codes that can be generated is

1. (a)6
2. (b)9
3. (c)15
4. (d)18

With reference to the work of human kidney, consider the following statements: 1. After the waste is removed in the kidney, the cleaner blood is sent back through renal artery. 2. From Bowman’s capsule, the filtered liquid passes through tiny tubes where much of the glucose is reabsorbed and sent back to the blood in the renal vein. Which of these statements is/are correct?

1. (a)Only 1
2. (b)Only 2
3. (c)Both 1 and 2
4. (d)Neither 1 nor 2

A hydrogen-inflated polythene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will

1. (a)Decrease in size
2. (b)Flatten into a disc-like shape
3. (c)Increase in size
4. (d)Maintain the same size and shape

Consider the following statements: 1. India launched its first full-fledged meteorological satellite (METSAT) in September 2002. 2. For the first time, the space vehicle PSLV-C4 carried a payload of more than 1000 kg into a geosynchronous orbit. Which of these statements is/are correct?

1. (a)Only 1
2. (b)Only 2
3. (c)Both 1 and 2
4. (d)Neither 1 nor 2

Consider the following statements: 1. Steam at 100 °C and boiling water at 100 °C contain the same amount of heat. 2. Latent heat of fusion of ice is equal to the latent heat of vaporization of water. 3. In an air-conditioner, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils. Which of these statements is/are correct?

1. (a)1 and 2
2. (b)2 and 3
3. (c)Only 2
4. (d)Only 3

Consider the following statements: A four-wheel vehicle moving on a sharp circular path at high speed will 1. Overturn about its outer wheels. 2. Overturn about its inner wheels. 3. Skid outwards. 4. Skid inwards. Which of these statements are correct?

1. (a)1 and 3
2. (b)2 and 4
3. (c)2 and 3
4. (d)1 and 4

Which one of the following statements is correct?

1. (a)Liquid sodium is employed as a coolant in nuclear reactors
2. (b)Calcium carbonate is an ingredient of toothpaste
3. (c)Bordeaux mixture consists of sodium sulphate and lime
4. (d)Zinc amalgams are used as a dental filling

Diffusion of light in the atmosphere takes place due to

1. (a)Carbon dioxide
2. (b)Dust particles
3. (c)Helium
4. (d)Water vapours

An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil then

1. (a)Remains horizontal
2. (b)Is inclined to the horizontal with smaller depth at the rear end
3. (c)Is inclined to the horizontal with larger depth at the rear end
4. (d)Assumes parabolic curve

A car travels the first one-third of a certain distance with a speed of 10 km/hr, the next one-third distance with a speed of 20 km/hr and the last one-third distance with a speed of 60 km/hr. The average speed of the car for the whole journey is

1. (a)18 km/hr
2. (b)24 km/hr
3. (c)30 km/hr
4. (d)36 km/hr

Consider the following statements The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is 1. To keep the washing powder dry 2. To maintain the alkalinity of the powder Which of these statements is/are correct?

1. (a)Only 1
2. (b)Only 2
3. (c)Both 1 and 2
4. (d)Neither 1 nor 2

‘A’ walks around a circular field at the rate of one round per hour while ‘B’ runs around it at the rate of six rounds per hour. They start in the same direction from the same point at 7.30 a.m. They shall first cross each other at

1. (a)8.30 a.m.
2. (b)8.10 a.m.
3. (c)7.48 a.m.
4. (d)7.42 a.m.

With reference to Indian defence, which one of the following statements is correct?

1. (a)With the induction of Prithvi II, the IAF is the only air force in the world with surface-to-surface ballistic missiles under its command
2. (b)Sukhoi-30 MKI jet fighters can launch air-to-air and air-to-surface precision missiles
3. (c)Trishul is a supersonic surface-to-air missile with a range of 30 km
4. (d)The indigenously built INS Prabal can launch surface-to-surface missiles

No answer is recorded for this question: (Ambiguous (both b and d are correct))

Four different candles, which can last for 5 hours, 4 hours, 3 hours and 2 hours of burning, respectively, are lit in a room at the same instant and allowed to burn till such time that the three candles in the room get extinguished. The cost of burning each one of these candles is 75 paise per hour. The cost involved is:

1. (a)Rs. 2.75
2. (b)Rs. 3.75
3. (c)Rs. 9.75
4. (d)Rs. 12.50

Which one of the following statements is correct?

1. (a)Milk contains none of the B-vitamins
2. (b)Vitamin A (retinal) deficiency leads to dry and scaly skin
3. (c)One of the symptoms of scurvy is pain in the joints
4. (d)Vitamin B1 (thiamine) deficiency can lead to heart failure

Which one of the following statements is correct?

1. (a)The velocity of sound in air increases with the increase of temperature
2. (b)The velocity of sound in air is independent of pressure
3. (c)The velocity of sound in air decreases as the humidity increases
4. (d)The velocity of sound in air is not affected by the change in amplitude and frequency

A two-member committee comprising of one male and one female member is to be constituted out of five males and three females. Amongst the females, Ms. A refuses to be a member of the committee in which Mr. B is taken as the member. In how many different ways can the committee be constituted?

1. (a)11
2. (b)12
3. (c)13
4. (d)14

If the radius of the earth were shrunk by one per cent, its mass remaining the same, the value of ‘g’ on the earth’s surface would

1. (a)increase by 0.5%
2. (b)increase by 2%
3. (c)decrease by 0.5%
4. (d)decrease by 2%

Octopus is

1. (a)an arthropod
2. (b)an echinoderm
3. (c)a hemichordate
4. (d)a mollusc

Consider the following conditions of sick human body 1. Swollen lymph nodes 2. Sweating at night 3. Loss of memory 4. Loss of weight Which of these are the symptoms of AIDS?

1. (a)1 and 2
2. (b)2, 3 and 4
3. (c)1, 2 and 3
4. (d)1, 2, 3 and 4