← MES Jr. Grade
Past Questions — 2015
Who among the following is one of the recipients of Bharat Ratna award in 2014?
A)
Dr.(Smt.)Neelam Kler
B)
Ashok Kumar Mago
C)
Prof. Om Prakash Upadhyaya
D)
Sachin Tendulkar
The Bharat Ratna recipients announced in 2014 included Sachin Tendulkar and scientist C.N.R. Rao. Among the options, only Sachin Tendulkar is a 2014 Bharat Ratna awardee. The other names listed are not recipients of the Bharat Ratna in 2014.
Plants absorb most part of water needed by them through their
A)
embryonic zone
B)
growing point
C)
root hairs
D)
zone of elongation
Plants absorb most of the water through root hairs because they provide a very large surface area and have thin cell walls, which helps in efficient absorption of water from the soil by osmosis. The embryonic zone and growing point are regions of cell division and growth, while the zone of elongation is mainly for cell enlargement, not water absorption.
Light Year is related to
A)
energy
B)
speed
C)
distance
D)
intensity
A light-year is the distance light travels in vacuum in one year. It is a unit of length, not of energy, speed, or intensity. Therefore, the correct answer is distance.
The air we inhale is mixture of gases. Which of the following gases in the mixture is highest in percentage?
A)
Carbon dioxide
B)
Nitrogen
C)
Oxygen
D)
Ozone
Air is a mixture of gases, and nitrogen makes up the largest share of the atmosphere at about 78%. Oxygen is the next major component at about 21%, while carbon dioxide is only a trace gas and ozone is present in very small amounts. Therefore, nitrogen has the highest percentage in inhaled air.
The energy of food is measured in
A)
Kelvin
B)
Calories
C)
Bushel
D)
None of these
The energy content of food is measured in calories (more precisely, kilocalories in nutrition). Kelvin is a unit of temperature, and bushel is a unit of volume/capacity, so both are incorrect.
Most commonly used bleaching agent is
A)
alcohol
B)
carbon dioxide
C)
chlorine
D)
sodium chloride
Chlorine is the most commonly used bleaching agent among the given options. It is widely used in bleaching of paper pulp, textiles, and as a disinfectant. Alcohol is not a bleaching agent, carbon dioxide is not used for bleaching, and sodium chloride is common salt, not a bleaching agent.
Ozone layer is concentrated above the surface of the earth mainly between
A)
10 to 50 km
B)
15 to 80 km
C)
20 to 100 km
D)
30 to 120 km
The ozone layer is mainly found in the stratosphere, concentrated roughly between 10 km and 50 km above the Earth's surface. This is where most atmospheric ozone occurs, with the maximum concentration around 20–30 km. The other ranges are too high and do not match the usual distribution of the ozone layer.
Which city is known as ‘Electronic City of India’?
A)
Mumbai
B)
Hyderabad
C)
Guragon
D)
Bangalore
Bangalore is widely known as the ‘Electronic City of India’ because it is a major hub for the electronics, IT, and technology industries. The other options are not commonly known by this title: Mumbai is India’s financial capital, Hyderabad is known for IT and pharmaceuticals, and Gurgaon is known as a corporate and IT hub.
Who among the following won double Gold medals in one kilometre and two kilometre time trial cycling event in 2015 Special Olympics held in Los Angeles?
A)
Ravi Kumar
B)
Harjit Singh
C)
Balbir Singh
D)
Rajvir Singh
The athlete who won double gold medals in the 1 km and 2 km time trial cycling events at the 2015 Special Olympics in Los Angeles was Ravi Kumar. The other names in the options are not associated with this specific achievement.
Pressure cooker cooks rice faster because
A)
it always lets the steam escape
B)
high pressure crushes the hard covering of rice grains
C)
it does not let the heat energy escape easily
D)
high pressure raises the boiling point of water
A pressure cooker works by increasing the pressure inside the vessel. When pressure increases, the boiling point of water also increases, so water and steam can get hotter than 100°C. This higher temperature cooks rice faster. Option (a) is wrong because steam is not freely escaped; option (b) is incorrect because rice is not cooked by crushing its covering; option (c) is not the main scientific reason.
The refrigerant commonly used for domestic refrigerators is
A)
alcohol
B)
ammonia
C)
neon
D)
none of these
Domestic refrigerators commonly use refrigerants like Freon (historically) or newer hydrofluorocarbons, not alcohol, ammonia, or neon. Ammonia is used mainly in industrial refrigeration, neon is not used as a refrigerant, and alcohol is not a standard refrigerant. Therefore, among the given options, the correct answer is 'none of these'.
In which of the following countries any male citizen from the age of 20 to 42, unfit for military service must either pay a military tax or opt for a civil service?
A)
Switzerland
B)
Liechtenstein
C)
Israel
D)
Yemen
Switzerland has a long-standing system of compulsory military service for male citizens. Men who are fit are expected to serve in the armed forces, and those who are unfit or do not serve must pay a military exemption tax. This matches the question’s description of a male citizen in the age group required to either pay a military tax or opt for civil service. The other options do not fit this exact system: Israel has compulsory service but the age range and exemption-tax rule are different; Liechtenstein has no such widely known compulsory military system; Yemen also does not match this specific rule.
The scientist who first discovered that the earth revolves round the sun was
A)
Newton
B)
Dalton
C)
Copernicus
D)
Einstein
Nicolaus Copernicus first proposed the heliocentric model, which states that the Earth revolves around the Sun. Newton is known for laws of motion and gravitation, Dalton for atomic theory, and Einstein for relativity, so they are not the correct answer.
The members of the Rajya Sabha are elected for a term
A)
of six years
B)
determined by the state legislative assembly of a state
C)
of four years
D)
of five years
Members of the Rajya Sabha are elected for a term of 6 years. However, one-third of the members retire every 2 years, so the House is a continuing chamber. The other options are incorrect because the Rajya Sabha is not elected for 4 or 5 years, and its term is not determined by any State Legislative Assembly.
The velocity of sound in air (under normal condition) is
A)
30 m/sec
B)
320 m/sec
C)
343 m/sec
D)
3,320 m/sec
The speed of sound in air under normal conditions (about 20°C at sea level) is approximately 343 m/s. Option (a) is too low, (b) is slightly below the standard value, and (d) is far too high.
Super conductivity is a phenomenon in which the resistance of a substance
A)
increases with temperature
B)
decreases with temperature
C)
does not change with temperature
D)
becomes zero at very low temperature
Superconductivity is the state in which a material shows zero electrical resistance when cooled below a certain critical temperature. So the resistance of the substance becomes zero at very low temperature. The other options are incorrect because superconductivity is not about a gradual increase, decrease, or constant resistance with temperature; it is specifically the disappearance of resistance below the critical temperature.
A retired Delhi High Court Judge C.K.Mahajan was recently in the news because
A)
he was nominated to be the Indian Ambassador to Asian Development Bank (ADB)
B)
he will be the head of the working group to prepare a draft of the National Sports Development Code (NSDC)
C)
he is a new member of National Institution for Transforming India (NITI)
D)
he will be the head of the National Urban Health Mission (NRHM)
Retired Delhi High Court Judge C.K. Mahajan was in the news because he was appointed to head the working group set up to prepare a draft of the National Sports Development Code (NSDC). The other options refer to unrelated appointments or bodies: ADB ambassador, NITI member, and NRHM head do not match the news item.
Who invented Electric Generator?
A)
Sir Alexander Graham Bell
B)
Michael Faraday
C)
Alfred B.Nobel
D)
Thomas Alva Edison
Michael Faraday is credited with inventing the first electromagnetic electric generator, based on electromagnetic induction. Sir Alexander Graham Bell invented the telephone, Alfred B. Nobel invented dynamite and established the Nobel Prize, and Thomas Alva Edison is known for the practical incandescent lamp and electric power systems, not the original invention of the electric generator.
Microphone is used to convert
A)
sound waves into electrical energy
B)
sound waves into light rays
C)
electrical energy into sound waves
D)
sound waves into magnetic currents
A microphone is a transducer that converts sound energy (sound waves) into electrical signals/energy. Option (b) is incorrect because microphones do not produce light. Option (c) describes a loudspeaker, which converts electrical energy into sound. Option (d) is incorrect because microphones do not convert sound into magnetic currents.
The members of the State Public Service Commission are appointed by
A)
Chief Minister
B)
Chief Justice
C)
Governor
D)
Vice-president
Under Article 316 of the Indian Constitution, the Chairman and other members of a State Public Service Commission are appointed by the Governor of the state. The Chief Minister, Chief Justice, and Vice-President have no such appointing power in this matter.
Celebration of National Voters Day on 25th January every year is a strategy to
A)
promote free and fair election nationwide
B)
encourage reducing the election related expenditures
C)
increase enrolment of voters
D)
discourage possible communalism in the politics
National Voters’ Day is celebrated on 25th January to encourage eligible citizens, especially new voters, to register and participate in the electoral process. It is a voter awareness and enrolment initiative of the Election Commission of India. Hence, the main strategy is to increase enrolment of voters. The other options are not the primary objective of National Voters’ Day.
A firm manufactures a product which is sold for Rs.10.50 per unit and the fixed cost of the assets is Rs.50000/- with a variable cost of Rs.6.50 per unit. How many units must be produced to earn a profit of Rs.1000/-? What would be the profit for sales volume of 20,000 units?
The locations of the atoms and their particular arrangement in a given crystal are described by means of
A)
intermolecular bond
B)
space lattice
C)
diffusion
D)
potential energy
In crystal structure, the positions of atoms and their regular arrangement are described by a space lattice (also called crystal lattice). It is the periodic 3D arrangement of points representing atomic positions.
- (a) Intermolecular bond refers to forces between molecules, not the geometric arrangement.
- (c) Diffusion is the movement of atoms or molecules from higher to lower concentration.
- (d) Potential energy is an energy concept, not a description of crystal arrangement.
Salvage value and service life of an equipment are
A)
based on first cost
B)
estimated on the basis of past experience
C)
fictitious values
D)
actual values
Salvage value and service life are not known exactly at the time of purchase, so they are usually estimated from previous records, usage patterns, maintenance history, and similar equipment performance. They are not based on first cost, and they are not actual values because they are forecasted rather than directly measured. Hence, the correct choice is (b).
The performance of a specific task in CPM is known as
A)
dummy
B)
event
C)
activity
D)
contract
In CPM (Critical Path Method), the actual performance of a specific task is called an activity. An activity consumes time and resources and is represented by an arrow/node in network scheduling. A dummy is a zero-time logical link, an event is a milestone or point in time, and contract is unrelated to CPM terminology.