UPSC EPFO SOLVED PAPER 2012

Total Questions: 100

31. Gun metal is an alloy of

Correct Answer: (a) Copper, Tin and Zinc
Solution:

An alloy is a metallic intimately mixed solid mixture of two or more elements, at least one of which is metal. Gun metal is 85% copper, 5% tin, 5% zinc and 5% lead. It is used in making guns, medals, barrels, gears and bearings.

32. If the electrical resistance of a typical substance suddenly drops to zero, then the substance is called

Correct Answer: (c) Superconductor
Solution:

If the electrical resistance of a typical substance suddenly drop to zero, then the substance is called Superconductor.

33. The material used for electric fuse is an alloy of tin and lead. This alloy should have :

Correct Answer: (a) High specific resistance and low melting point
Solution:

The material used for electric fuse is an alloy of tin and lead. This alloy should have high specific resistance and low melting point.

34. The word FTP stands for

Correct Answer: (d) File Transfer Protocol
Solution:

The word FTP stands for File Transfer Protocol. It can transfer files between any computers that have an Internet connection and also works between computers using totally different operating system.

35. RAM stands for

Correct Answer: (a) Random Access Memory
Solution:

RAM stands for Random Access Memory. It is also known as read/write memory, that allows CPU to read as well as write data and instructions into it. RAM is used for the temporary storage of input data, output data and intermediate results.

36. Which of the following is also known as brain of computer?

Correct Answer: (d) Central Processing Unit (CPU)
Solution:

Central Processing Unit (CPU) is also known as brain of computer. It consists a set of registers, arithmetic logic unit and control unit, which together interpret and execute instructions in assembly language.

37. A technique in which data is written to two duplicate disks simultaneously, is called

Correct Answer: (a) Mirroring
Solution:

A technique in which data is written to two duplicate disks simultaneously is called mirroring. This way if one of the disk drives fails, the system can instantly switch to the other disk without any loss of data or service. Disk mirroring is used commonly in online database system where it's critical that the data be accessible at all times.

38. The term ‘e-Waste’ refers to

Correct Answer: (c) The electronic products such as mobiles, PCs etc that are disposed off after their useful life
Solution:

The term e-waste refers to the electronic products such as mobiles, PCs, etc that are disposed off after their useful life. While e-waste contains valuable materials such as aluminium, copper, gold, palladium and silver, it also contains harmful substances like cadmium, lead and mercury.

39. CAD stands for

Correct Answer: (a) Computer Aided Design
Solution:

CAD stands for computer Aided Design. It is the use of computers to aid in the creation, modification, analysis, or optimisation of a design. CAD software is used to increase the productivity of the designer, improve the quality of design, improve communication through documentation etc.

40. Match the following.

Correct Answer: (d)
Solution:

Robert Owen contributed for the Industrial welfare movement. He is known for efforts to improve factory working conditions for his workers and promote experimental socialistic communities. Elton Mayo was the propounder of Human Relations Thought. He began his experiments (the Hawthrone studies), to prove the importance of people for productivity-not machines. Charles A. Myers gave the concept of Third Force. Ahmedabad Experiment were done by A. K. Rice. In this experiment the interaction of social and technological changes was studied.