RRB JE Mechanical Question Paper 2014 (Set-3) with Answer Key

1) The cutting speed of a tool refers to

Answer is:

rate at which cutting edge of the tool passes over the surface of work piece

Explanation:

.

2) Comparative scale is a pair of scale having a common

Answer is:

representative fraction

3) A tap can fill a tank in 16 minutes and another can empty it in 8 minutes. If the tank is already half full and both the taps are opened together, the tank will be

Answer is:

emptied in 8 minutes

Explanation:

If a pipe can fill a tank in x hours and another pipe can empty the full tank in y hours (where x > y), then on opening both the pipes, the net part emptied in 1 hour = (1/y)-(1/x)
= (1/8 - 1/16) = 1/16
Time taken to empty the full tank = 16 min.
Hence, time taken to empty the half tank = 8 min

4) Which of the following is the main factor of water pollution?

Answer is:

Industrial waste

5) Who was the ruler of India when the East India Company was set up?

Answer is:

1) The cutting speed of a tool refers to

rate at which cutting edge of the tool passes over the surface of work piece

2) Comparative scale is a pair of scale having a common

representative fraction

3) A tap can fill a tank in 16 minutes and another can empty it in 8 minutes. If the tank is already half full and both the taps are opened together, the tank will be

emptied in 8 minutes

4) Which of the following is the main factor of water pollution?

Industrial waste

5) Who was the ruler of India when the East India Company was set up?

Jahangir