Hfcl Infotel Ltd Interview Questions And Answers

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Objective type questions in written exam test of Hfcl Infotel Ltd

1 → Questins : The kinetic energy (KE) of a body is given by the equation

[3BA_31_q.jpg]

The potential energy (PE) of a body depends on its height above an arbitrary base line.

A ball is dropped from a height of 5 metres. Which of these correctly shows its kinetic energy at different heights?

2 → Questins : Osmosis is the passage of water from a solution of low solute concentration to one with high solute concentration, across a semi-permeable membrane.

The typical cell cytoplasm has a high concentration of solutes. Upon what treatment will the cell shown in Figure 1 become like the one in Figure 2?

[3BA_32_q.jpg]

Option a> : placing the cell in distilled water
Option b> : placing the cell in concentrated salt solution
Option c> : placing the cell in cooking oil
Option d> : (The cell in figure 1 cannot become like the one in figure 2.)

3 → Questins : If there were no air resistance, which of these correctly shows the shape of the path taken by a solid object dropped from a moving aeroplane?

[3BA_33_q.jpg]

Option a> :
Option b> :
Option c> :
Option d> :

4 → Questins : The graph given shows the effectiveness of a pesticide, DDT, in killing mosquitoes at various points in time.

At each time indicated below, a certain number of mosquitoes were captured and treated with a standard dose of DDT for 1 hour. The percentage of bacteria killed was noted.

[3BA_34_q.jpg]

Which of these is a valid conclusion from this graph?

Option a> : The mosquito population keeps falling with the use of DDT over time.
Option b> : The space over which DDT is effective remains the same with time.
Option c> : Mosquitoes are probably building resistance to DDT over time.
Option d> : Almost all the mosquitoes are killed by the end of the 16th month.

5 → Questins : A ^phylogenetic^ tree predicts evolutionary relationships between organisms based on studying their DNA sequences.

[3BA_35_q.jpg]

According to this phylogenetic tree of land plants, which of these plants are most distantly related?

Option a> : Mosses and Liverworts
Option b> : Gnetophytes and Cycads
Option c> : Cycads and Conifers
Option d> : Angiosperms and Ferns

6 → Questins : Unlike pure metals, alloys do not have a clear melting point. Depending on their composition (depicted on the horizontal axis in the figure), they have a melting range. For example an alloy with 30% tin and 70% lead starts melting at 183°C, but melts completely only at about 250°C. Questions 36 and 37 are based on this.

[3BA_36_q.jpg]

At what composition (called the eutectic composition) does the alloy completely melt most easily?

Option a> : 52% tin and 48% lead
Option b> : 62% tin and 38% lead
Option c> : 82% tin and 18% lead
Option d> : 90% tin and 10% lead

7 → Questins : Unlike pure metals, alloys do not have a clear melting point. Depending on their composition (depicted on the horizontal axis in the figure), they have a melting range. For example an alloy with 30% tin and 70% lead starts melting at 183°C, but melts completely only at about 250°C. Questions 36 and 37 are based on this.

[3BA_36_q.jpg]

What is the melting point of Tin?

Option a> : 327°C
Option b> : 232°C
Option c> : 183°C
Option d> : 144°C

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