Mechanical Engineering Questions And Answers

41⟩ Where do you put the oil in a compressor?

In the reciprocating compressors, you fill the crankcase with the lubricante.

In screw compressors, there is a reservoir to separate oil from compressed air, that reservoir works as the oil sump of the screw compressor.

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42⟩ How do you repair a hydraulic jack?

In general, it seems simple: polishing scored cylinders and pistons, replacing worn seals, replacing excessively worn or damaged parts, etc. However, for an ordinary person, the problem I have run into is finding a readily accessible source of parts, as the hydraulic repair industry seems to be a closed fraternity.

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43⟩ Is it possible for something to explode in space like in the movies?

Yes, provided there is an oxygen source. A spaceship with liquid hydrogen and liquid oxygen will blow up quite well in the vacuum of space. Chemical explosives will also explode in space since they function by breaking weakly bonded chemical components; no oxygen is necessary. Nuclear explosions can of course occur in space, too. The United States military in the 60's performed a series of nuke tests in outer space, and found out what EMP can do, when they briefly wiped out Hawaii's electrical grid for a few hours.

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44⟩ How do motion detectors work?

Motion detectors work to help with construction work.

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45⟩ How do you determine what suction pressure should be in R22 air conditioning compressors suction line?

The type of refrigerant used and sometimes the amount of charge determines the proper suction pressure of any air conditioning or refrigeration system.

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46⟩ If the black box flight recorder is never damaged during a plane crash, why not the whole airplane made out of that stuff?

The SR-71 was made mostly out of Titanium (very high strength to weight ratio) and it got off the ground fine. In addition, a two-seat airplane cost $33 million in 1960s dollars, so no one would ever be able to afford an airliner made out of it.

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47⟩ What is a feasibility study?

In order to make wise investments in a marketplace experiencing increasing levels of risk, companies are turning to feasibility studies to determine if they should offer new products, services or undertake a new business endeavor. The purpose of a feasibility study is to determine if a business opportunity is possible, practical, and viable. When faced with a business opportunity, many optimistic people tend to focus on just the positive aspects.

A feasibility study enables a realistic view at both the positive and negative aspects of the opportunity. A feasibility study is an important tool for making the right decisions. A wrong decision often leads to business failure. For example, only 50% of start-ups are still in business after 18 months and only 20% are in business after 5 years.

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48⟩ What is the most important, or helpful,project that you have contributed to?

I hope this one. The solar-sourced power plant.

Its up to you to show what is your the most important and helpful project...

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49⟩ What are the minerals needed to make or build a car?

* a) Sulfur is used in tire construction

* b) Aluminum and iron in the car body and engine

* c) Quartz is used in windshield construction

* d) Chromium is used for chrome plating

* e) Copper is used in wiring

* f) Magnesium may be used in the wheels

* g) Zinc would be used in rust plating

* h) Gold may be used in the spark plugs and in electrical connections

* i) Tin may be used in solder

* j) Lead will be used in the batteries

* k) Tungsten may be used in the light bulb filaments

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50⟩ What is 1810 stainless steel?

1810 Stainless Steel is the European grade that is equivalent to AISI 304 Stainless Steel. It is the most common stainless steel going. Here is the rundown:

Fe, <0.08% C, 17.5-20% Cr, 8-11% Ni, <2% Mn, <1% Si, <0.045% P, <0.03% S

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51⟩ How many years did it take for you to complete school?

Express your details like this.

I did it in 4 years for undergraduate (summers included) and 2 more for Masters Degree, part time.

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52⟩ Did you have a favorite project that you had to do while in school?

I worked on a ground coupled heat pump project that I really liked. Very interesting stuff, and environmentally worth it.

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53⟩ Where do you work in Engineering company?

Presently, I work for an Engineering company designing a solar-sourced power plant. I am building a computer model of it. Pretty neat, huh?

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54⟩ What are some of the projects you are currently working on in Engineering?

Besides the computer model, I have been working on some pump selection/purchases, and some system designs.

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55⟩ What was the hardest class in Engineering you had to take?

Engineering Circuit Analysis. I don't do well with that stuff.

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56⟩ Is there a high demand for mechanical engineers right now?

I would say that there is, because the economy is up and companies are spending more money.

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57⟩ Does the rate increase by experience or number of years worked?

absolutely Yes to both.

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58⟩ How many mechanical engineers work with you at your place of employment?

There must be about 20 or so? Not sure.

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59⟩ What is the average salary rate in mechanical engineering job?

Depending on where in the country you work, I earn around $80,000 permanent employment, or $100,000 contract.

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60⟩ When did you decide to become and mechanical engineer and why?

Good question. I decided to become a Mechanical Engineer during my first semester. It just seemed to fit the things I enjoyed.

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Mechanical Engineering

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164 Mechanical Engineering Questions And Answers

41⟩ Where do you put the oil in a compressor?

42⟩ How do you repair a hydraulic jack?

43⟩ Is it possible for something to explode in space like in the movies?

44⟩ How do motion detectors work?

45⟩ How do you determine what suction pressure should be in R22 air conditioning compressors suction line?

46⟩ If the black box flight recorder is never damaged during a plane crash, why not the whole airplane made out of that stuff?

47⟩ What is a feasibility study?

48⟩ What is the most important, or helpful,project that you have contributed to?

49⟩ What are the minerals needed to make or build a car?

50⟩ What is 1810 stainless steel?

51⟩ How many years did it take for you to complete school?

52⟩ Did you have a favorite project that you had to do while in school?

53⟩ Where do you work in Engineering company?

54⟩ What are some of the projects you are currently working on in Engineering?

55⟩ What was the hardest class in Engineering you had to take?

56⟩ Is there a high demand for mechanical engineers right now?

57⟩ Does the rate increase by experience or number of years worked?

58⟩ How many mechanical engineers work with you at your place of employment?

59⟩ What is the average salary rate in mechanical engineering job?

60⟩ When did you decide to become and mechanical engineer and why?

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Mechanical Engineering

Home Engineering Mechanical Engineering

164 Mechanical Engineering Questions And Answers

41⟩ Where do you put the oil in a compressor?

42⟩ How do you repair a hydraulic jack?

43⟩ Is it possible for something to explode in space like in the movies?

44⟩ How do motion detectors work?

45⟩ How do you determine what suction pressure should be in R22 air conditioning compressors suction line?

46⟩ If the black box flight recorder is never damaged during a plane crash, why not the whole airplane made out of that stuff?

47⟩ What is a feasibility study?

48⟩ What is the most important, or helpful,project that you have contributed to?

49⟩ What are the minerals needed to make or build a car?

50⟩ What is 1810 stainless steel?

51⟩ How many years did it take for you to complete school?

52⟩ Did you have a favorite project that you had to do while in school?

53⟩ Where do you work in Engineering company?

54⟩ What are some of the projects you are currently working on in Engineering?

55⟩ What was the hardest class in Engineering you had to take?

56⟩ Is there a high demand for mechanical engineers right now?

57⟩ Does the rate increase by experience or number of years worked?

58⟩ How many mechanical engineers work with you at your place of employment?

59⟩ What is the average salary rate in mechanical engineering job?

60⟩ When did you decide to become and mechanical engineer and why?

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