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Likurg_2 [28]
3 years ago
14

3. What is special about beryllium-copper alloy tools?

Engineering
1 answer:
Deffense [45]3 years ago
5 0

Explanation:

Can u help me?

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Air-conditioning principles are being discussed. Technician A states that heat always
Sunny_sXe [5.5K]

Answer: C.

Explanation:

7 0
3 years ago
A team of engineers is tasked with designing a hydraulic engine for a motorboat that is as efficient as possible. Identify three
Rina8888 [55]

Answer:

  • Driving surface area as subject to differential pressures
  • How to achieve continuous rotation
  • Mechanical connections

Explanation:

The general stages of thinking when designing a system are;

  • First understanding the problem that requires you to design a solution
  • Defining the problem that needs to be solved. In this case is to design an efficient hydraulic engine for a motorboat
  • Research to find any available solutions for similar problems
  • Idea of the solution
  • A prototype to try solve the challenge
  • Selecting and adjusting the prototype as you implement the solution.

For a hydraulic engine design, the following designing parts are vital;

  • Driving surface area as subject to differential pressures
  • How to achieve continuous rotation
  • Mechanical connection

Pressures are important due to motor displacements. Fuel burns in the cylinder to cause power through fuel gases burning and expansion which is the four-stroke cycle. Continuous rotation will come in the design considerations through reciprocating motions of pistons into rotary motions. Mechanical connections are vital especially in crank shaft turns, gear box that turns horizontal motions to spinning motions and finally the propeller that drives the boat on the water.

7 0
3 years ago
50. You are not permitted to work on any equipment or machinery at any time if the
dexar [7]
I assume this is a wood shop question:

You may not work on any equipment if the TEACHER is not present in the room.
7 0
4 years ago
In a vapor-compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at -10°C. The refrigerant enters the
sergij07 [2.7K]

Answer:  (a) 0,142 (b) 52.99 (c) 2.83 (d) 88.26

Explanation:

If the refrigarating capacity is 150kw

(a) the mass flow rate of refrigerant, in kilograms per second  is 0.142

(b) the power input to the compressor, in kilowatts is 52.99

(c) the coefficient of performance is 2.83

(d) the isentropic compressor efficiency is 68.6 per cent

8 0
3 years ago
A specimen of a 4340 steel alloy with a plane strain fracture toughness of 54.8 MPa (50 ksi ) is exposed to a stress of 2023 MPa
Neko [114]

Answer:

Explanation:

The formula for critical stress is

\sigma_c=\frac{K}{Y\sqrt{\pi a} }

\sigma_c =\texttt{critical stress}

K is the plane strain fracture toughness

Y is dimensionless parameters

We are to Determine the Critical stress

Now replacing the critical stress with 54.8

a with 0.2mm = 0.2 x 10⁻³

Y with 1

\sigma_c=\frac{54.8}{1\sqrt{\pi  \times 0.2\times10^{-3}} } \\\\=\frac{54.8}{\sqrt{6.283\times10^{-4}} } \\\\=\frac{54.8}{0.025} \\\\=2186.20Mpa

The fracture will not occur because this material can handle a stress of 2186.20Mpa  before fracture. it is obvious that is greater than 2023Mpa

Therefore, the specimen does not failure for surface crack of 0.2mm

4 0
3 years ago
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