Which part does NOT rotate when the engine is running and the clutch pedal is depressed?

Which substance(s) have no fixed shape and no fixed volume?

Black_prince [1.1K]

Answer:

I think gas substances

5 0

4 years ago

Read 2 more answers

What are the general principles of DFA? What are the steps to minimize the number of parts for an assembly?

BigorU [14]

Answer Explanation : The general principles for design for assembly (DFA) are,

MINIMIZE NUMBER OF COMPONENT
USE STANDARD COMMERCIALLY AVAILABLE COMPONENTS
USE COMMON PARTS ACROSS PRODUCT LINES
DESIGN FOR EASE OF PART FABRICATION
DESIGN PARTS WITH TOLERANCE THAT ARE WITHIN PROCESS CAPABILITY
MINIMIZE USE OF FLEXIBLE COMPONENT
DESIGN FOR EASE OF ASSEMBLY
USE MODULAR DESIGN
REDUCE ADJUSTMENT REQUIRED

STEPS TO MINIMIZE THE NUMBER OF PARTS

USE OF INCORPORATE HINGS
USE OF INTEGRAL SPRINGS
USE OF SNAP FITS
USE OF GUIDES BEARINGS
USE OF COVERS

6 0

3 years ago

For a metal casting with a cylindrical riser, what is the best (optimal) aspect ratio (aspect ratio is the ratio of the riser's

DochEvi [55]

Answer:

Optimal aspect ratio = 1

Explanation:

From Chvorinov's Rule,

$T = c [\frac{volume}{surface are}]^n$

Where

T = solidification time

c = mold constant

$Volume = \frac{pi D^2 h}{4}$

$Surface areaA= pi Dh[\frac{2pi D^2}{4}$

For the riser to have the longest solidification time:

We have: D = h

$V = \frac{pi D^3}{4}$

$A = pi Dh[\frac{2pi D^2}{4}] = 1.5D^2 pi$

Therefore,

$\frac{V}{A} = \frac{\frac{pi D^3}{4}}{1.5D^2 pi}$

$\frac{V}{A} = \frac{D}{6}$

To have to longest solidification time, D = h

Therefore the best aspect ratio would be,

$\frac{D}{h} = 1$

3 0

3 years ago

MITM can present in two forms: eavesdropping and manipulation. Discuss the process involved when an attacker is eavesdropping an

Nikitich [7]

Answer / Explanation:

Eavesdropping attack is also sometimes refereed to as sniffing attack. It is simply the process by which an attacker or hacker tries to penetrate very suddenly into an unaware individuals network or server with the intention to steal information transmitted over the network or server through that computer.

To prevent such attack, there are several mean which include installing network monitoring software to check who else is connected to the network but the most common method of preventing such attack is to encrypt the Hypertext Transfer Protocol (http) and the way to do this is by securing it with a sort of security key.

On installing the security key, the network becomes encrypted and secured such that whatever network transmitted over the network becomes encrypted and unable to read. The protocol then converts to (https).

5 0

3 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