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Post by sherrie on Sept 30, 2009 8:19:24 GMT
taking ntta exam. reading Hiller's fundamentals. could anyone give any other advice? thankyou could anyone help me understand "swage in the bonnet" sorry but am confused after reading about it on here. Also could anyone tell me what normal hydraulic brake fluid is? thankyou so much for your help
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scoot
Nominated Tester
Posts: 305
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Post by scoot on Sept 30, 2009 16:21:43 GMT
Hi sherrie,a swage on a bonnet is wen a bonnet has a bulge on it,not a normal shape bonnet,it rises in middle ,not sure wat u mean wen you say normal hydraulic brake fliud is?
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Post by sherrie on Sept 30, 2009 16:39:05 GMT
thankyou there is a question someone put on line "normal hydraulic brake fuild is" a) high detergent mineral oil b) low viscosity mineral oil c) high viscosity mineral oil d) none i thought it was b but then thought it was none of the above as is it not synthetic?
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scoot
Nominated Tester
Posts: 305
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Post by scoot on Sept 30, 2009 19:18:36 GMT
I would say its c,read your hilliers sherrie will be in that.
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graham
Nominated Tester
Posts: 331
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Post by graham on Sept 30, 2009 22:33:34 GMT
I would say its c,read your hilliers sherrie will be in that. Isn't high viscosity mineral oil a "thick" oil near to grease. Brake fluid is low viscosity to get through small bore pipes.
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Post by sherrie on Oct 1, 2009 7:25:55 GMT
read book again. know loads of it but learnt lots again. it is b thanks everyone feel much better now going for exam. Think ive read up that much i just went brain dead instead of stopping and thinking. it all seems like common sense if you know your stuff, just need to brush up. Again thanks everyone and good luck to anyone taking exam x
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Post by sherrie on Oct 1, 2009 7:31:29 GMT
by the way found out what a Swage on a bonnet is. I had not heard of it as we always refered to it differently. anyone doing test dont do what i did and look on here for answers go through book or look up on internet Thanks all x x by the way thankyou you graham x
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scoot
Nominated Tester
Posts: 305
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Post by scoot on Oct 1, 2009 16:25:24 GMT
was wrong on brake fluid stand corrected should have known that,but sure iam right on a swage?
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Post by sherrie on Oct 4, 2009 8:57:33 GMT
thanks but learnt my leason. sometimes think its never good to try get help, but then you only know what you know and i guess you learn all the time. gettin nervous now but only can do best on day.
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Daveg
NT & VTS Council member
I believe I am perfect, but others may differ in opinion?
Posts: 1,549
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Post by Daveg on Oct 19, 2009 19:02:34 GMT
thankyou there is a question someone put on line "normal hydraulic brake fuild is" a) high detergent mineral oil b) low viscosity mineral oil c) high viscosity mineral oil d) none i thought it was b but then thought it was none of the above as is it not synthetic?
Hi Sherrie
To answer the question you ask it may be beneficial to carry out a bit of research into what the subject is about, this is the best way to learn and then you are not bombarded with numerous differing opinions and left hanging in the balance of saying, which or who is right?
The question you ask is referring to viscosity of brake fluid, first you must understand what viscosity actually means?
Viscosity is a measure of the resistance of a fluid to flow when it is subjected to a shear stress. What you question is asking is whether the viscosity of brake fluid is HIGH or LOW?
If you take the top of the bottle of brake fluid and pour it into the brake fluid reservoir, do you have to wait for the brake fluid to react before it starts pouring into the reservoir, or does it flow immediately?
If the brake fluid does not move immediately, then that shows the fluid has a HIGH resistance to the flow and therefore must be THICK fluid, ie grease.
If the brake fluid moves quite readily, ie immediately, then that fluid shows that the viscosity has a LOW resistance to the flow and therefore must be a THIN fluid, ie like water.
In summary, brake fluid must not offer a high resistance to movement otherwise the brakes would not be applied when you press the brake pedal?
When the brake pedal is depressed, the force applied increases the energy transfer through the hydraulic system where the brake fluid has very little movement, ie undiminished.
One can never do enough reading about a subject they are new to, the question is where to start, and the best answer to that one is Fundamentals of Motor Vehicle Engineering.
Dave
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immy
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Post by immy on Oct 20, 2009 20:29:57 GMT
this message is for glen i cant seem to find email
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