automotive knowledge test*come play*
02-25-2003, 02:35 PM
#1
automotive knowledge test*come play*
ok guys, heres 20 questions, they are pretty tough.
the rules are DO NOT POST THE ANSWERS HERE AT ANY TIME! that ruins the fun for people after you.
instead, take this and paste it into a PM and answer them, send it off to me, and Ill post your score up here.
I REPEAT DO NOT POST THE ANSWERS IN THIS THREAD!
and also try not to cheat by looking up the answers. these are meant to be extremely difficult, dont feel bad if you dont know many. I got 9/20 right.
1) A common tire size is 195 / 60 – 15. What do each of the numbers represent?
2) What is an “Apex Seal”?
3) How do you calculate a compression ratio?
4) If Pete replaces his 65/55-watt headlight bulbs with 100/90-watt bulbs, how much additional current will be required of his car'selectrical system when his high beams are on?
5) What does in mean when a car “tends to push”?
6) What component, besides the ignition system, can shock you?
7) What is the most generic name for the system used by a gas, internal combustion engine?
8) What is it called when a car’s tires are leaned in toward the center of the vehicle?
9) What is the point in cross drilling or slotting brake rotors?
10) If one increases the width of their tires by 10% without changing the tire make, model, or air pressure, how much of a traction increase can be expected?
11) What does it mean if a window is tinted with 30% tint?
12) What are the generic symptoms of a car that is “running fat”?
13) What does white smoke out of the exhaust pipe generally denote?
14) Generally, what property of a bolt is being exploited with a torque spec.?
15) If a motor is turning at 4000 rpm, how fast is the distributor rotor turning?
16) If a car is stuck in the snow, and the driver guns it, and one wheel spins, and the other doesn’t rotate at all. How fast is the spinning wheel rotating if the speedo indicates 15 mph?
17) What are the basic differences between performance cams for turbo and NA applications?
18) If two 10”, 4 ohm subs are wired in parallel, what would the resultant ohm load to the amplifier be? (Please ignore frequency variations)
19) When a crank is “forged” what is different about it?
20) Most gas engines are only about 30% efficient. Where does the majority of the remaining 70% of the energy go?
the rules are DO NOT POST THE ANSWERS HERE AT ANY TIME! that ruins the fun for people after you.
instead, take this and paste it into a PM and answer them, send it off to me, and Ill post your score up here.
I REPEAT DO NOT POST THE ANSWERS IN THIS THREAD!
and also try not to cheat by looking up the answers. these are meant to be extremely difficult, dont feel bad if you dont know many. I got 9/20 right.
1) A common tire size is 195 / 60 – 15. What do each of the numbers represent?
2) What is an “Apex Seal”?
3) How do you calculate a compression ratio?
4) If Pete replaces his 65/55-watt headlight bulbs with 100/90-watt bulbs, how much additional current will be required of his car'selectrical system when his high beams are on?
5) What does in mean when a car “tends to push”?
6) What component, besides the ignition system, can shock you?
7) What is the most generic name for the system used by a gas, internal combustion engine?
8) What is it called when a car’s tires are leaned in toward the center of the vehicle?
9) What is the point in cross drilling or slotting brake rotors?
10) If one increases the width of their tires by 10% without changing the tire make, model, or air pressure, how much of a traction increase can be expected?
11) What does it mean if a window is tinted with 30% tint?
12) What are the generic symptoms of a car that is “running fat”?
13) What does white smoke out of the exhaust pipe generally denote?
14) Generally, what property of a bolt is being exploited with a torque spec.?
15) If a motor is turning at 4000 rpm, how fast is the distributor rotor turning?
16) If a car is stuck in the snow, and the driver guns it, and one wheel spins, and the other doesn’t rotate at all. How fast is the spinning wheel rotating if the speedo indicates 15 mph?
17) What are the basic differences between performance cams for turbo and NA applications?
18) If two 10”, 4 ohm subs are wired in parallel, what would the resultant ohm load to the amplifier be? (Please ignore frequency variations)
19) When a crank is “forged” what is different about it?
20) Most gas engines are only about 30% efficient. Where does the majority of the remaining 70% of the energy go?
02-25-2003, 04:23 PM
#5
rjsmit1 got 6/20 and 2 questions Ill give half credit on. not a bad effort tho, he got some of the harder ones and missed a few easy ones.
now come on jtree, it wont take but maybe 5 minutes to type a quick answer I dont want an essay.
now come on jtree, it wont take but maybe 5 minutes to type a quick answer I dont want an essay.
Last edited by ares; 02-25-2003 at 04:26 PM.
02-25-2003, 04:38 PM
#6
eric1h got a 7.5. atleast I think, your answer to number 2 was like 20x more complicated than it need be, but sure. you also may have gotten number 1 right, but I had trouble determining what you meant, if its what I think you meant then it was wrong, but I might have interpreted it wrong.
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02-25-2003, 06:17 PM
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Re: automotive knowledge test*come play*
Originally posted by ares
ok guys, heres 20 questions, they are pretty tough.
the rules are PLEASE POST THE ANSWERS HERE AT ANY TIME! Please save the people after you from their ignorance.
I REPEAT PLEASE POST THE ANSWERS IN THIS THREAD!
and also try not to cheat by looking up the answers. these are meant to be extremely difficult, dont feel bad if you dont know many. I got 9/20 right.
1) A common tire size is 195 / 60 – 15. What do each of the numbers represent?
195=section width, or tire width, in millimeters. 60 is the sidewall height as a percentage of section width, i.e. 60% of 195=117, or 4.6". The 15 is wheel diameter.
2) What is an “Apex Seal”?
At each tip, or "apex" of a Wankel's rotor, used to seal off the combustion chamber. 2mm standard, 3mm ceramic is extra-yummy.
3) How do you calculate a compression ratio?
(Volume of combustion chamber + cylinder with piston at BDC)/(volume of combustion chamber with piston at TDC)
4) If Pete replaces his 65/55-watt headlight bulbs with 100/90-watt bulbs, how much additional current will be required of his car'selectrical system when his high beams are on?
100W-65W=35W. Assuming it's not an old 6V car or one of these new fangled 42V things, 35W/12V=~3amps per bulb.
5) What does in mean when a car “tends to push”?
Push=understeer. The dynamics of understeer could fill up a whole chapter in a book. Generally the car doesn't turn, or rotate, as much as it should. Used to protect bad drivers from themselves, as in the 350Z.
6) What component, besides the ignition system, can shock you?
Ummm, bad graphics? Putting a wrench across the battery? Is this some sort of really bad play on words with dampers?
7) What is the most generic name for the system used by a gas, internal combustion engine?
2 stroke or 4? Otto cycle in the case of the latter.
8) What is it called when a car’s tires are leaned in toward the center of the vehicle?
Negative camber
9) What is the point in cross drilling or slotting brake rotors?
'Cuz it don't mean a thing if it ain't got that bl!ng!
10) If one increases the width of their tires by 10% without changing the tire make, model, or air pressure, how much of a traction increase can be expected?
That's a crappy question, any answer is BS.
11) What does it mean if a window is tinted with 30% tint?
You're going to get pulled over in CA.
12) What are the generic symptoms of a car that is “running fat”?
Fuel system tuned too rich, too much fuel, too low A/F ratio, etc.
13) What does white smoke out of the exhaust pipe generally denote? Something's burning - oil, coolant? Coolant smells sweet.
14) Generally, what property of a bolt is being exploited with a torque spec.? Exploited? The poor bolt! In critical components (heads, rods, etc.) total bolt stretch (as an indicator of tension) is more important than torque.
15) If a motor is turning at 4000 rpm, how fast is the distributor rotor turning? 0 if your car doesn't use that crap. Why not just ask about how one adjusts their points?
16) If a car is stuck in the snow, and the driver guns it, and one wheel spins, and the other doesn’t rotate at all. How fast is the spinning wheel rotating if the speedo indicates 15 mph? What type of diff - Torsen, clutch, open?
17) What are the basic differences between performance cams for turbo and NA applications? Lift, duration, overlap.
18) If two 10”, 4 ohm subs are wired in parallel, what would the resultant ohm load to the amplifier be? (Please ignore frequency variations) ASSuming SVC, 2 ohms.
19) When a crank is “forged” what is different about it?
As a method of manufacture, forging a metal generally results in a stronger and lighter piece than does casting.
20) Most gas engines are only about 30% efficient. Where does the majority of the remaining 70% of the energy go? Heat
ok guys, heres 20 questions, they are pretty tough.
the rules are PLEASE POST THE ANSWERS HERE AT ANY TIME! Please save the people after you from their ignorance.
I REPEAT PLEASE POST THE ANSWERS IN THIS THREAD!
and also try not to cheat by looking up the answers. these are meant to be extremely difficult, dont feel bad if you dont know many. I got 9/20 right.
1) A common tire size is 195 / 60 – 15. What do each of the numbers represent?
195=section width, or tire width, in millimeters. 60 is the sidewall height as a percentage of section width, i.e. 60% of 195=117, or 4.6". The 15 is wheel diameter.
2) What is an “Apex Seal”?
At each tip, or "apex" of a Wankel's rotor, used to seal off the combustion chamber. 2mm standard, 3mm ceramic is extra-yummy.
3) How do you calculate a compression ratio?
(Volume of combustion chamber + cylinder with piston at BDC)/(volume of combustion chamber with piston at TDC)
4) If Pete replaces his 65/55-watt headlight bulbs with 100/90-watt bulbs, how much additional current will be required of his car'selectrical system when his high beams are on?
100W-65W=35W. Assuming it's not an old 6V car or one of these new fangled 42V things, 35W/12V=~3amps per bulb.
5) What does in mean when a car “tends to push”?
Push=understeer. The dynamics of understeer could fill up a whole chapter in a book. Generally the car doesn't turn, or rotate, as much as it should. Used to protect bad drivers from themselves, as in the 350Z.
6) What component, besides the ignition system, can shock you?
Ummm, bad graphics? Putting a wrench across the battery? Is this some sort of really bad play on words with dampers?
7) What is the most generic name for the system used by a gas, internal combustion engine?
2 stroke or 4? Otto cycle in the case of the latter.
8) What is it called when a car’s tires are leaned in toward the center of the vehicle?
Negative camber
9) What is the point in cross drilling or slotting brake rotors?
'Cuz it don't mean a thing if it ain't got that bl!ng!
10) If one increases the width of their tires by 10% without changing the tire make, model, or air pressure, how much of a traction increase can be expected?
That's a crappy question, any answer is BS.
11) What does it mean if a window is tinted with 30% tint?
You're going to get pulled over in CA.
12) What are the generic symptoms of a car that is “running fat”?
Fuel system tuned too rich, too much fuel, too low A/F ratio, etc.
13) What does white smoke out of the exhaust pipe generally denote? Something's burning - oil, coolant? Coolant smells sweet.
14) Generally, what property of a bolt is being exploited with a torque spec.? Exploited? The poor bolt! In critical components (heads, rods, etc.) total bolt stretch (as an indicator of tension) is more important than torque.
15) If a motor is turning at 4000 rpm, how fast is the distributor rotor turning? 0 if your car doesn't use that crap. Why not just ask about how one adjusts their points?
16) If a car is stuck in the snow, and the driver guns it, and one wheel spins, and the other doesn’t rotate at all. How fast is the spinning wheel rotating if the speedo indicates 15 mph? What type of diff - Torsen, clutch, open?
17) What are the basic differences between performance cams for turbo and NA applications? Lift, duration, overlap.
18) If two 10”, 4 ohm subs are wired in parallel, what would the resultant ohm load to the amplifier be? (Please ignore frequency variations) ASSuming SVC, 2 ohms.
19) When a crank is “forged” what is different about it?
As a method of manufacture, forging a metal generally results in a stronger and lighter piece than does casting.
20) Most gas engines are only about 30% efficient. Where does the majority of the remaining 70% of the energy go? Heat
02-25-2003, 06:31 PM
#11
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Re: Re: automotive knowledge test*come play*
Originally posted by jzr
So what do I win?
So what do I win?
I was just getting ready to take the quiz
02-25-2003, 06:31 PM
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Re: Re: automotive knowledge test*come play*
Wait a second... I know your name from somewhere... http://www.nsxfiles.com/wurth_dec_02.htm
Michael.
Michael.
I really thought I made it clear enough.... guess not.
02-25-2003, 07:49 PM
#16
mcclaskz 7/20
TBCZ 6 and 2 halves/20
(wanna mention that he is the only one that came up with a correct answer to #6, altho it wouldnt normally be an answer, good call)
jason 12/20, only one thus far to answer 19,2, and 17 right. good job.
#6 is stumping alot of people, but here a hint, it aint the battery, go outside, lick your fingers and grob on, you wont feel a thing. now consider that for a moment.
TBCZ 6 and 2 halves/20
(wanna mention that he is the only one that came up with a correct answer to #6, altho it wouldnt normally be an answer, good call)
jason 12/20, only one thus far to answer 19,2, and 17 right. good job.
#6 is stumping alot of people, but here a hint, it aint the battery, go outside, lick your fingers and grob on, you wont feel a thing. now consider that for a moment.
02-26-2003, 09:37 AM
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Originally posted by ares
#6 is stumping alot of people, but here a hint, it aint the battery, go outside, lick your fingers and grob on, you wont feel a thing. now consider that for a moment.
#6 is stumping alot of people, but here a hint, it aint the battery, go outside, lick your fingers and grob on, you wont feel a thing. now consider that for a moment.
02-26-2003, 09:49 AM
#19
ok, let me clarify this then, static shock is not correct, and is not included, its a bit different than getting shocked from a current. the buildup of charge has nothing to do with the car either, just the air around it.
2003Z got 10/20
so far number 4 is the toughest one that wouldnt possible be considered a trick question, only one person has gotten it right.
number 10 is going to suprise most people, I can tell you its alot less than 10% which is what most people suggest.
no ones managed number 14 either, well one person did I think
15 is stumping everyone, tho some use the excuse that the Z doesnt have one, which is true. but other cars do.
16 is very easy but it is not 15mph as most people seem to think
17 is stumping most everyone
18as well, the audiophiles are getting it
19, while "not cast" is true... and it is stronger, its not really the descriptive answer Im looking for.
20, the fact that many people think 70% of the energy is going to drive train loss is a bit scary... to clarify the question, we are discussing hp at the crank, any loss comes from within the engine, not the driveshaft.
2003Z got 10/20
so far number 4 is the toughest one that wouldnt possible be considered a trick question, only one person has gotten it right.
number 10 is going to suprise most people, I can tell you its alot less than 10% which is what most people suggest.
no ones managed number 14 either, well one person did I think
15 is stumping everyone, tho some use the excuse that the Z doesnt have one, which is true. but other cars do.
16 is very easy but it is not 15mph as most people seem to think
17 is stumping most everyone
18as well, the audiophiles are getting it
19, while "not cast" is true... and it is stronger, its not really the descriptive answer Im looking for.
20, the fact that many people think 70% of the energy is going to drive train loss is a bit scary... to clarify the question, we are discussing hp at the crank, any loss comes from within the engine, not the driveshaft.
02-26-2003, 10:58 AM
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#4 can't properly be answered without specifying whether the headlight design keeps low beams on when the highs are activated. Some do, some don't.
In reference to #9:
http://corner-carvers.com/altimathread.php.html
No matter what answer you provide for #10 it's wrong. You can't predict the effects of an increase in tire width without knowing wheel width, vehicle suspension parameters, tire construction and compound and pressure and temperature, direction of perceived traction increase, and surface upon which this "traction" will be measured. Even then you won't know without specific experimentation with those variables controlled, and the answer is bound to vary largely from case to case.
#15 2 stroke motor or 4? In a regular 4 stroke piston engine the crank makes two revolutions for every 4 stroke cycle, so in that case 2000rpm.
#16 30mph in the case of an open rear or front diff. ASSuming again a 2wd vehicle. Since only 2 wheels are mentioned who knows what we've got?
My answer for #17 is incomplete at best. But like #10 and many of the other questions, it's too general to elicit a good response.
But what do I know, I got a D-
In reference to #9:
http://corner-carvers.com/altimathread.php.html
No matter what answer you provide for #10 it's wrong. You can't predict the effects of an increase in tire width without knowing wheel width, vehicle suspension parameters, tire construction and compound and pressure and temperature, direction of perceived traction increase, and surface upon which this "traction" will be measured. Even then you won't know without specific experimentation with those variables controlled, and the answer is bound to vary largely from case to case.
#15 2 stroke motor or 4? In a regular 4 stroke piston engine the crank makes two revolutions for every 4 stroke cycle, so in that case 2000rpm.
#16 30mph in the case of an open rear or front diff. ASSuming again a 2wd vehicle. Since only 2 wheels are mentioned who knows what we've got?
My answer for #17 is incomplete at best. But like #10 and many of the other questions, it's too general to elicit a good response.
But what do I know, I got a D-
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