Mechanic questions...need helps!!?

1. While troubleshooting an engine in a car with a low oil pressure warning light illuminated, two technicians remove the oil pressure sender and install an oil pressure gage. They then start the engine and observe that the oil pressure gage indicates the correct amount of oil pressure. Technician A says these test results indicate that the pressure-relief valve is defective. Technician B says these test results indicate that the engine bearings have excessive clearance. Which of the following statements is correct?

A. Only Technician A is correct.

B. Only Technician B is correct.

C. Both Technician A and Technician B are correct.

D. Neither Technician A nor Technician B is correct.

2. The manufacturer of a particular vehicle recommends an oil change every 7,500 miles, or every 12 months, whichever comes first. Assuming that the vehicle was purchased new and was driven for a total of 16,000 miles, how many oil changes should the vehicle have had during its first year?

A. 1

B. 2

C. 3

D. 4

3. An auto technician is performing a pressure test on a cooling system. During the test, the cooling system was pressurized to the rated pressure of the pressure cap. Then, the tester gage was observed for a period of about two minutes. During this time, the pressure gage on the system dropped from the rated pressure to zero. Based on your knowledge of automotive cooling systems, what do the test results indicate?

A. The pressure cap is defective.

B. There's a leak in the cooling system.

C. The coolant recovery system is defective.

D. The system is working properly.

9. Two auto technicians are discussing automotive oil filters. Technician A says that an oil filter usually contains a bypass valve that allows oil to flow through the filter if the filter becomes blocked. Technician B says that the bypass valve in an oil filter is used to control the amount of oil pressure in the lubrication system. Which of the following statements is correct?

A. Only Technician A is correct.

B. Only Technician B is correct.

C. Both Technician A and Technician B are correct.

D. Neither Technician A nor Technician B is correct.

10. A customer tells you that his vehicle is consuming approximately a quart of oil for every 1,000 miles that it's driven. Based on your knowledge of lubrication systems, what does this condition indicate?

A. The engine has worn bearings.

B. The oil pressure is too high.

C. The piston rings of the engine are worn.

D. The lubrication system is operating normally.

11. Two automotive technicians are troubleshooting a problem in a vehicle's cooling system. During the troubleshooting process, the technicians remove the thermostat from the vehicle. Upon inspection at room temperature (70 degrees Fahrenheit), the technicians see that the thermostat is fully open. Technician A says that the thermostat is working properly. Technician B says that the thermostat will close completely once the surrounding temperature reaches the thermostat's temperature rating. Which of the following statements is correct?

A. Only Technician A is correct.

B. Only Technician B is correct.

C. Both Technician A and Technician B are correct.

D. Neither Technician A nor Technician B is correct.

24. Two auto technicians are discussing the problem of low oil pressure. Technician A says that low oil pressure can be caused by an air leak in the pickup tube. Technician B says that low oil pressure can be caused by excessive bearing clearances. Which of the following statements is correct?

A. Only Technician A is correct.

B. Only Technician B is correct.

C. Both Technician A and Technician B are correct.

D. Neither Technician A nor Technician B is correct.

BTW...

how do you find the freezing point of a typical coolant by looking at at its pic. P.S the pic shows degrees in Fahrenheit, from top to bottom +10, 0, -7, -20, -34, and -45. In addition, it also says :

(-34 Fahrenheit) 50% concentration recommended (-37 Celsius)



Having the correct answers for these questions are very significant to me.... so PLEASE! If you can lend me a helping hand... i will appreciate it sooooo much~!!Mechanic questions...need helps!!?
Answer to first question - find new techs , but first change the sending unit . If still low pressure , will need to change gauge .

Second question - should be at least 2 oil changes .

Third question - either tester gauge bad or leak in system

Fourth question - again find new techs - 1 the relief valve is not always in the filter as on some engines it is in the filter housing- 2 relief valve is just that . It relieves excessive pressure .

Fifth question - all of the above or any one of the above

Sixth question - need new techs again . At room temp , stat should be closed and opens slowly as temp goes up

Seventh question - hey , you finally found 2 correct answers

Eighth question -Actually all of those temps could be freeze point depending on the concentration of anti-freeze to water ratio . Most manufacturers recommend a 50/50 concentration , but you need to adjust that depending on where you live .Mechanic questions...need helps!!?
D, B, B, C, C, D, C. You really ought to do your own homework, though!!!!