Question

1. illustrations are an essential part of a service manual.
2. the vin is usually found on the dashboard.
3. a seal is used to prevent leakage between a stationary part and a moving part.
4. the only way to remove a broken bolt is to \drill it out.\
5. in automotive work, bolts and nuts are often named after the parts they hold.
6. when installing a gasket, all fasteners should be hand - tightened before a wrench is applied.
7. an o - ring seal should never be exposed to oil or other engine fluids.
8. if examination reveals rusty engine coolant, the system should be drained and filled with new coolant.
9. a tool used to measure very small part movements is a dial indicator.
10. the combustion chamber is located directly above the piston.
11. mechanical (solid) valve lifters produce a clatter, or clicking noise, as the valves operate.
12. a crank sprocket is usually mounted on the camshaft.
13. the most common size ratchet is 3/8\.
14. an active sensor is one that generates its own voltage signal.
15. obd ii requires all automotive manufacturers to use a set of standardized trouble codes.
16. gasoline engine compression pressures are typically higher than those of diesel engines.

matching worth 27 marks.
match the following terms and identifying phrases. put the corresponding letter in the space beside the number.
a. lock washer\td. rtv silicone
b. nut\te. cotter pin
c. tap\tf. cap screw

1. fastener with internal threads.
2. safety device used with slotted nut.
3. gasket - forming material used on flexible flanges.
4. tool for cutting threads in a hole.
5. device used to prevent loosening of nuts because of vibration.
6. another name for a bolt.

Explanation:

1. A nut has internal threads. So the answer for 60 is b. nut.
2. A cotter - pin is a safety device used with slotted nuts. So the answer for 61 is e. cotter pin.
3. RTV silicone is a gasket - forming material used on flexible flanges. So the answer for 62 is d. RTV silicone.
4. A tap is a tool for cutting threads in a hole. So the answer for 63 is c. tap.
5. A lock washer is used to prevent loosening of nuts because of vibration. So the answer for 64 is a. lock washer.
6. A cap screw is another name for a bolt. So the answer for 65 is f. cap screw.

Answer:

1. b. nut
2. e. cotter pin
3. d. RTV silicone
4. c. tap
5. a. lock washer
6. f. cap screw