Question – 1
1. When fuel is mixed with air by the fuel system, the particles of the fuel are___________.
- A. randomized
- B. atomized
- C. minimized
- D. compressed
- Answer:B
- Answer Explanation:
Question – 2
2. A typical rich air-fuel mixture is __________.
- A. 1: 10
- B. 7: 10
- C. 10: 1
- D. 10: 7
- Answer:C
- Answer Explanation:
Question – 3
3. ___________ takes place when an engine’s air-fuel mixture is lean.
- A. Detonation
- B. Depression
- C. Impression
- D. Preignition
- Answer:A
- Answer Explanation:
Question – 4
4. A __________ is utilized by the diesel engine.
- A. spark ignition system
- B. low compression ratio
- C. high compression ratio
- D. carburetor
- Answer:C
- Answer Explanation:
Question – 5
5. What is the role of antifreeze in an engine coolant?
- A. It lowers the boiling point of the coolant
- B. It raises the boiling point of the coolant
- C. It raises the freezing point of the coolant
- D. It lowers the corrosion resistance of the coolant
- Answer:B
- Answer Explanation:
Question – 6
6. Which of the following controls the electronic fuel injectors?
- A. Fuel pressure regulator
- B. Electric fuel pump
- C. Ignition switch
- D. Powertrain control module
- Answer:D
- Answer Explanation:
Question – 7
7. What are the two basic types of wrenches?
- A. The open end and the box end
- B. The open end and the close end
- C. The start end and close end
- D. None of the above
- Answer:A
- Answer Explanation:
Question – 8
8. A veining bit is used in a _________ to cut fine lines in materials, often for decorative purposes.
- A. hand drill
- B. electric saw
- C. drill press
- D. router
- Answer:D
- Answer Explanation:
Question – 9
9. _________ to stop a board from chipping on the end as you plane.
- A. At the end of the board insert a nail to hold it together
- B. A piece of wood can be nailed to the end of the board as an extension of the board
- C. After planing, cut off the end
- D. After finishing, glue the chipped pieces back
- Answer:B
- Answer Explanation:
Question – 10
10. _________ is a process that joins metals by bonding a metal alloy to their surfaces.
- A. Planing
- B. Smoothing
- C. Soldering
- D. Shaping
- Answer:C
- Answer Explanation:
Question – 11
11. __________ are used when it is necessary to disassemble a component by hand.
- A. Electric saws
- B. Cotter pins
- C. Lock nuts
- D. Wing nuts
- Answer:D
- Answer Explanation:
Question – 12
12. UNF stands for which one of the thread classifications?
- A. Unified National Fine
- B. Unified National Fund
- C. United National Fund
- D. United Name Fine
- Answer:A
- Answer Explanation:
Question – 13
13. ___________ is used to loosen a bolt with a hexagonal head.
- A. A box-end wrench
- B. A12-point socket and ratchet
- C. An open-end wrench
- D. All of the above
- Answer:D
- Answer Explanation:
Question – 14
14. The threaded fasteners that are 1/4 inch or more in diameter are known as ________.
- A. Nuts
- B. Machine screws
- C. Bolts
- D. Rivets
- Answer:C
- Answer Explanation:
Question – 15
15. ___________ are electronically connected to EFI computer.
- A. Carburetors
- B. Injectors
- C. Throttles
- D. Radiators
- Answer:C
- Answer Explanation: