12. identify the parts of the machinist’s vise in the following illustration.
image of a machinists vise with labels a, b, c, d
13. if a flywheel holder is not available, a(n) ______ can be used to hold the flywheel while the flywheel nut is removed.
14. on a severely worn engine, a(n) ______ may need to be used to shave the top portion of the cylinder before the piston can be removed.
15. a ring spreader must be used to install new rings because ______.
a. the rings are under so much tension they cannot be spread by hand
b. the ring spreader cuts the ring groove so the rings will fit better
c. the rings may become distorted if they are installed by hand
d. none of the above.
16. a ring compressor is used to ______.
a. compress the rings so they will not catch on the wear ridge when the piston is removed
b. reshape distorted rings so they can be reused
c. clean carbon out of the ring groove so the rings seat properly
d. none of the above.
17. true or false? a glaze breaker is used to remove cylinder taper during an engine rebuild.
18. ______ are test instruments used to measure engine speed.
19. a spark tester must be connected between the spark plug wire and a(n) ______ part of the engine.
20. a compression tester measures the ______.
a. distance traveled by the piston
b. maximum air pressure created in the cylinder
c. amount of valve lift
d. none of the above.

copyright goodheart-willcox co., inc.
may not be reproduced or posted to a publicly accessible website.

Question

12. identify the parts of the machinist’s vise in the following illustration.
image of a machinists vise with labels a, b, c, d
13. if a flywheel holder is not available, a(n) ______ can be used to hold the flywheel while the flywheel nut is removed.
14. on a severely worn engine, a(n) ______ may need to be used to shave the top portion of the cylinder before the piston can be removed.
15. a ring spreader must be used to install new rings because ______.
    a. the rings are under so much tension they cannot be spread by hand
    b. the ring spreader cuts the ring groove so the rings will fit better
    c. the rings may become distorted if they are installed by hand
    d. none of the above.
16. a ring compressor is used to ______.
    a. compress the rings so they will not catch on the wear ridge when the piston is removed
    b. reshape distorted rings so they can be reused
    c. clean carbon out of the ring groove so the rings seat properly
    d. none of the above.
17. true or false? a glaze breaker is used to remove cylinder taper during an engine rebuild.
18. ______ are test instruments used to measure engine speed.
19. a spark tester must be connected between the spark plug wire and a(n) ______ part of the engine.
20. a compression tester measures the ______.
    a. distance traveled by the piston
    b. maximum air pressure created in the cylinder
    c. amount of valve lift
    d. none of the above.

copyright goodheart-willcox co., inc.
may not be reproduced or posted to a publicly accessible website.

Accepted Answer

13
# Brief Explanations:
In engine repair, when a flywheel holder isn't available, a suitable tool to hold the flywheel while removing the nut is a "vise" (or sometimes a "holding fixture", but commonly a vise or a similar clamping tool like a strap wrench or a special holding tool, but the most common substitute is a vise or a suitable clamp; however, the standard answer here is often a "vise" or more specifically a "holding tool", but the typical answer for this is a **vise** (or sometimes a "strap wrench" but in machining/engine repair, a vise or a flywheel holding tool substitute—commonly, the answer is a "vise" or "clamp", but the precise term here is a "vise" or "holding fixture", but the standard answer is a **vise** (or "holding tool", but the key is that a vise can be used to hold the flywheel).
# Answer:
vise (or holding tool, but the standard answer is typically "vise" or "clamp"—the precise term here is a **vise**)

### Question 14
# Brief Explanations:
On a severely worn engine, to shave the top portion of the cylinder (to true it up or remove wear/ridge) before piston removal, a **honing tool** or more specifically a **cylinder hone** or a **boring tool**? No, wait—when the cylinder has a ridge (from wear), a **ridge reamer** is used to remove the ridge. Wait, the question says "shave the top portion of the cylinder"—actually, a **cylinder hone** is for honing, but to remove the ridge (the top portion wear), a **ridge reamer** is used. Wait, the correct tool here is a **ridge reamer** (or "cylinder hone" if honing, but no—shaving the top portion (the ridge) before piston removal: the ridge is the hardened ring land at the top of the cylinder. To remove it, a **ridge reamer** is used. So the answer is a **ridge reamer**.
# Answer:
ridge reamer

### Question 15
# Brief Explanations:
A ring spreader is used to install new piston rings. Let's analyze the options:
- Option A: Rings are under tension, can't be spread by hand (correct, as piston rings have tension to fit in the cylinder, and spreading by hand would be hard and risk damage).
- Option B: Ring spreader doesn't cut the ring groove (groove is in the piston, spreader is for rings, so B is wrong).
- Option C: Rings may distort if installed by hand (but the main reason is tension—A is more accurate, as tension makes hand spreading impossible, leading to distortion risk, but A is the direct reason).
- Option D: Wrong, as A is correct.

So the correct option is A.
# Answer:
A. the rings are under so much tension they cannot be spread by hand

### Question 16
# Brief Explanations:
A ring compressor is used to compress piston rings so they can be inserted into the cylinder without catching on the wear ridge. Let's check options:
- Option A: Compress rings so they don't catch on wear ridge when piston is removed? No—ring compressor is for **installing** the piston (compressing rings to fit into cylinder). Wait, the question says "used to"—wait, ring compressor is used to compress the rings around the piston so that when the piston is inserted into the cylinder, the rings don't catch on the cylinder wall or ridge. Wait, the options:
- A: Compress rings so they will not catch on wear ridge when piston is removed? No—removal is different. Wait, no—ring compressor is for **installation**: when putting the piston into the cylinder, you compress the rings. But the option A says "when the piston is removed"—that's incorrect. Wait, maybe a typo, but let's recheck. Wait, no—maybe the option is about installation. Wait, the correct function of a ring compressor is to compress the rings around the piston so that during installation, the rings don't catch on the cylinder (especially the wear ridge at the top). But the options:
- A: Compress rings so they will not catch on wear ridge when piston is removed? No, removal is when you take the piston out—ring compressor is for installation. Wait, maybe the option is misworded, but among the options:
- A: If we assume it's a misword (installation instead of removal), but no. Wait, maybe the correct answer is A (even with the wording, as the key is compressing rings to prevent catching). Alternatively, D? No—let's think again. Ring compressor: when installing the piston, you use it to compress the rings so they fit into the cylinder. So the purpose is to compress the rings so they don't catch on the cylinder (including wear ridge) during installation. But the option A says "when the piston is removed"—that's incorrect. Wait, maybe the question has a mistake, but among the options, A is the closest (maybe "removed" is a typo for "installed"). So the answer is A.
- Option B: Reshape distorted rings? No, ring compressor is for new rings or undistorted rings, to compress for installation.
- Option C: Clean carbon? No, that's a ring groove cleaner or brush.
- Option D: Wrong, as A is the intended answer (despite wording).

So the correct option is A.
# Answer:
A. compress the rings so they will not catch on the wear ridge when the piston is removed

### Question 17
# Brief Explanations:
A glaze breaker (or cylinder hone with a glaze-breaking stone) is used to remove the glaze (hardened surface) from the cylinder walls, not to remove cylinder taper. Cylinder taper is measured and corrected by boring or honing, but a glaze breaker is for deglazing (removing the hard, smooth glaze). So the statement "A glaze breaker is used to remove cylinder taper during an engine rebuild" is False.
# Answer:
False

### Question 18
# Brief Explanations:
Test instruments to measure engine speed are **tachometers** (or "engine tachometers", "digital tachometers", etc.). Tachometers measure rotational speed (RPM) of the engine.
# Answer:
Tachometers (or Engine Tachometers)

### Question 19
# Brief Explanations:
A spark tester must be connected between the spark plug wire and a **grounded** part of the engine (e.g., the engine block, which is a ground connection). This allows the spark to jump through the tester to ground, enabling you to see if the spark plug is producing a spark.
# Answer:
grounded (or "ground", "engine block", "metallic grounded")

### Question 20
# Brief Explanations:
A compression tester measures the maximum air pressure created in the cylinder during the compression stroke (when the piston compresses the air-fuel mixture). Let's check options:
- Option A: Distance traveled by piston? No, that's not what a compression tester measures.
- Option B: Maximum air pressure in the cylinder? Yes, that's correct (compression pressure).
- Option C: Amount of valve lift? No, that's measured by a valve lift gauge.
- Option D: Wrong, as B is correct.

So the correct option is B.
# Answer:
B. maximum air pressure created in the cylinder

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