AST Level 1 Learning Path QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS
A class C type fire extinguisher can be used on what type of fires?
A. rubber
B. electrical wiring
C. gasoline
D. all answers are correct - ANSWER B. electrical wiring
The material safety data sheets (MSDS or SDS) for most transmission fluids
indicate that there are what safety hazards when working with new fluid?
A. Possible skin cancer
B. Possible exposure to HIV
C. Possible swelling of spots exposed to the fluid
D. Possible skin reaction - ANSWER D. Possible skin reaction
Carbon monoxide is an odourless but deadly gas. (T/F) - ANSWER true
A(n) ____ is a hand valve that isolates the tank pressure from shop line pressure.
A. air tank shutoff valve
B. automatic unloader
C. compressor drain valve
D. pressure switch - ANSWER air tank shutoff valve
,What tool can be used to make measurements within 0.0001 of an inch?
A. micrometer
B. vernier caliper
C. dial caliper
D. machinist's rule - ANSWER A. micrometer
Check the calibration of precision measuring tools:
A. annually.
B. with each use.
C. only after a great deal of use.
D. never. - ANSWER B. with each use.
The brushes are used to transfer electrical power between __________.
A. The solenoid and the field coils
B. The commutator and the segments
C. Field coils and the armature
D. The armature and the solenoid - ANSWER C. Field coils and the armature
Technician A uses a soft-face hammer to tap a bearing into its bore. Technician B
uses a ball-peen hammer and brass drift. Who is correct? - ANSWER both
When installing a ball bearing that is a press fit [tight] onto the main shaft,
pressure should be applied to the _____ race.
A. inner
B. outer
,C. both "inner" and "outer"
D. neither "inner" nor "outer" - ANSWER A. inner
The ____ grinder is MOST-Likely to be used with mounted points and carbide
burrs for a variety of applications, such as weld cleaning, deburring, blending, and
smoothing.
A. cut off grinder
B. small wheel grinder
C. angle grinder
D. die grinder - ANSWER D. die grinder
In an oxyacetylene welding torch the acetylene hose is colored _____.
A. red
B. blue
C. green
D. yellow - ANSWER A. red
The standard flame is said to be a(n) ____.
A. torch flame
B. neutral flame
C. oxidizing flame
D. carburizing flame - ANSWER B. neutral flame
, ____ is a method of welding in which a nonferrous metal with a lower melting
point (temperature) than that of the base metal is melted without melting the
base metal.
A. Pressure welding
B. Vertical welding
C. Undercutting
D. Brazing - ANSWER D. Brazing
____ affects the base metal penetration depth, the speed at which the wire is
melted, arc stability, and the amount of weld spatter.
A. Plug weld
B. Flat welding
C. Plasma arc cutting
D. Welding current - ANSWER D. Welding current
____ is used to provide anticorrosion protection to weld zones.
A. Weld-through primer
B. Self-etching primer
C. Sealant
D. Undercoat - ANSWER A. Weld-through primer
A ____ on the back of a weld is an indication of good weld penetration.
A. plug weld
B. burn mark
C. stitch weld
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