Which of the following measuring tools has the most precision?
a. metric machinists rule
b. decimal machinists rule
c. thickness gauge
d. micrometer
d. micrometer
What part of the micrometer is revolved between the thumb and forefinger to bring the measuring points into contact with the surfaces being measured?
The thimble
You should never use a punch or chisel on what material?
hardened metal
Which of the following accessories, used with an air chisel or hammer, can be used to install pins and drive seized bolts?
a. universal joint and tie rod tool
b. ball joint separator
c. exhaust pipe cuter
d. tapered punch
d. tapered punch
What is required to cure an anaerobic sealant?
absence of air
When using an extension ladder, what is the general rule for proper angle for horizontal length to vertical height?
1 horizontal length to 4 vertical height
Guardrails must be installed on any temporary work platform that is _____m or higher above the ground
3
What should you consider when selecting rigging?
the safe working load limit
What is breaking strength in terms of rigging?
minimum load required to break that component
What is the recommended safe lifting angle for sling legs?
60 degrees
What is lay in terms of wire rope and how is it determined?
rotation of wires and strands in the rope. look at the end of the rope, to see if the rotation of strands and wires are to the right or left.
What is strand lay in terms of wire rope?
the direction that the wire is wound in each strand.
What is the order of three standard thread taps?
taper, plug, bottoming
What type of flare is required for high pressure fittings such as steel hydraulic brake lines?
double flare
What is the general cutting edge angle of a flat chisel?
60-70 degrees
T or F: dowel removers work well with dowels that are broken off at the work surface
F
T or F: a bearing separator is also referred to as a breaking splitter and is used to remove the balls of a bearing from within the race area
F
The tap best suited to tap a tapered hole for sealing of pressure would be a:
a. taper tap
b. national pipe thread tap
c. plug tap
d. bottoming tap
b. NPT tap
On an oxygen cylinder, the valve has a ______ thread connecting to the regulator?
right hand
T or F: the oxygen cylinder valve must be fully open when in use to prevent leakage
yes
Acetylene is very unstable after what PSI?
15psi
On an acetylene cylinder, the valve had a ______ thread connecting to the regulator?
left hand
How much should an acetylene valve be open when in use?
No more than one turn
What is the boiling point of propane?
-42 celcius
