IN ANSWERING QUESTION 2-12, REFER TO TABLE
1-1 IN THE TEXTBOOK.
2-12.
What is the type and composition of
SAE 5135 steel?
1.
Nickel steel, 5-percent nickel
and 13.5-percent carbon
2.
Chromium steel, l-percent
chromium and 0.35-percent
carbon
3.
Chromium steel, 13-percent
carbon and 0.5-percent chromium
4.
Nickel steel, 5-percent steel,
l-percent nickel, and 0.35-
percent carbon
2-13.
While holding a piece of metal
against a revolving stone, you see
red sparks leave the stone and turn
to straw color.
This is what type
of metal?
Low-carbon steel
2.
Nickel steel
3.
Wrought iron
4.
Cast iron
IN ANSWERING QUESTIONS 2-14 THROUGH 2-17,
SELECT FROM COLUMN B THE TYPE OF STEEL
USED IN THE ITEM LISTED IN COLUMN A.
A.
ITEMS
B,
TYPES OF
STEEL
2-14.
Bolts
1.
Nickel
steel
2-15.
Safety wire
2.
Chromium
2-16.
Coil springs
steel
2-17.
Antifriction
3.
Low-carbon
ball bearings
steel
4.
High-carbon
steel
2-18.
What is the prime characteristic of
aluminum?
1.
Lightweight
2.
Low melting point
3.
Ease of fabrication
4.
Corrosion-resistant properties
2-19.
Which of the following processes of
joining aluminum alloys produces
the strongest joints?
Brazing
2.
Forging
3.
Riveting
4.
Heat treating
2-20.
Which of the following statements
is correct concerning an aluminum
sheet designated 1075?
It is 99.75 percent aluminum
2.
It contains 0.75 percent carbon
3.
It is alloyed with nickel
4.
It is pure aluminum with a
modification in impurities
IN ANSWERING QUESTIONS 2-21 AND 2-22,
REFER TO TABLE 1-2 IN THE TEXTBOOK.
2-21.
2-22.
2-23.
2-24.
2-25.
2-26.
What is the principal alloying
element of aluminum alloy 2024?
Zinc
2.
Copper
3.
Manganese
4.
Magnesium
An aluminum alloy containing
manganese as the major alloying
element is identified by what
number?
1035
2.
2014
3.
3003
4.
7010
An aluminum alloy that is fully
heat treated will have what letter
designation?
F
2. H
3.
0
4. T
Which of the following aluminum
alloys should be used when the
highest strength is required?
1.
1100
2.
2014
3.
5052
4.
7178
Alclad is an aluminum alloy with a
protective coating of what
material?
1.
Manganese
2.
Pure aluminum
3.
Zinc chromate
4.
Aluminum oxide
In the aluminum alloy designation
A355-T51, what does the prefix A
indicate?
1.
The
2.
The
3.
The
4.
The
was
heat treatment
type of casting
composition of the casting
original alloy composition
variated slightly
7
1.
1.
1.
1.
1.
1.
