EMAE 160 RVW 7 EXAM QUESTIONS
AND ANSWERS
List three types of electroplating used for steel. - ANSWER-Electrostatic spray, Dip
coating and Powder coating
Diameters smaller than 1/4" use numbers in the U.S. What do these numbers
designate? - ANSWER-(For diameters smaller than 1⁄4 inch, the) diameter is
indicated by an integer number defined in the standard. (This number pair is followed
by the letters UNC, UNF or UNEF if the diameter-pitch combination is from the
"coarse", "fine" or "extra fine" series, and may also be followed by a tolerance class)
Hard facing utilizes which of the following basic procedures? - ANSWER-arc welding
Maximum Thread engagement? - ANSWER-1.5 * diameter
Define the components of the following designation: 3/8-24 UNC B2 LH. - ANSWER-
3/8: major diameter of thread (inches) - 24: threads per inch; UNC: thread series
(united national code) ; B: internal threads, 2: class of fit (thread tolerance) ; LH:
special, left-handed thread
Lockwasher? - ANSWER-Loc-tite, Nylon insert.
Clean with alkaline or solvent? NO spots. - ANSWER-Solvent
Why use passivation ? - ANSWER-SS are not completely impervious to rusting
Ferrous will ______ (rust/corrode) and non-ferrous will ______ (rust/corrode). -
ANSWER-rust. corrode.
Tumble de-burring? - ANSWER-(ie barrel rolling, vibratory finish, etc.);
De-burring in a machine that vibrates to cause tumbling so as to smoothen and
polish rough surfaces on relatively small parts in mass media.
(Removes burrs, creates radius edges, polishes)
Identify three chemical cleaning methods. - ANSWER-Alkaline, Emulsion, Solvent
What is the typical thickness of an electroplated coating? - ANSWER-0.0001-0.0003
(nickel)
What plate metal produces the hardest surface on a metallic substrate? - ANSWER-
Nickel plate metal
What is the most commonly plated substrate metal? - ANSWER-Chrome
What plating metal is associated with the term galvanizing? - ANSWER-Zinc
AND ANSWERS
List three types of electroplating used for steel. - ANSWER-Electrostatic spray, Dip
coating and Powder coating
Diameters smaller than 1/4" use numbers in the U.S. What do these numbers
designate? - ANSWER-(For diameters smaller than 1⁄4 inch, the) diameter is
indicated by an integer number defined in the standard. (This number pair is followed
by the letters UNC, UNF or UNEF if the diameter-pitch combination is from the
"coarse", "fine" or "extra fine" series, and may also be followed by a tolerance class)
Hard facing utilizes which of the following basic procedures? - ANSWER-arc welding
Maximum Thread engagement? - ANSWER-1.5 * diameter
Define the components of the following designation: 3/8-24 UNC B2 LH. - ANSWER-
3/8: major diameter of thread (inches) - 24: threads per inch; UNC: thread series
(united national code) ; B: internal threads, 2: class of fit (thread tolerance) ; LH:
special, left-handed thread
Lockwasher? - ANSWER-Loc-tite, Nylon insert.
Clean with alkaline or solvent? NO spots. - ANSWER-Solvent
Why use passivation ? - ANSWER-SS are not completely impervious to rusting
Ferrous will ______ (rust/corrode) and non-ferrous will ______ (rust/corrode). -
ANSWER-rust. corrode.
Tumble de-burring? - ANSWER-(ie barrel rolling, vibratory finish, etc.);
De-burring in a machine that vibrates to cause tumbling so as to smoothen and
polish rough surfaces on relatively small parts in mass media.
(Removes burrs, creates radius edges, polishes)
Identify three chemical cleaning methods. - ANSWER-Alkaline, Emulsion, Solvent
What is the typical thickness of an electroplated coating? - ANSWER-0.0001-0.0003
(nickel)
What plate metal produces the hardest surface on a metallic substrate? - ANSWER-
Nickel plate metal
What is the most commonly plated substrate metal? - ANSWER-Chrome
What plating metal is associated with the term galvanizing? - ANSWER-Zinc
