CAE Test 1

T/F 0.750 with overall dimension of 2.250 is this double dimensioning?

True

T/F A centerline may be used as an extension line when appropriate

True

What is not a standard method of specifying a dimensional tolerance?

Scale dimensioning

Dimension: 1.500 +0.000/-0.003 examle of:

Unilateral tolerancing

What statment best describes trend from RC2 to RC8

the fit generally become looser and permits greater clearance

T/F An FN4 force generally requires greater assembly pressure than an FN1 light drive fit

True

a hole has limits of 1.2500-1.2514 in, and a mating shaft has limits of 1.2478-1.2491. What is the minimum & maximum clearance?

1.2500-1.2491 = 0.0009/ 1.2500-1.2478 = 0.0036

What dimensioning approach most clearly communicates the intended reference feature?

Dimension important features from a common reference surface when appropriate

A mating pair has Cmin < 0 and Cmax > 0. What descriptin is most consistent with these limits?

Transition fit

Which item is listed in the lecture as required in the title block?

Drawing Number

Scale is required on the Drawing but it is required in the title block

False

Which item would normally be expected on an assembly drawing but not on an individual detail drawing?

Bill of materials

On an assembly drawing, numbered balloons primarily serve:

identify componets correspondings to the BOM item numbers

What description best matches a standard part?

A part whose dimensions, materials, and properties are specified by a national or international standard

Which statement about a purchased part is correct?

It does not require a detail drawing but does require a technical specification sheet

For a purchased component in a design BOM, the lecture recommends

OEM designation

What is the correct general order for a drawing package?

Master assembly → subassembilies → detail drawings

GD&T symbol chart

iykyk

Which statement about flatness is most consistent with the lecture’s GD&T classification?

Flatness is a form control

2-in feature requires a tolerance of +- 0.0008. Which is least precise?

Look at chart; closest within the tolerance

A milled feature requiring +-0.0015 can be produce in the table?

False

What is Ra based off of the graph?

Average absolute height of a triangle(1/2)

Extreme peaks and valleys influence Rz more strongly than they infulence Ra?

True

which parameter expresses the ointing/sharpness of the surface-height distribution?

Kurtosis

What is the RMS roughness parameter

Rq

Compared with roughness, waviness refers to surface variation occurring over generally longer spacing along the surface

true

Which process is normally performed using abrasive grit suspended in a fluid or slurry?

lapping

Which process does not rely on abrasive particles as the cutting medium

Broaching(uses a multi-tooth cut). Not Lapping,honing, grinding

A finishing operation produces a characteristic cross-hatched texture in an internal cylinder bore.

Honing

On a lathe, a single-point cutting toll is fed into a existing hole to enlarge:

Boring

Which process is especially well suited to producing an internal noncircular profile such as a keyway or spine-like form in one pass?

Broaching

A rectangular slot is to be machined in a prismatic block using a rotating multi-tooth cutter. the process is:

Milling

In planing what happens to the tool and the workpiece and what is the opposite of this?

Tool is pre set and the workpiece constantly moves. Shaping

T/F Cold-worked steels are typically harder and stronger than comparable standard hot-rolled steels

True

Complex automotive-type parts such as connecting rods are commonly associated in the lecture with:

Close-Die forging

In Sand casting, the component placed in the mold to create an internal cavity in the final casting is the:

Core

Which forming process creates long products of essentially constant cross-section by forcing a billet through a die?

Extrusion; fake out by the die forging

Describe a bolt as preseted in the lecture

Has a head an external threads and is normally paired with a nut

For a standard external thread, the nominal size corresponds to the:

Major diameter

For the same nominal diameter, which Unified National series has the largest pitch?

UNC

what is the designation (1/2 - 16 UNF-2A)

nominal size: 1/2||| Threads per inch: 16||| Third Class: External

T/F For a fixed nominal diameter, changing from UNC to UNF generally produces a larger tensile stress area

True

Which diameter is used to calculate the area resisting transverse shear in the threaded section?

Minimum minor diameter

The tensile stress area (At) is defined as the cross-sectional area of an unthreaded rod having the same tensile strength as the corresponding threaded rod/ The effective diameter used for At lies:

between the pitch and the minor diameters

T/F In the longitudinal thread-shear relation, Le is the length of engaged threads between the mating parts

True

This statement is true

A tap forms/cuts an internal thread and a die forms/cuts an external thread

What is the best suited tap for cutting threads close to the bottom of a blind hole after most of the thread has already been started?

Bottoming Tap

What hand tap is identified as the general-purpose tap?

Plug Tap

Lecture Estimate TD = MD - 1/N, what tap-drill diameter is estimated for a 1/2-20 thread?

= 0.5 - 1/20

According to the metric tap-drill chart used in the lecture, the tap drill and M14×1.5 thread is approximately:

14-1.5 =

In the metric designation M14×2.0, the thread pitch is 2.0mm; it does not mean two threads per millimeter

True

What is the thread profile of Buttress, Acme, and Square

Zigzag, trapezoidal, square

For a permanent bolted connection, the lecture recommendation for preload is approximatley:

0.75Fp

A bolt has proof load Fp = 24kN and is used in a permanent connection. What preload should be used?

= 0.75(Fp)

What is Grinding

2 wheels spin together to polish and grind on a workpiece

What is Reaming

obtains an accurate hole size usually after drilling and boring

What is Drilling

makes holes either using a counterbore or countersink