MIDTERM TECHNICAL

What thread form is used to transmit motion and power?

Acme

The measured size of a part or object is the ____ size.

Actual

The term "print" is used loosely to refer to ____.

All of the above

Which of the following characteristics is associated with artificial intelligence (AI)?

All of the above

The intentional difference in the dimensions of mating parts to provide for different classes of fits is called ____.

Allowance

When a surface is to be cleaned up or leveled to provide a bearing for a bolt head or nut, the process is called ____.

Spotfacing

____ gears are used to transmit rotary motion between two or more parallel shafts.

Spur

A ____ model is designed to show how a building is constructed.

Structural

A thread is considered to be a right-hand thread (RH) unless otherwise stated.

True

A unilateral tolerance varies in only one direction from the specified dimensions

True

CAD allows designers and drafters to try multiple design solutions. T/F

True

CNC machining can be used for making long- or short-run production items. T/F

True

CNC systems are operated from perforated paper tape, which was traditionally used with NC machines. T/F

True

Competition in manufacturing here and abroad is contributing to the demand for CAD systems. T/F

True

Construction details are usually included in a set of construction drawings when more information is needed. T/F

True

Datum dimensioning includes chain dimensioning when the first dimension in the chain starts with a datum. T/F

True

Design size is the size of a part after an allowance for clearance has been applied and tolerances have been assigned.

True

Diazo printing is a common way to reproduce drawings in industry.

True

Dimensioning for CNC machines with absolute positioning should be done with rectangular coordinate dimensioning. T/F

True

Drawings can be sent via electronic mail on the Internet T/F

True

Drawings used for programming CNC machines are much the same as those for traditional machining processes, but the dimensioning system must be compatible with the reference point system of the CNC machine. T/F

True

Dryseal is one form of American Standard pipe threads. True/False

True

FMS is a type of production system that can process single parts or "batches" in random order. T/F

True

For some applications, a photodrawing might be more descriptive than a conventional drawing.

True

Halftone photographs are generally used to produce the best reproduction quality for diazo prints. T/F

True

Harmonic motion moves the follower of a cam in a smooth, continuous motion. T/F

True

Hexagonal bolt heads and nuts are best represented when drawn across their corners. T/F

True

In mating spur gears, the smaller gear is referred to as the pinion. T/F

True

In plus and minus tolerancing, the tolerances are generally placed to the right of the specific dimension. T/F

True

Interchangeable manufacture means custom fitting of a part to a particular assembly. T/F

True

Keys are used to prevent rotation between a shaft and a machine part. T/F

True

Pen plotters produce high-quality line drawings in a variety of colors, but they are slow and cannot produce renderings. T/F

True

Pipe threads can be drawn in simplified form. T/F

True

Poor product design is sometimes the result of inadequate design information readily available to designers.

True

Reproduction of a print by the electrostatic process does not require sensitized print paper. T/F

True

Spotfacing is a cutting process used to clean up or level the surface around a hole to provide a bearing for a bolt head or nut. T/F

True

Straight spur gears are generally not satisfactory for high-speed applications because they are noisy. T/F

True

The ability of the designer to examine alternate designs for a product is improved by a CAD system. T/F

True

The basic shaft size provides a minimum shaft size. T/F

True

The control of dimensions is necessary because of the need for interchangeable parts. T/F

True

The diazo process produces positive prints with dark lines sometimes referred to as whiteprints. T/F

True

The divisions along the baseline of a cam displacement diagram represent equal intervals of time. T/F

True

The drawing scale of a building elevation is the same as that used for the floor plan and the foundation plan. T/F

True

The drive screw is considered to be a permanent fastener (it is not expected to be disassembled). T/F

True

The foundation plan includes information on excavation, waterproofing, and supporting structures. T/F

True

The function of a part determines the size of a tolerance zone. T/F

True

The largest number of reproductions used are opaque reproductions. T/F

True

The letters I, O, and U may not be used to identify a datum on a drawing. T/F

True

The quality of drawings to be microfilmed is very important. T/F

True

The schematic thread representation most closely represents the actual appearance of the thread. T/F

True

The size of the site determines the appropriate scale of a plot plan. T/F

True

The two types of runout control are circular and total. T/F

True

There are basic differences between architectural drawings and technical drawings.

True

Threads and threaded fasteners are used on most machine assemblies produced in industry. True

True

Tolerance is the intentional difference in the dimensions of mating parts to provide for different classes of fits. T/F

True

Tolerances can be given in the title block or in a note. T/F

True

Tolerances may be expressed as limit dimensions.

True

Vertical height dimensions are generally shown on an exterior elevation drawing. T/F

True

When drawing a cam using CAD, the cam profile is drawn after creating the displacement diagram. T/F

True

When using a CAD system, threads and threaded parts are typically generated by inserting blocks. T/F

True

What are the three basic types of positional tolerances?

True position, concentricity, and symmetry.

What thread form is used by the United States, Canada, and Great Britain as the standard for fasteners such as bolts, machine screws, and nuts?

Unified

If you were to design a cam to operate at high speed, which of the following motions would you select?

Uniformly accelerated motion.

The use of ____ thread symbols is the quickest way to represent threads on a drawing. T/F

simplified

A part that has the same contour and size on opposite sides of a central plane or datum feature is a(n) ____ feature. (0.33pts)

symmetrical

The same drawing principles used in laying out cam profiles in manual drafting apply to CAD drafting. T/F

true

The purpose of a ____ is to prevent rotation between the shaft and its related member.

Spline

What is the standard minimum spacing between parallel lines when making drawings suitable for microfilming?

.06

Which of the following is a correct chamfer specification?

.06 ' 45

At what scale is the foundation plan for a residential structure usually drawn?

1/4"=1-0

At what scale is the foundation plan for a commercial structure usually drawn?

1/8" = 1-0'

Which thread class designates an external thread with a tight fit?

3A

In the design of mating cylindrical parts, it is necessary to assume a(n) ______________________________ size for either the hole or shaft.

Basic

Which of the following is not a basic type of cam follower?

Bevel

What are the two subsystems of computer-integrated manufacturing (CIM)?

CAD and CAM

The dimensional note on a drawing specifying a machine process is referred to as a ____.

Callout

Which thread class represents the loosest fit?

Class 1

Which of the following describes the condition of two or more surfaces of revolution having a common axis?

Concentricity

The ____ process produces positive prints with dark lines sometimes referred to as white prints. (0.5pts)

DIazo

___ refers to the distance a cam follower moves in relation to the rotation of the cam.

Displacement

A screw thread note provides information in a standard sequential order. Which of the following is presented in the proper order?

Nominal size, number of threads per inch, thread form, thread series, class of fit.

What plan drawing shows the electrical meter, distribution panel box, electrical outlets, switches, and special electrical features?

Electrical

Which of the following is not shown on a residential climate control plan?

Electrical switches

A(n) ____ shows a view of the side of a structure.

Elevation

A type of production system that can process single parts or "batches" in random order is called a(n) ____.

FMS

A machining center may be a subsystem of CAM but is usually not a part of an FMS. T/F

False

A two-story house requires one floor plan. T/F

False

American National threads and Unified threads are not mechanically interchangeable. T/F

False

CAD and CAM databases are developed independently of each other. T/F

False

CAM is a subsystem of CAD. T/F

False

Exterior elevations of residential structures are orthographic projections T/F

False

Geometric dimensioning and tolerancing is used when interchangeability is not important. T/F

False

Group technology refers to a grouping of parts that have similar design characteristics but differ in machining characteristics. T/F

False

If a measurement is within tolerance when measured from the secondary and tertiary datum, but not from the primary datum, then the feature may be considered within tolerance. T/F

False

In dimensioning drawings for numerical controlled machining, chain dimensioning should never be used. T/F

False

Incremental dimensions for CNC machine drawings should be applied as rectangular coordinate dimensions. T/F

False

On CAD drawings, inquiry commands are used to generate geometric dimensioning and tolerancing symbols. T/F

False

Photodrawing refers to the revision, or updating, of a drawing by splicing in new material, then photographing for a second original. T/F

False

Rivet sizes are indicated by the diameter of the shank and the pitch.

False

Schematic thread symbols are approved for the representation of all screw threads but are not generally recommended. T/F

False

Screw threads are specified on a drawing by a note. T/F

False

Splines are used to provide for rotary motion between a shaft and a gear. T/F

False

Surface texture refers to the finish applied to a machined surface, such as a plating or spray lacquer. T/F

False

The Sharp V thread form is used when a loose fit is required. T/F

False

The electrostatic process requires a translucent intermediate medium to reproduce a suitable print. T/F

False

The harmonic motion cam should be used for machinery operating at slow speeds.

False

The normal drafting practice is to use the detailed form of gear representation on drawings.T/F

False

The pitch diameter is the same as the outside diameter on an external thread. T/F

False

The primary reason for using a flat washer is to make the assembly look better.

False

The terms "bolt" and "stud" are used interchangeably in industry. T/F

False

When laying out a cam with an offset roller follower, the center point of the follower is located at the center of the base circle.

False

A general term referring to the range of "tightness" or "looseness" in the design of mating parts is ______________________________.

Fit

Drawings showing the systems of a structure, such as plumbing plans and electrical plans, are typically traced from the ____ plan.

Floor

Thread terms such as Unified, square, and Acme refer to thread ____.

Form

Which of the following is not typically drawn as details in a set of construction drawings?

Foyers

____ refers to a grouping of parts that have similar design characteristics into families of parts for production.

GT

When mating spur gears of different size are in mesh, the larger one is called the ____.

Gear

The acronym for heating, ventilation, and air conditioning is ______________________________.

HVAC

__________________________ describes how close a surface or axis is to being at a right angle to a datum plane or axis.

Perpendicularity

Which of the following is a true statement where the maximum material condition is present?

Internal features such as holes or slots are at their minimum size.

Which of the following is not an advantage of CAD for the design drafting department?

It eliminates all errors on drawings.

What type of fastener is used to prevent rotation between a shaft and machine part?

Key

In mating gears, the smaller gear is referred to as the ____.

Pinion

Which drawing in a set of construction drawings shows the location of the structure on the site?

Plot Plan

A ____ model is designed to show the finished appearance of the building as realistically as possible.

Presentation

What device is used to measure the smoothness of a surface texture or finish?

Profilometer

What is the standard pipe thread form used in the plumbing trade?

Regular

Architectural firms using CAD typically develop presentation drawings as ____.

Renderings

A(n) ____ is a programmable multifunctional manipulator designed to move material, parts, tools, or specific devices through variable motions for the performance of a variety of tasks.

Robot

Which of the following is a true statement where the least material condition is present?

Shafts are at minimum size.

Which architectural model is designed to show how a building will relate to surrounding structures?

Small-scale solid model

In a set of construction drawings, what has the most influence on the type and number of drawings required for a structure?

The type of structure.

A basic dimension is ____.

a theoretically exact, untoleranced dimension

Traffic flow, land use, and landscaping plans are generally included in a set of ____ drawings.

architectural

When the limits of size are so prescribed that a clearance always results when mating parts are assembled, this is an example of a(n) ____ fit.

clearance

When the distance between two features must be closely controlled without the use of an extremely small tolerance, ____ dimensioning should be used.

datum

The number of teeth in a spur or bevel gear per inch of pitch diameter is referred to as the ____.

diametral pitch

An extremely smooth machine finish as fine as 2 min is usually accomplished with a ____ operation. (0.4pts)

honing or lapping