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26 questions
What is the load on a dc motor?
The field current
The armature current
The mechanical device the motor moves
The total current drawn from the source
How can the direction of rotation be changed in a dc motor?
Only by reversing the field connections
Only by reversing the armature connections
By reversing both the armature connections and the field connections
By reversing either the armature connections or the field connections
Which of the following is not a part of a motor?
Stator
Rotor
Yoke
None of the above
Which of the following bolts are stronger?
Grade 2
Grade 5
Grade 8
None of the above
Which of the following is a common type of vise used for mechanical work?
pipe vise
bench vise
machine vise
All of the above
Mallet heads are constructed from which of the following materials?
Brass only
Plastics only
Rubber only
Brass, plastics, and rubber
What is the prime characteristic of aluminum?
Lightweight
Low melting point
Ease of fabrication
Corrosion-resistant properties
If bar Y moves at a constant speed to the left, how does bar X move?
Left, Faster
Left, Same
Right, Same
Right, Slower
If drive wheel X rotates clockwise at a speed of 10 rpms, how does wheel Y turn?
Counterclockwise Faster
Clockwise Slower
Clockwise Faster
Counterclockwise Same
If drive wheel X rotates clockwise at a speed of 10 rpms, how does wheel Y turn?
Counterclockwise faster
Clockwise faster
Counterclockwise same
Clockwise same
In the circuit shown, how many switches need to be closed to light up one bulb?
One
Two
Three
None
Which tool is most suitable for breaking up concrete?
One
Two
Three
Four
Which combination of tools would be most useful for general woodworking?
4 and 2
3, 5, and 7
2, 4 and 6
4 and 7
If bulb 1 is removed, how many bulbs will light up when the switch is closed?
One
Two
Three
Four
Approximately how much force is needed to move the weight?
9 lbs
18 lbs
6 lbs
24 lbs
How far does B need to move to lift the weight up 6 feet?
3 ft
6 ft
12 ft
8 ft
If drive wheel X rotates clockwise at a speed of 10 rpms, how does wheel Y turn?
Counterclockwise faster
Clockwise faster
Counterclockwise same
Clockwise same
If drive wheel X rotates clockwise at a speed of 10 rpms, how does wheel Y turn?
Counterclockwise faster
Clockwise slower
Clockwise faster
Counterclockwise slower
What metal property allows a metal to carry heat or electricity?
Ductility
Fusibility
Conductivity
Malleability
What metal property allows a metal to be hammered, rolled, or pressed into various shapes without cracking or breaking?
Brittleness
Malleability
Ductility
Elasticity
What is the principal element added to copper to form brass?
Tin
Lead
Zinc
Aluminum
What device is designed to disconnect the engine from the power train?
Universal joint
Transfer case
Clutch
Differential
What is the primary goal of any safety program?
To place safety violators on report
To enhance operational readiness
To eliminate all accidents
To predict all accidents
What is the primary purpose of a mishap investigation?
To determine fault
To determine replacement cost
To determine the effects on operational readiness
To determine the causes and prevent recurrences
An internal combustion engine is a machine that
uses heat to create mechanical energy
converts heat energy to mechanical energy
converts mechanical energy to heat energy
use mechanical energy to create heat
What type of information is contained in Material Safety Data Sheets?
Material supply codes
Information about hazardous material
Material transfer dates
The age of the materials
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