Postal Maintenance 1, USPS 2, USPS Test Questions, Test
1, Et Study, Postal Maintenance 3, Post Maintenance 4,
Postal Maintenance 5, Postal Maintenance 5, Postal
Maintenance 3, Postal Maintenance 2
What is the raised part of a shaft?
Shoulder
What type of bearing should not be greased?
Permanent seal bearing
How would you seat a bearing, by using the outer surface or
inner surface?
Outer
What are key ways placed on a shaft?
To keep the pulley or gear from turning on the shaft
,What is the name of a key that is placed in the keyway that has
one side flat and the other rounded?
Woodruff key
What is essential about oil?
All of the above
What is the difference between oil and grease?
All of the above
What is 90W oil typically used for?
Gear boxes
The number 6-32 means what to a screw or a bolt?
6mm, 32 threads per inch
What does 1/4-20 mean on a screw or bolt?
1/4" shaft, 20 threads per inch
Is high viscosity oil used on chains or low viscosity oil, or low or
high viscosity grease?
Low viscosity
P is equal to what in Ohm's Law?
Power
What is the formula for power?
P=I2R, P=VI, P=V2/R
Batteries are normally what type of current?
,DC
The smallest unit of an element is an atom
True
In the left-hand rule of magnetism, what direction does the
thumb point?
In the direction of the current flow
If amperage increases and voltage remains the same, what has
happened to the resistance?
It has decreased
Grommets are used on a wire way for what purposes?
Protection of wiring insulation
How do you reverse the turn direction of a three-phase motor?
Switch 2 of the hot legs
One horsepower equals how many watts?
746W
What is the peak to peak voltage if the VRMS is 70.7?
70.7 X 1.414 X 2 = 198
When replacing a fuse what is to be considered?
Voltage, Amperage, and type.
An NPN uses what kind of polarity voltage at its base to turn it
on?
, Positive
What is the housing of an electronic circuit called?
Chassis
What common device can be used to convert analog to digital?
Diode
What does the color band on a diode indicate?
The cathode
What is ESD?
Electrostatic Discharge
Name 2 bipolar transistors
NPN and PNP
What action should be taken when a drill motor cord is
damaged?
Replace the cord
What equipment should be worn when grinding?
Goggles
What can be the effects of sparks in a battery room?
Explosion
What are chain guards used?
To safeguard against injury
1, Et Study, Postal Maintenance 3, Post Maintenance 4,
Postal Maintenance 5, Postal Maintenance 5, Postal
Maintenance 3, Postal Maintenance 2
What is the raised part of a shaft?
Shoulder
What type of bearing should not be greased?
Permanent seal bearing
How would you seat a bearing, by using the outer surface or
inner surface?
Outer
What are key ways placed on a shaft?
To keep the pulley or gear from turning on the shaft
,What is the name of a key that is placed in the keyway that has
one side flat and the other rounded?
Woodruff key
What is essential about oil?
All of the above
What is the difference between oil and grease?
All of the above
What is 90W oil typically used for?
Gear boxes
The number 6-32 means what to a screw or a bolt?
6mm, 32 threads per inch
What does 1/4-20 mean on a screw or bolt?
1/4" shaft, 20 threads per inch
Is high viscosity oil used on chains or low viscosity oil, or low or
high viscosity grease?
Low viscosity
P is equal to what in Ohm's Law?
Power
What is the formula for power?
P=I2R, P=VI, P=V2/R
Batteries are normally what type of current?
,DC
The smallest unit of an element is an atom
True
In the left-hand rule of magnetism, what direction does the
thumb point?
In the direction of the current flow
If amperage increases and voltage remains the same, what has
happened to the resistance?
It has decreased
Grommets are used on a wire way for what purposes?
Protection of wiring insulation
How do you reverse the turn direction of a three-phase motor?
Switch 2 of the hot legs
One horsepower equals how many watts?
746W
What is the peak to peak voltage if the VRMS is 70.7?
70.7 X 1.414 X 2 = 198
When replacing a fuse what is to be considered?
Voltage, Amperage, and type.
An NPN uses what kind of polarity voltage at its base to turn it
on?
, Positive
What is the housing of an electronic circuit called?
Chassis
What common device can be used to convert analog to digital?
Diode
What does the color band on a diode indicate?
The cathode
What is ESD?
Electrostatic Discharge
Name 2 bipolar transistors
NPN and PNP
What action should be taken when a drill motor cord is
damaged?
Replace the cord
What equipment should be worn when grinding?
Goggles
What can be the effects of sparks in a battery room?
Explosion
What are chain guards used?
To safeguard against injury
