USPS
# Term Definition
1 1. What is the raised part of a c) Shoulder
shaft called a) Bearing b)Crown c)
Shoulder d) Shelf
2 2. What type of bearing should B) A permanent seal bearing, Brass bushings
not be greased a) A roller bearing should not be greased.
b) A Permanent seal bearing c) A
ball bearing d) A Bad bearing
3 3. How would you seat a bearing, c) Outer (By applying pressure to the outer
by using the outer surface or surface)
inner surface? a) Inner, with a
brass hammer b) Inner, with an
arbor press c) Outer d) None of
above
4 4. Why are key ways placed on a a) To keep the pulley or gear from turning on
shaft? a) To keep the pulley or the shaft
gear from turning on the shaft b)
So you can lock and unlock them
c) So another shaft ca interlock
with the first shaft d) Sot the key
stock has a place to go
5 5. What is the name of a key that c) Woodruff key
is placed in the keyway that has
one side flat and the other side
rounded? a) Key stock b) Turn key
c) Woodruff key d) Salvatore key
6 6. What is essential about oil? a. a) Viscosity (proper Viscosity)
Viscosity b. cleanliness c. grade d.
all of the above
7 7. What is the difference between d) all of the above Oil requires a reservoir Oil
oil and grease? a. Oil requires a has lower viscosity Oil flows (Oil flows and has
reservoir b. Oil has lower lower viscosity than grease and it also requires
viscosity c. oil flows d. all of the a reservoir)
above
8 8. What is 90w oil typically used b) Gearbox 90W oil is typically used in gear
for? a. Chains b. gearboxes c. boxes
bearings d. all of the above
,USPS
# Term Definition
9 9. The number 6-32 means what c) Number 6 with 32 thread per inch 6 is the
to a screw or a bolt? a. 6mm, 32 diameter of the shaft in mm or number 6, 32 is
threads per inch b. 6 threads per the number of threads/inch
inch and 32mm long c. number 6
with 32 threads per inch d. none
of the above
10 10. What does ¼-20 mean on a a) ¼” shaft, 20 threads per inch
screw or bolt? a. 1/4" shaft, 20
threads per inch b. 1/4 pitch,
20mm long c. number 1, 4mm
shaft, 20mm long d. none of the
above
11 11. Is high viscosity oil used on c) low viscosity oil EX:10W
chains or low viscosity oil, or low
or high viscosity grease? a. Low
viscosity grease b. high viscosity
grease c. low viscosity oil d. high
viscosity oil
12 12. P is equal to what in Ohm's b) Power (watts)
law? a. Potential b. power c.
parallel d. peak
13 What is the formula for power? a. C. P=I2R, P=VI, P=V2/R
P=I2R, P=VI, P=V2/I b. P=I2R,
P=IR, P=V2/R c. P=I2R, P=VI,
P=V2/R d. P=I2V, P=VI, P=V2/R
14 14. Batteries are normally what a) DC
type of current? a. DC b. AC c.
Eddy d. Electron flow
15 15. The smallest unit of an True
element is an atom? True or False
16 16. In the left-hand rule of a) In the direction of current flow (- to +)
magnetism, what direction does
the thumb point? a. In the
direction of current flow b. in the
opposite direction of electron
flow c. in the direction of voltage
flow d. in the direction of the pull
of gravity
,USPS
# Term Definition
17 17. If amperage increases and b) It has decreased
voltage remains the same, what
has happened to the resistance?
a. it has stayed the same b. it has
decreased c. it has increased d.
all of the above
18 18. Grommets are used on a wire d) Protection of wiring insulation
way for what purposes? a. to
block out evil government rays b.
to ward off gremlins c. as a
wiring hardness d. protection of
wiring insulation
19 19. How do you reverse the turn d) Switch 2 of the hot legs
direction of a three-phrase
motor? a. switch any 2 wires b.
turn on the reverse switch c.
apply 480 instead of 208 d.
switch 2 of the hot legs
20 20. One horsepower equals how c) 746W (just a number for converting)
many watts? a. 120W b. 250W c.
746W d. 550W
21 21. What is the peak to peak 70.7 1.414 2 = 198V
voltage if the VRMS is 70.7? a.
141.4VP-P b. 198VP-P c. 70.7VP-P
D. 120VP-P
22 22. When replacing a fuse what is D) all of the above. Voltage, amperage and type
to be considered? a. Voltage b. should all be considered, amperage is more
Amperage c. Type d. All of the important
above
23 23. An NPN uses what kind of a) Positive (Emitter, Collector = negative)
polarity voltage at its base to
turn it on? a. positive b.
capacitive c. negative d. inductive
24 24. What is the housing of an d) Chassis
electronic circuit called? a.
housing b. container c. circuit
board d. chassis
, USPS
# Term Definition
25 25. What common device can be a) Diode
used to convert analog to digital?
a. Diode b. transistor c.
transformer d. D to A converter
26 26. What does the color band on d) The cathode
a diode indicate? a. Its resistance
b that it's a zener diode c. a
resistor must be connected to
the input d. the cathode
27 27. What is ESD? a. electrostatic a) Electrostatic Discharge
discharge b. electromotive static
discharge c. electric source
distribution d. employee square
dance
28 28. Name 2 bipolar transistors? a. a) NPN and PNP
NPN and PNP b. JFET and
MOSFET c. HSN and TNT d. UPN
and TBS
29 29. What action should be taken c) Replace the cord
when a drill motor cord is
damaged? a. splice the cord and
use heat shrink tubing to seal it
b. solder the connection back
together and use heat shrink
tubing c. replace the cord d. buy
a new drill
30 30. What equipment should be b) Goggles
worn when grinding? a. body
armor b. goggles c. kevlar d.
mouthpiece
31 31. What can be the effects of b) Explosion
sparks in a battery room? a. none
b. explosion c. mar the floor d.
indicate an open
32 32. Why are chain guards used? b) To safeguard against injury
a. to protect chains b. to
safeguard against injury c. to
keep chains on track d. because
guns aren't allowed in the postal
service
# Term Definition
1 1. What is the raised part of a c) Shoulder
shaft called a) Bearing b)Crown c)
Shoulder d) Shelf
2 2. What type of bearing should B) A permanent seal bearing, Brass bushings
not be greased a) A roller bearing should not be greased.
b) A Permanent seal bearing c) A
ball bearing d) A Bad bearing
3 3. How would you seat a bearing, c) Outer (By applying pressure to the outer
by using the outer surface or surface)
inner surface? a) Inner, with a
brass hammer b) Inner, with an
arbor press c) Outer d) None of
above
4 4. Why are key ways placed on a a) To keep the pulley or gear from turning on
shaft? a) To keep the pulley or the shaft
gear from turning on the shaft b)
So you can lock and unlock them
c) So another shaft ca interlock
with the first shaft d) Sot the key
stock has a place to go
5 5. What is the name of a key that c) Woodruff key
is placed in the keyway that has
one side flat and the other side
rounded? a) Key stock b) Turn key
c) Woodruff key d) Salvatore key
6 6. What is essential about oil? a. a) Viscosity (proper Viscosity)
Viscosity b. cleanliness c. grade d.
all of the above
7 7. What is the difference between d) all of the above Oil requires a reservoir Oil
oil and grease? a. Oil requires a has lower viscosity Oil flows (Oil flows and has
reservoir b. Oil has lower lower viscosity than grease and it also requires
viscosity c. oil flows d. all of the a reservoir)
above
8 8. What is 90w oil typically used b) Gearbox 90W oil is typically used in gear
for? a. Chains b. gearboxes c. boxes
bearings d. all of the above
,USPS
# Term Definition
9 9. The number 6-32 means what c) Number 6 with 32 thread per inch 6 is the
to a screw or a bolt? a. 6mm, 32 diameter of the shaft in mm or number 6, 32 is
threads per inch b. 6 threads per the number of threads/inch
inch and 32mm long c. number 6
with 32 threads per inch d. none
of the above
10 10. What does ¼-20 mean on a a) ¼” shaft, 20 threads per inch
screw or bolt? a. 1/4" shaft, 20
threads per inch b. 1/4 pitch,
20mm long c. number 1, 4mm
shaft, 20mm long d. none of the
above
11 11. Is high viscosity oil used on c) low viscosity oil EX:10W
chains or low viscosity oil, or low
or high viscosity grease? a. Low
viscosity grease b. high viscosity
grease c. low viscosity oil d. high
viscosity oil
12 12. P is equal to what in Ohm's b) Power (watts)
law? a. Potential b. power c.
parallel d. peak
13 What is the formula for power? a. C. P=I2R, P=VI, P=V2/R
P=I2R, P=VI, P=V2/I b. P=I2R,
P=IR, P=V2/R c. P=I2R, P=VI,
P=V2/R d. P=I2V, P=VI, P=V2/R
14 14. Batteries are normally what a) DC
type of current? a. DC b. AC c.
Eddy d. Electron flow
15 15. The smallest unit of an True
element is an atom? True or False
16 16. In the left-hand rule of a) In the direction of current flow (- to +)
magnetism, what direction does
the thumb point? a. In the
direction of current flow b. in the
opposite direction of electron
flow c. in the direction of voltage
flow d. in the direction of the pull
of gravity
,USPS
# Term Definition
17 17. If amperage increases and b) It has decreased
voltage remains the same, what
has happened to the resistance?
a. it has stayed the same b. it has
decreased c. it has increased d.
all of the above
18 18. Grommets are used on a wire d) Protection of wiring insulation
way for what purposes? a. to
block out evil government rays b.
to ward off gremlins c. as a
wiring hardness d. protection of
wiring insulation
19 19. How do you reverse the turn d) Switch 2 of the hot legs
direction of a three-phrase
motor? a. switch any 2 wires b.
turn on the reverse switch c.
apply 480 instead of 208 d.
switch 2 of the hot legs
20 20. One horsepower equals how c) 746W (just a number for converting)
many watts? a. 120W b. 250W c.
746W d. 550W
21 21. What is the peak to peak 70.7 1.414 2 = 198V
voltage if the VRMS is 70.7? a.
141.4VP-P b. 198VP-P c. 70.7VP-P
D. 120VP-P
22 22. When replacing a fuse what is D) all of the above. Voltage, amperage and type
to be considered? a. Voltage b. should all be considered, amperage is more
Amperage c. Type d. All of the important
above
23 23. An NPN uses what kind of a) Positive (Emitter, Collector = negative)
polarity voltage at its base to
turn it on? a. positive b.
capacitive c. negative d. inductive
24 24. What is the housing of an d) Chassis
electronic circuit called? a.
housing b. container c. circuit
board d. chassis
, USPS
# Term Definition
25 25. What common device can be a) Diode
used to convert analog to digital?
a. Diode b. transistor c.
transformer d. D to A converter
26 26. What does the color band on d) The cathode
a diode indicate? a. Its resistance
b that it's a zener diode c. a
resistor must be connected to
the input d. the cathode
27 27. What is ESD? a. electrostatic a) Electrostatic Discharge
discharge b. electromotive static
discharge c. electric source
distribution d. employee square
dance
28 28. Name 2 bipolar transistors? a. a) NPN and PNP
NPN and PNP b. JFET and
MOSFET c. HSN and TNT d. UPN
and TBS
29 29. What action should be taken c) Replace the cord
when a drill motor cord is
damaged? a. splice the cord and
use heat shrink tubing to seal it
b. solder the connection back
together and use heat shrink
tubing c. replace the cord d. buy
a new drill
30 30. What equipment should be b) Goggles
worn when grinding? a. body
armor b. goggles c. kevlar d.
mouthpiece
31 31. What can be the effects of b) Explosion
sparks in a battery room? a. none
b. explosion c. mar the floor d.
indicate an open
32 32. Why are chain guards used? b) To safeguard against injury
a. to protect chains b. to
safeguard against injury c. to
keep chains on track d. because
guns aren't allowed in the postal
service
