USPS EXAM 955 ACTUAL EXAM QUESTIONS
WITH CORRECT ANSWERS 2026
To find CURRENT (I)
V (volts) ÷ R (resistance)
Ohm's Law
V = IR
What is the formula for calculating speed?
Speed equals distance divided by time. S = D÷T
AC/DC Theory
AC = alternating current DC = direct current (AC current changes direction
periodically w/voltage polarity) (DC current flows one direction w/constant
voltage polarity)
What are ohms?
Unit for resistance
Hot or cold wires have low resistance?
Cold
Long wires have _____ resistance?
High
If you INCREASE resistance what happens to current?
Current DECREASES
RESISTANCE depends on ______?
1) Material
2) Thickness
, 3) Length
4) Temperature
Unit for voltage
VOLTS (V)
What are gasoline engine components?
GAS ENGINE
1) Pump
2) Relief valve
3) Directional control valve
4) Linear actuator 5) Reservoir
Formula for calculating gear speed (Gear ratio)
S = Distance ÷ Time
To find VOLTAGE, CURRENT and RESISTANCE...
V = I×R
C = V÷R
R = V÷I
WITH CORRECT ANSWERS 2026
To find CURRENT (I)
V (volts) ÷ R (resistance)
Ohm's Law
V = IR
What is the formula for calculating speed?
Speed equals distance divided by time. S = D÷T
AC/DC Theory
AC = alternating current DC = direct current (AC current changes direction
periodically w/voltage polarity) (DC current flows one direction w/constant
voltage polarity)
What are ohms?
Unit for resistance
Hot or cold wires have low resistance?
Cold
Long wires have _____ resistance?
High
If you INCREASE resistance what happens to current?
Current DECREASES
RESISTANCE depends on ______?
1) Material
2) Thickness
, 3) Length
4) Temperature
Unit for voltage
VOLTS (V)
What are gasoline engine components?
GAS ENGINE
1) Pump
2) Relief valve
3) Directional control valve
4) Linear actuator 5) Reservoir
Formula for calculating gear speed (Gear ratio)
S = Distance ÷ Time
To find VOLTAGE, CURRENT and RESISTANCE...
V = I×R
C = V÷R
R = V÷I
