- | P a g e
CWEA ELECTRICAL AND INSTRUMENT GRADE
2 EXAM EWEST 2024-2025 ACTUAL EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
What is the main electrical danger when using power tools? - ANSWER- A short circuit
Shielding protects an analog meter from? - ANSWER- Stray magnetic fields.
The frame, core, winding and end plates are all parts of? - ANSWER- A stator.
If 17.32v are applied across a resistance of 50 ohms, how much power is expended in the resistor? - ANSWER- 6.0 watts.
Formula: V squared/R = P
17.32 squared(299.98)/50=5.99
Signal range for pneumatics? - ANSWER- 3-15psi. 3-6-9-12-15 1 / 3
- | P a g e
If transformer primary=120v and secondary 12v=20 amps, what are the amps on the primary? - ANSWER- 2 amps.
Formula:
I =Amps/Volume of current E = Volts/Force moving the current P = Watts, Electrical power produced I x E=P 12 x 20=240watts
In a transformer watts stay the same so now:
P/E=I 240/120v=2 amps
What happens when a motor loses one phase out of 3? - ANSWER- Single phasing will cause the motor to trip the overload heaters
What instrument do you use to measure 4-20 mA? - ANSWER- DC clamp meter
How do you connect an ammeter to check an electrical circuit? - ANSWER- In series with the load. 2 / 3
- | P a g e
If you are angry or impatient with one worker you should? - ANSWER- Avoid transferring that feeling to others.
First step in troubleshooting a programmable logic controller(PLC) system is? - ANSWER- Know the process
Which of the following actions should be taken before working on controls that may disrupt plant operations? - ANSWER- Have an operator present.
Which of the following best describes the efficiency of preventive maintenance for plant equipment? - ANSWER- Periodic inspection of facilities to discover developing defects that could lead to equipment failure.
In a 240v-120v Delta system, the high leg is? - ANSWER- 208v
What class and division above water on a primary clarifier? - ANSWER- Class 1 Division 2
AC reads out how? - ANSWER- Peak to peak.
- / 3