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CWEA E4 Exam Questions and Answers Verified Solutions Latest Update

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CWEA E4 Exam Questions and Answers Verified Solutions Latest Update

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I LEVEL 3 Instrumentation Technician
TEST Questions and Answers
Verified Solutions Latest Update


Question:

✔ You have been informed that your centrifugal pump was discharging properly and
now it is not, what is the issue?

Answer:
Air or vapor in liquid. ✔ If you have been given written instructions that you don't
understand, what should you do? Ask the author for clarification. ✔ An SCBA is used for
what kind of work? Escape and rescue. ✔ When is a piece of equipment considered
LOTO and safe to work on? Answer: When you have brought the machine to zero
energy state using LOTO. ✔ Prescription eyeglasses that can be worn in an industrial
setting must be approved by what agency? Answer: ANSI. ✔ What is the device on a
power tool that cuts off power when released? Answer: Deadman switch. ✔ What type
of saw is designed to cut wood with the grain? Answer: Ripsaw. ✔ What are the two
primary types of anti-friction bearings? Answer: Ball and roller. ✔ What are the two
types of positive displacement air compressors? Answer: Reciprocating and Rotary. ✔
What is the purpose of a shaft sleeve? Answer: Protect the pump shaft. ✔ What is the
purpose of surface skimming sprays? Answer: Scum collection. ✔ What is alternating
current? Answer: Current flow that is continuously reversing in direction. ✔ What is the
area on a centrifugal pump that holds the packing? Answer: Stuffing box. ✔ In a
mechanical drawing a dashed line ----- represents what? Answer: A hidden line. ✔ When
ordering sheet steel, you should designate the thickness by what? Answer: Gauge
number. ✔ What is the most widely used of all smaller sized pipe valves? Answer:
Globe valve. ✔ Receiving job instruction and planning equipment use is a part of what?
Answer: Job preparation. ✔ Anticipating other tasks or problems does what? Answer:
Sharply reduces the number of emergencies. ✔ Making job planning a group effort does
what? Answer: Improves productivity. ✔ The NEC identifies environments that contain
flammable vapors and gases as which class of hazardous location? Answer: Class I. ✔
What reduces high voltages and currents to safe values for measurements? Answer:
Instrument transformers. ✔ What is always required when working in a confined space?
Answer: Continuous air monitoring. ✔ Oxygen deficiency occurs when the oxygen level
is less than what by volume? Answer: 19.5% by volume. ✔ Where is the best place to
find out what personal protective gear is necessary when working with a chemical?
Answer: MSDS or SDS. ✔ The lack of an unpleasant odor in a manhole, lift station or
other structures does not always mean that dangerous gases are not present because
why? Answer: Some dangerous gases have no odor. ✔ What is the first step to take

, when preparing to perform maintenance or repairs on an operating piece of
equipment? Answer: Notify all affected employees that equipment is going to be locked
out and explain the reason for the lock out. ✔ Rubber safety gloves should be tested
how often? Answer: Every 6 months. ✔ Rubber safety blankets should be tested how
often? Answer: Every 12 months. ✔ What is the interrupting current of a GFIC
receptacle? Answer: 5-6 mA. ✔ What type of stepladder is forbidden while working on
electrical equipment? Answer: Aluminum. ✔ What is the killer of electrical shock?
Answer: Current. ✔ The relationship between an electric current and a magnetic field is
called what? Answer: Electromagnetism. ✔ An on-off switch with overload relays is
called what? Answer: Manual starter. ✔ The amount of potential difference a layer of
insulation can withstand is called what? Answer: Dielectric strength. ✔ What is the
current in amperes of a 120-volt circuit with a resistance of 60 ohms, using Ohm's law?
Answer: 2.0 amperes. ✔ What is the current of a 120-volt circuit with a 1440-watt load?
Answer: 12 amperes ✔ What is the current of a circuit that consumes 625 watts
through a 12.75-ohm resistor? Answer: 7 amperes. ✔ A wet well measures 30 feet
deep, 25 feet wide and 35 feet long. What is the capacity in gallons? Answer: 196,350
gal. ✔ What is the amp-load of a three-phase, 0.5-hp, 230-volt motor with an efficiency
rating of 92% and a power factor of 80%? Answer: 1.27 amps. ✔ A three-phase,
460-volt motor draws a current of 52 amperes. The motor has an efficiency rating of
94% and power factor of 80%. What is the horsepower? Answer: 41.7 hp. ✔ A holding
tank requires chlorination to 2.5ppm. The tank holds 3.5MGal. How many pounds of
chlorine will be needed? Answer: 73 lbs. ✔ What is the correct name for "voltage" or
electromotive force? Answer: Potential difference. ✔ A rate of flow of one coulomb per
second is called what? Answer: One ampere. ✔ The NEC defines a qualified person as
some who? Answer: Is familiar with equipment operations and hazards. ✔ The
insulation in a capacitor is called what? Answer: Dielectric. ✔ What kinds of bearings
are used when a motor is to be mounted horizontally? Answer: Radial. ✔ Wires and
cables can be classified according to their what? Answer: Covering. ✔ With what kind of
equipment makes a PM effective? Answer: Up to standard. ✔ How can cathodic
protection be achieved? Answer: Impressed current and galvanic anodes. ✔ A power
installation drawing shows what? Answer: Power outlets. ✔ Dual-voltage motors are
connected how? Answer: Either Y-or Delta-connected. ✔ A parking lot has a bank of ten
400W lights that operate 10hrs a day and a 150W sign that operates all day. What is
the electric cost for 30 days at $0.095 per kilowatt hour? Answer: $124.26. ✔ Predictive
maintenance can be best described as? Answer: Taking measurements on equipment
under operating conditions in order to detect symptoms that are not in line with
predetermined parameters and classify the causes. ✔ When working with electricity, it
is especially important to inspect tools for what? Answer: Damaged insulation. ✔ When
a flow meter does not read properly, what should you check? Answer: Power to a
circuit, primary element, and transmitter/receiver. ✔ What category rating on a meter
would be used on service drop? Answer: Cat 4. ✔ What category rating on a meter
would be used on protected electronic equipment? Answer: Cat 1. ✔ The supply of
spare parts, tools, and test instruments should be monitored by who? Answer: The
inventory control operation. ✔ What is the best choice of work clothing fabric when

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