CDFA MEASUREMENT VERIFICATION
PRACTICE FINAL COMPREHENSIVE
ASSESSMENT TEST PAPER QUESTIONS AND
SOLUTIONS
⩥ What is the temperature range of electric metering components if not
stated on the device.
Answer: -20° C to 50° C
-4° F to 122° F
⩥ Who would amend NCWM for proposed changes to electric watt hour
meter requirements?.
Answer: Committee on Specifications and Tolerances
⩥ What is the purpose of CCR section 4000 in H44.
Answer: Commercial weighting and measuring devices shall conform to
the latest requirements set forth in the National Institute of Standards
and Technology Handbook 44
⩥ The components of an electric meter system shall be designed so that.
Answer: the internal mechanism cannot be accessed without destroying
a seal
,⩥ What is the applied test load for a full load test.
Answer: the marked test amperage (TA)
⩥ Which are not units of a rigid liquid measure?
a. 1 gill b. 1 1/2 gal c. 1 cup d. 1 liter.
Answer: c. 1 cup
⩥ What is the draft size of a 5/8 inch utility water meter?.
Answer: 50 gal
⩥ If conducting slow flow test on a loading rack meter with maximum
marked discharge of 1500 gpm and minimum marked discharge of 300
gpm, the product is diesel fuel, and the maximum discharge rate that can
be developed during the normal test is 1000 gpm, then the special test
must be conducted at?.
Answer: 1500 gpm x 0.20= 300 gpm
Answer= 300 gpm
⩥ The minimum discharge rate for wholesale LPG shall not exceed.
Answer: 20 % of the marked maximum discharge rate
⩥ The minimum discharge rate for stationary retail LPG shall not
exceed.
,Answer: 5 gpm
⩥ What are the possible units for carbon dioxide liquid measuring
devices..
Answer: LB or KG
⩥ What is the value o f the smallest unit for small delivery carbon
dioxide liquid measuring devices.
Answer: 1 lb or 1 kg
⩥ What are the units for cryogenic liquid measuring devices.
Answer: kg or lb, liters or gal at normal boiling point
AND
m^3 or ft ^3 at normal T and P (70° F and 101° kPa)
⩥ Which deals with putting devices into service.
Answer: HB 44
⩥ During LPG testing when do you take temperature readings at the
meter.
Answer: at 30% and 70% prover capacity
, ⩥ During LPG testing when do you take temperature readings at the
prover.
Answer: at the end
⩥ When do you start the 30 sec timer when draining LPG provers.
Answer: When the pump changes rpm on dry bottom provers and when
liquid reaches the bottom of the sight glass in wet bottom provers
⩥ The EPO does not include standard testing of what?.
Answer: Domestic cold water meters
⩥ What are the inserts in Ch. 1 of the field reference manual that are
boxed, outlined and shaded?.
Answer: They are applicable to the section they are inserted into but not
an HB 44 requirement
⩥ When testing gravimetrically it is important to know.
Answer: Density and coefficient of expansion
⩥ When first connect prover to LPG meter there is 10 psi difference in
pressure between the meter and prover. When begin testing the
difference increases to 25 psi. What is done? (DOUBLE CHECK THIS).
Answer: stop testing
PRACTICE FINAL COMPREHENSIVE
ASSESSMENT TEST PAPER QUESTIONS AND
SOLUTIONS
⩥ What is the temperature range of electric metering components if not
stated on the device.
Answer: -20° C to 50° C
-4° F to 122° F
⩥ Who would amend NCWM for proposed changes to electric watt hour
meter requirements?.
Answer: Committee on Specifications and Tolerances
⩥ What is the purpose of CCR section 4000 in H44.
Answer: Commercial weighting and measuring devices shall conform to
the latest requirements set forth in the National Institute of Standards
and Technology Handbook 44
⩥ The components of an electric meter system shall be designed so that.
Answer: the internal mechanism cannot be accessed without destroying
a seal
,⩥ What is the applied test load for a full load test.
Answer: the marked test amperage (TA)
⩥ Which are not units of a rigid liquid measure?
a. 1 gill b. 1 1/2 gal c. 1 cup d. 1 liter.
Answer: c. 1 cup
⩥ What is the draft size of a 5/8 inch utility water meter?.
Answer: 50 gal
⩥ If conducting slow flow test on a loading rack meter with maximum
marked discharge of 1500 gpm and minimum marked discharge of 300
gpm, the product is diesel fuel, and the maximum discharge rate that can
be developed during the normal test is 1000 gpm, then the special test
must be conducted at?.
Answer: 1500 gpm x 0.20= 300 gpm
Answer= 300 gpm
⩥ The minimum discharge rate for wholesale LPG shall not exceed.
Answer: 20 % of the marked maximum discharge rate
⩥ The minimum discharge rate for stationary retail LPG shall not
exceed.
,Answer: 5 gpm
⩥ What are the possible units for carbon dioxide liquid measuring
devices..
Answer: LB or KG
⩥ What is the value o f the smallest unit for small delivery carbon
dioxide liquid measuring devices.
Answer: 1 lb or 1 kg
⩥ What are the units for cryogenic liquid measuring devices.
Answer: kg or lb, liters or gal at normal boiling point
AND
m^3 or ft ^3 at normal T and P (70° F and 101° kPa)
⩥ Which deals with putting devices into service.
Answer: HB 44
⩥ During LPG testing when do you take temperature readings at the
meter.
Answer: at 30% and 70% prover capacity
, ⩥ During LPG testing when do you take temperature readings at the
prover.
Answer: at the end
⩥ When do you start the 30 sec timer when draining LPG provers.
Answer: When the pump changes rpm on dry bottom provers and when
liquid reaches the bottom of the sight glass in wet bottom provers
⩥ The EPO does not include standard testing of what?.
Answer: Domestic cold water meters
⩥ What are the inserts in Ch. 1 of the field reference manual that are
boxed, outlined and shaded?.
Answer: They are applicable to the section they are inserted into but not
an HB 44 requirement
⩥ When testing gravimetrically it is important to know.
Answer: Density and coefficient of expansion
⩥ When first connect prover to LPG meter there is 10 psi difference in
pressure between the meter and prover. When begin testing the
difference increases to 25 psi. What is done? (DOUBLE CHECK THIS).
Answer: stop testing
