CDFA Exam (latest update 2025-2026)
Measurement Verification Practice
questions with correct verified answers
{Grade A}
When is a service agent not required to notify the sealer of an adjustment to a device
according to B&P Code Section 12515? - correct answer When the adjustment is only
for the purpose of maintaining the device in a zero balance condition
What is the temperature range of electric metering components if not stated on the
device - correct answer -20° C to 50° C
-4° F to 122° F
Who would amend NCWM for proposed changes to electric watt hour meter
requirements? - correct answer Committee on Specifications and Tolerances
What is the purpose of CCR section 4000 in H44 - correct 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 - correct
answer the internal mechanism cannot be accessed without destroying a seal
What is the applied test load for a full load test - correct 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 - correct answer c. 1 cup
What is the draft size of a 5/8 inch utility water meter? - correct 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? - correct answer
1500 gpm x 0.20= 300 gpm
, CDFA Exam (latest update 2025-2026)
Measurement Verification Practice
questions with correct verified answers
{Grade A}
Answer= 300 gpm
The minimum discharge rate for wholesale LPG shall not exceed - correct answer 20
% of the marked maximum discharge rate
The minimum discharge rate for stationary retail LPG shall not exceed - correct
answer 5 gpm
What are the possible units for carbon dioxide liquid measuring devices. - correct
answer LB or KG
What is the value o f the smallest unit for small delivery carbon dioxide liquid
measuring devices - correct answer 1 lb or 1 kg
What are the units for cryogenic liquid measuring devices - correct 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 - correct answer HB 44
During LPG testing when do you take temperature readings at the meter - correct
answer at 30% and 70% prover capacity
During LPG testing when do you take temperature readings at the prover - correct
answer at the end
When do you start the 30 sec timer when draining LPG provers - correct answer
When the pump changes rpm on dry bottom provers and when liquid reaches the
bottom of the sight glass in wet bottom provers
, CDFA Exam (latest update 2025-2026)
Measurement Verification Practice
questions with correct verified answers
{Grade A}
The EPO does not include standard testing of what? - correct answer Domestic cold
water meters
What are the inserts in Ch. 1 of the field reference manual that are boxed, outlined
and shaded? - correct 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 - correct 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) - correct answer stop testing
Any digital money-value indication and any recorded money value on a computing-
type device shall be in agreement - correct answer to within +/- 1 cent
Technical term for circuit breaker - correct answer Thermal Overload Protector
Electric meter should accurately measure - correct answer 5-100% of service capacity
The rotor or indicator for a meter shall rotate or increment continuously when a load
is applied equal to - correct answer 0.5 ampere
What is not needed to be clearly and permanently marked for general identification
on a measuring device - correct answer address of manufacturer
What shall the range of results be within for multiple tests conducted at
approximately the same flow rate and draft size - correct answer 40% of the
maintenance tolerance
Measurement Verification Practice
questions with correct verified answers
{Grade A}
When is a service agent not required to notify the sealer of an adjustment to a device
according to B&P Code Section 12515? - correct answer When the adjustment is only
for the purpose of maintaining the device in a zero balance condition
What is the temperature range of electric metering components if not stated on the
device - correct answer -20° C to 50° C
-4° F to 122° F
Who would amend NCWM for proposed changes to electric watt hour meter
requirements? - correct answer Committee on Specifications and Tolerances
What is the purpose of CCR section 4000 in H44 - correct 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 - correct
answer the internal mechanism cannot be accessed without destroying a seal
What is the applied test load for a full load test - correct 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 - correct answer c. 1 cup
What is the draft size of a 5/8 inch utility water meter? - correct 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? - correct answer
1500 gpm x 0.20= 300 gpm
, CDFA Exam (latest update 2025-2026)
Measurement Verification Practice
questions with correct verified answers
{Grade A}
Answer= 300 gpm
The minimum discharge rate for wholesale LPG shall not exceed - correct answer 20
% of the marked maximum discharge rate
The minimum discharge rate for stationary retail LPG shall not exceed - correct
answer 5 gpm
What are the possible units for carbon dioxide liquid measuring devices. - correct
answer LB or KG
What is the value o f the smallest unit for small delivery carbon dioxide liquid
measuring devices - correct answer 1 lb or 1 kg
What are the units for cryogenic liquid measuring devices - correct 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 - correct answer HB 44
During LPG testing when do you take temperature readings at the meter - correct
answer at 30% and 70% prover capacity
During LPG testing when do you take temperature readings at the prover - correct
answer at the end
When do you start the 30 sec timer when draining LPG provers - correct answer
When the pump changes rpm on dry bottom provers and when liquid reaches the
bottom of the sight glass in wet bottom provers
, CDFA Exam (latest update 2025-2026)
Measurement Verification Practice
questions with correct verified answers
{Grade A}
The EPO does not include standard testing of what? - correct answer Domestic cold
water meters
What are the inserts in Ch. 1 of the field reference manual that are boxed, outlined
and shaded? - correct 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 - correct 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) - correct answer stop testing
Any digital money-value indication and any recorded money value on a computing-
type device shall be in agreement - correct answer to within +/- 1 cent
Technical term for circuit breaker - correct answer Thermal Overload Protector
Electric meter should accurately measure - correct answer 5-100% of service capacity
The rotor or indicator for a meter shall rotate or increment continuously when a load
is applied equal to - correct answer 0.5 ampere
What is not needed to be clearly and permanently marked for general identification
on a measuring device - correct answer address of manufacturer
What shall the range of results be within for multiple tests conducted at
approximately the same flow rate and draft size - correct answer 40% of the
maintenance tolerance
