RESNET HERS National Rater Test

Question 1

A HERS Rater is performing a blower door test on a 2,500 sq ft house with 8-foot ceilings. The final reading on the manometer is 1,800 CFM50. What is the approximate Air Changes per Hour at 50 Pascals (ACH50)?

4.82 ACH50 5.40 ACH50 6.00 ACH50 7.20 ACH50

Correct Answer:

5.40 ACH50

Question 2

According to ANSI/RESNET/ICC 380, what is the standard pressure difference that must be induced across the building envelope for a single-point blower door test?

25 Pascals 75 Pascals 50 Pascals 100 Pascals

Correct Answer:

50 Pascals

Question 3

When performing a duct leakage to outside test, what is the primary function of the blower door?

To pressurize the duct system to 50 Pa while the duct tester measures leakage. To create a neutral pressure plane between the house and the outdoors. To pressurize or depressurize the house to the same pressure as the duct system (typically 25 Pa). To measure the total building envelope leakage simultaneously with the duct leakage.

Correct Answer:

To pressurize or depressurize the house to the same pressure as the duct system (typically 25 Pa).

Question 4

A HERS Rater is preparing a home for a blower door test according to RESNET standards. Which of the following should be done to prepare the house?

Seal all HVAC supply and return registers with tape. Close and latch exterior windows and doors, but do not apply extra sealing. Turn off the water heater and seal its flue vent. Close all interior doors to isolate each room.

Correct Answer:

Close and latch exterior windows and doors, but do not apply extra sealing.

Question 5

Which of the following scenarios describes a 'Total Duct Leakage' test?

A test using both a blower door and a duct tester to measure leaks to the attic and crawlspace. A test performed at the rough-in stage before drywall is installed. A test that measures all the air leaking from the duct system, regardless of whether it leaks into conditioned or unconditioned space. A test where the duct system is pressurized to 50 Pa and compared against the building's CFM50 value.

Correct Answer:

A test that measures all the air leaking from the duct system, regardless of whether it leaks into conditioned or unconditioned space.

Exam overview

About this Exam

Prepare with the RESNET HERS National Rater Test practice quiz. This question bank includes 30 questions covering rater, combustion, performing, leakage, and blower. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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RESNET HERS National Rater Test

This practice set contains 30 questions from the matching question bank and focuses on rater, combustion, performing, leakage, and blower. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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RESNET HERS National Rater Test

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