NATE GAS HEATING EXAM 50 QUESTIONS AND ANSWERS UPDATED 2026 VERIFIED ANSWERS ACTUAL UPDATED PRACTICE QUESTIONS HIGH YIELD STUDY GUIDE CERTIFICATION EXAM PREPARATION GRADED A+

NATE GAS HEATING EXAM 50 QUESTIONS AND
ANSWERS UPDATED 2026 VERIFIED ANSWERS
ACTUAL UPDATED PRACTICE QUESTIONS HIGH
YIELD STUDY GUIDE CERTIFICATION EXAM
PREPARATION GRADED A+


50 real exam questions
Since 1992, the United States Department of Energy has required that
all furnaces sold and installed from that date on must have an AFUE
of no less than:


A: 70%


B: 75%


C: 78%


D: 80% - CORRECT ANSWER -C: 78%


Many pre-1992 furnaces have efficiencies around _______.


A: 10%


B: 40%


C: 60%

,D: 80% - CORRECT ANSWER -C: 60%


Today, furnaces with AFUE ratings greater than _____ are available.


A: 85%


B: 90%


C: 100%


D: 110% - CORRECT ANSWER -B: 90%


A thermocouple is used with:


A: Intermittent pilot systems


B: Direct spark ignition systems


C: Glow coil ignition systems


D: Standing pilot ignition systems - CORRECT ANSWER -D:
Standing pilot ignition systems


The purpose of the gas pressure regulator is to:

, A: Keep the color of the flame constant


B: Keep the high limit switch from tripping


C: Maintain a constant gas pressure at the burner


D: Allow the gas valve to operate smoothly and accurately -
CORRECT ANSWER -C: Maintain a constant gas pressure at the
burner


The instrument used to measure outlet gas pressure is the:


A: Velometer


B: Anemometer


C: Monometer


D: Draft gauge - CORRECT ANSWER -C: Monometer


The regulator on a natural gas furnace should be adjusted to supply
_____ inches of pressure at the burners.


A: 11"