Ace 2026-2027 Includes Frequently Tested Questions
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SOLUTIONS
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1. What is the sum of gauge pressure and atmospheric pressure called?
A. PSIG
B. PSID
C. PSIA
D. Vacuum pressure
Correct Answer: C. Pounds per Square Inch Absolute (PSIA)
2. What is standard atmospheric pressure at sea level?
A. 10.3 PSIA
B. 12.5 PSIA
C. 14.7 PSIA
D. 16.0 PSIA
Correct Answer: C. 14.7 PSIA
3. What does a differential pressure gauge measure?
A. Absolute pressure
B. Atmospheric pressure
C. Pressure difference between two points
D. Vacuum pressure
Correct Answer: C. Difference between two points (PSID)
4. What is the function of a duplex gauge?
A. Measures vacuum
B. Measures pressure at one point
C. Displays pressure from two points simultaneously
,D. Measures temperature
Correct Answer: C. Measures pressure from two points
5. What does a vacuum gauge measure?
A. Pressure above atmospheric
B. Absolute pressure
C. Pressure below atmospheric
D. Flow rate
Correct Answer: C. Pressure lower than atmospheric pressure
6. What does a compound gauge measure?
A. Only vacuum
B. Only pressure
C. Both above and below atmospheric pressure
D. Differential pressure
Correct Answer: C. Both above and below atmospheric pressure
7. What does a simplex gauge measure?
A. Two pressures
B. Vacuum only
C. Pressure at one location
D. Temperature
Correct Answer: C. Pressure from one location
8. Which gauge uses two Bourdon tubes and one needle?
A. Duplex gauge
B. Simplex gauge
C. Differential gauge
D. Compound gauge
Correct Answer: C. Differential gauge
9. Which gauge uses two Bourdon tubes and two needles?
A. Differential gauge
, B. Duplex gauge
C. Compound gauge
D. Simplex gauge
Correct Answer: B. Duplex gauge
10. Vacuum pressure is commonly measured in:
A. PSI
B. PSIA
C. Inches of water or inches of mercury (InHg)
D. Bar
Correct Answer: C. Inches of water or InHg
11. Which measuring device uses two dissimilar metals?
A. Pyrometer
B. Liquid thermometer
C. Bimetallic thermometer
D. Digital sensor
Correct Answer: C. Bimetallic expansion
12. Which thermometer is also known as a distant reading thermometer?
A. Liquid-in-glass
B. Thermocouple
C. Filled system thermometer
D. Infrared
Correct Answer: C. Filled system thermometer
13. What are the main components of a filled system thermometer?
A. Sensor and display only
B. Bulb, capillary tube, Bourdon tube
C. Wire and sensor
D. Liquid column
Correct Answer: B. Bulb, tube, and Bourdon tube