Glowacki & Sommers (RCIS Questions) QUESTIONS| WITH COMPLETE SOLUTIONS
RCSI
1. What is the primary purpose of ACCA Manual J?
A. Size ductwork
B. Size heating and cooling equipment
C. Determine equipment efficiency
D. Select refrigerant type
Answer: B
Solution: Manual J is used to calculate heating and cooling loads so equipment is sized
correctly. Duct sizing is Manual D.
2. What happens when an air conditioner is oversized for the space?
A. Better humidity control
B. Longer equipment life
C. Short cycling and poor dehumidification
D. Lower energy costs
Answer: C
Solution: Oversized units cycle on and off too quickly, reducing humidity removal and
increasing wear.
3. What is the recommended airflow per ton of cooling for most residential systems?
A. 250 CFM
B. 300 CFM
C. 400 CFM
D. 600 CFM
Answer: C. 400 CFM
Solution: Standard design airflow is approximately 400 CFM per ton of cooling.
4. A 3-ton air conditioner should move approximately how much air?
A. 800 CFM
B. 1,000 CFM
C. 1,200 CFM
D. 1,600 CFM
, Answer: C. 1,200 CFM
Solution:
3 tons × 400 CFM/ton = 1,200 CFM
5. Which duct material has the highest airflow resistance?
A. Sheet metal
B. Fiberglass duct board
C. Flexible duct
D. PVC duct
Answer: C
Solution: Flexible duct has the highest friction loss, especially when not fully stretched.
6. What is static pressure measured in?
A. PSI
B. Inches of mercury
C. Inches of water column
D. Pascals
Answer: C
Solution: HVAC static pressure is measured in inches of water column (in. w.c.).
7. What is the maximum recommended total external static pressure (TESP) for most
residential air handlers?
A. 0.1 in. w.c.
B. 0.3 in. w.c.
C. 0.5 in. w.c.
D. 1.0 in. w.c.
Answer: C. 0.5 in. w.c.
Solution: Most residential systems are designed for a maximum of 0.5 inches w.c.
8. What tool is used to measure static pressure?
A. Multimeter
B. Manometer
C. Psychrometer
D. Micron gauge
RCSI
1. What is the primary purpose of ACCA Manual J?
A. Size ductwork
B. Size heating and cooling equipment
C. Determine equipment efficiency
D. Select refrigerant type
Answer: B
Solution: Manual J is used to calculate heating and cooling loads so equipment is sized
correctly. Duct sizing is Manual D.
2. What happens when an air conditioner is oversized for the space?
A. Better humidity control
B. Longer equipment life
C. Short cycling and poor dehumidification
D. Lower energy costs
Answer: C
Solution: Oversized units cycle on and off too quickly, reducing humidity removal and
increasing wear.
3. What is the recommended airflow per ton of cooling for most residential systems?
A. 250 CFM
B. 300 CFM
C. 400 CFM
D. 600 CFM
Answer: C. 400 CFM
Solution: Standard design airflow is approximately 400 CFM per ton of cooling.
4. A 3-ton air conditioner should move approximately how much air?
A. 800 CFM
B. 1,000 CFM
C. 1,200 CFM
D. 1,600 CFM
, Answer: C. 1,200 CFM
Solution:
3 tons × 400 CFM/ton = 1,200 CFM
5. Which duct material has the highest airflow resistance?
A. Sheet metal
B. Fiberglass duct board
C. Flexible duct
D. PVC duct
Answer: C
Solution: Flexible duct has the highest friction loss, especially when not fully stretched.
6. What is static pressure measured in?
A. PSI
B. Inches of mercury
C. Inches of water column
D. Pascals
Answer: C
Solution: HVAC static pressure is measured in inches of water column (in. w.c.).
7. What is the maximum recommended total external static pressure (TESP) for most
residential air handlers?
A. 0.1 in. w.c.
B. 0.3 in. w.c.
C. 0.5 in. w.c.
D. 1.0 in. w.c.
Answer: C. 0.5 in. w.c.
Solution: Most residential systems are designed for a maximum of 0.5 inches w.c.
8. What tool is used to measure static pressure?
A. Multimeter
B. Manometer
C. Psychrometer
D. Micron gauge
