Author Question: What type of thread does a 2 3/8 NF-24 bolt have? A) National fine, 24 ft-lb of torque B) ... (Read 16 times)

cabate · **on:** Jul 24, 2018

What type of thread does a 2 3/8 NF-24 bolt have?

A) National fine, 24 ft-lb of torque B) National fine, 24 threads per inch
C) National coarse, 24 threads per inch D) Normal capacity, 24 ft-lb of torque

Question 2

A common use for wood screws in HVACR work is:

A) Supporting flex duct by screwing it directly to floor joists.
B) Connecting sheet-metal ductwork together.
C) Fastening power wires to floor joists.
D) Attaching hanging straps to wooden structures.