DHT ACTUAL EXAM QUESTIONS AND ANSWERS

DHT ACTUAL EXAM QUESTIONS AND ANSWERS
An asterisk (*) following a section number in NFPA 80 indicates what? - CORRECT
ANSWER✅✅✅There are explanatory comments in the annex



What is the typical anchor type used on a knocked-down drywall frame?

Compression

Steel Stud

Multipupose

Wood Stud - CORRECT ANSWER✅✅✅Compression



What is the rabbet dimension of an equal rabbeted frame for a 1-3/4-inch wood door?

1 9/16"

1 3/16"

1 15/16"

2 1/8" - CORRECT ANSWER✅✅✅1 15/16"



What is the maximum hourly fire rating available for a flush solid core wood door?

45 min

3 hour

60 min

90 min - CORRECT ANSWER✅✅✅90 min



On a secure right hand swing opening, removable glazing bead on doors or sidelight frames should be
installed on the...

Push or Pull

Push side of the opening

cooridor side of the opening

pull side of the opening - CORRECT ANSWER✅✅✅Pull side of the opening

, Blast resistant doors ratings are measured in units of...

PSI

Grades

Levels

PSL - CORRECT ANSWER✅✅✅PSI



When using an electric strike on a fire rated openings, the strike must be...

Normally Open

Fail Secure

Fail Safe

Fail Open - CORRECT ANSWER✅✅✅Fail Secure



In order to change higher AC voltage to a lower AC voltage you must use a...

Power Supply

Rectifier

Transformer

Switch - CORRECT ANSWER✅✅✅Transformer



Rectifier - CORRECT ANSWER✅✅✅Changes alternating current(AC) to direct current (DC)



Switch - CORRECT ANSWER✅✅✅A device for making, breaking, or changing the connections in an
electrical circuit.



Voltage drop is affected by the length and gauge of conductors used in a system.

True

False - CORRECT ANSWER✅✅✅True



What is the proper term for an 8" high protection plate that is mounted on the pull side of a door?

Kick Plate