DHI Continuing Education Exam

DHI Continuing Education Exam

Course Number: 04-1018

DHI CONTINUING EDUCATION

Understanding Special Purpose Doors and Windows

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1.  What codes impact the use of special purpose openings?

A.  ADA (American Disability Act)

B.  Local Building Codes

C.  Group and division occupancy – NFPA

D.  All of the above

2.  What dictates the use of special purpose openings?

A.  OSHA standards (Occupational Safety and Hazards Agency)

B.  Specific environmental and/or performance needs

C.  U.S., State or Local regulatory requirements such as Defense Intelligence Agency

D.  All of the above

3.  Why has Positive Pressure Testing replaced previously used testing?

A.  Previous Negative Pressure Testing was too stringent

B.  Previous testing did not simulate conditions encountered in an actual fire.

C.  Previous Negative Pressure Testing subjected specimens to positive pressure at height above 40” AFF

D.  Positive Pressure testing requires a fire hose test

4.  What is a common mistake made when specifying acoustical doors and windows?

A.  Under-specifying the STC of the sound wall and over-specifying the STC of the door

B.  Specifying a wall structurally unable to support the weight of an acoustical door

C.  No provision for sound wall to have fully caulked joint at the floors, electrical boxes, HVAC vents and other wall components.

D.  All of the above

5.  What is the difference between Blast-resistant and Pressure-resistant?

A.  They are interchangeable terms used to refer to the same thing.

B.  Pressure-resistance refers to a pressure load applied over a long duration while blast- resistance refers to a high pressure shock of very short duration

C.  Pressure-resistance refers to pressure decay over a long duration of time, while Blast-resistance refers to pressures decaying with distance and time

D.  Both B and C

6.  What installations benefit from using Blast and Pressure-resistant doors and windows?

A.  Refineries

B.  Research Labs and Testing Facilities

C.  Banks

D.  All of the above

7.  In Bullet-resistant products, what does standard UL752 represent?

A.  It is a standard for materials, devices, and fixtures used to form bullet-resistant barriers which protect against robbery or holdup.

B.  It is a standard that signifies various levels of protection from complete bullet penetration, passage of fragments, and spalling.

C.  It is a standard that applies to doors, windows, teller fixtures, communication ports and other parts designated as part of a certified bullet-resistant assembly.

D.  All of the above

8.  How can Radio Frequency Shielding be achieved?

A.  A six-sided enclosure (four walls + ceiling + floor) with all interfacing connections (joints, seams, thresholds, frames, etc.) that are 100% electrically bonded

B.  Interfacing, conductive surfaces on the ceiling, floors, walls, door and frame, forming an impermeable radio frequency enclosure

C.  Shielding material in walls could be of welded steel of various gages, metal panels consisting of 24 gauge sheet steel laminated to particle board, foil faced drywall, or metallized non-woven fabric (Saf-N-60) applied like wallpaper

D.  All of the above

9.  What is a common mistake made when specifying Stainless Steel doors?

A.  Specifying carbon steel reinforcements, stiffened cores or cladding stainless steel over a hallow metal door

B.  Failing to specify construction of mitered, fully welded and polished corners

C.  Failing to specify fully welded, polished seamless door edges

D.  All of the Above

10.  What is a common mistake made when specifying Thermal Break doors?

A.  Forgetting to specify that test results should be based on an operable assembly

B.  Specifying U and R value but neglecting to specify an air infiltration level

C.  Specifying hardware items that conflict with the thermal break

D.  All of the above

11.  In Acoustical STC testing, what is the difference between ASTM E-90 and ASTM 336?

A.  There is no difference they are both the same test.

B.  ASTM E-90 is lab test and ASTM 336 is a field test.

C.  ASTM E-90 confirms the test specimen’s STC performance while ASTM 336 confirms the actual installation’s STC performance.

D.  Both B and C

12.  What is the difference between seating pressure and unseating pressure?

A.  Seating pressure is countered by blast resistant doors, and unseating pressure is countered by pressure resistant doors

B.  Seating pressure seats the door into the frame and stops, unseating pressure unseats the door away from the frame and stops.

C.  Seating pressure deals with dynamic pressure and unseating pressure deals with static equivalent pressure.

D.  All of the above.

13.  How many bullet resistant levels does UL752 comprise of?

A.  2 levels

B.  5 levels

C.  6 levels

D.  8 levels

14.  Why is Radio Frequency Shielding a necessity in certain buildings?

A.  Because RF waves can detonate explosives

B.  Because RF waves can be used to conduct electronic eavesdropping

C.  Because RF waves can interrupt with operation of medical equipment

D.  All of the above

15.  What precautions need to be made to prevent Stainless Steel corrosion?

A.  Do not allow Stainless Steel to come in contact with any other ferrous metals

B.  Use Stainless Steel components (screws, bolts, etc.)

C.  Use only cleaning solutions that contain hydrochloric acid

D.  Both A and B

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