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DCDC-002 Questions and Answers

Question # 6

what is the ASHRAE maximum relative humidity recommended.

A.

45%

B.

50%

C.

55%

D.

60%

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Question # 7

What is the minimum separation distance of underground telecommunications and utility cabling in same route?

A.

2 feet minimum along entire route

B.

6 feet minimum along entire route

C.

no need for separation as long as they are enclosed in different conduit systems.

D.

none of the above

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Question # 8

How many air changes an hour inside an equipment room?

A.

0.25

B.

0.50

C.

1.00

D.

1.50

E.

2.00

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Question # 9

what room should the battery room be adjacent to?

A.

the electrical Room

B.

computing Room

C.

Mechanical Room

D.

Security Rooms

E.

Non-combustible materials

F.

all

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Question # 10

What is the minimum aisle width?

A.

3 feet

B.

The width shouldn't exceed more than half room length

C.

Arm span distance between technicians

D.

Twice server cabinet depth

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Question # 11

What is the high temperature that must be maintained in a data center according to TIA-942?

A.

70 degrees

B.

75 degrees

C.

77 degrees

D.

80 degrees

E.

85 degrees

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Question # 12

Where should power cable be ran in an access floor?

A.

Hot aisle

B.

Cold aisle

C.

Above the access floor

D.

Below the access floor

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Question # 13

What is the recommended front of rack aisle width?

A.

2 feet

B.

3 feet

C.

4 feet

D.

5 feet

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Question # 14

What is the appropriate fire rating requirements for a critical media storage room?

A.

1 hour

B.

2 hours

C.

3 hours

D.

4 hours

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Question # 15

where should the vendor storage area be located?

A.

far away from loading dock

B.

inside data center

C.

offsite

D.

adjacent or near secured loading dock

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Question # 16

What is the clearance required for the hot aisle width?

A.

2 ft

B.

4 ft

C.

6 ft

D.

8 ft

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Question # 17

What Enhanced Fujita Scale level is commonly used in wind loading calculations?

A.

EF1,73-112 mph

B.

EF2,113-157mph

C.

EF3,158-206mph

D.

EF4,207-260 mph

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Question # 18

What is an automatic static transfer switch used for?

A.

Switching between multiple utility power sources

B.

Switching between utility and generator power sources

C.

Switching between different generator power sources

D.

Switching between AC and DC power sources

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Question # 19

What are the minimum separation distances for electrical and telecom services pathways to maintain from their primary and redundant feeds?

A.

5 meters (16 feet)

B.

10 meters (33 feet)

C.

15 meters (49 feet)

D.

20 meters (66 feet)

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Question # 20

What is the clearance required between AC units?

A.

Min. of 2 ft but recommended 6 ft.

B.

Min. of 4 ft but recommended 6 ft.

C.

Min. of 6 ft but recommended 8 ft.

D.

Min. of 8 ft but recommended 10 ft.

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Question # 21

According to NEB, what is the recommended range for the low temperature in a data center?

A.

65 degrees

B.

60 degrees

C.

55 degrees

D.

70 degrees

E.

75 degrees

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Question # 22

What is the formula to find the maximum allowable cable depth in a non-solid bottom cable tray?

A.

H = 50/1 + (L * 0.0007)

B.

H = 100/1 + (L * 0.0007)

C.

H = 150/1 + (L * 0.0007)

D.

H = 200/1 + (L * 0.0007)

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Question # 23

According to TIA-942, what is the low temperature that must be maintained in a data center?

A.

60 degrees

B.

65 degrees

C.

68 degrees

D.

70 degrees

E.

75 degrees

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