Latest TLE Reviewer 18

1. Which of the following uses is permitted by the code to be used  for surface non-metallic raceway?

A. Dry location

B. Where concealed

C. Where subject to physical damage

D. Where voltage is over 300v

ANS: A

2. Service entrance using copper conductors shall have sufficient capacity and shall not be smaller than ________.

A. 5.5mm

B. 3.5mm

C. 14mm

D. 8.0mm

ANS: D

3. If two identical lamps give normal light when connected in parallel in 230v line are reconnected in series in the same, the bulb will ______________.

A. give more light

B. not light

C. give less light

D. blows out

ANS: C

4. When flexible metal conduit is installed as a fixed raceway, it shall be secured within _______ on each side of every outlet box.

A. 250mm

B. 300mm

C. 100mm

D. 150mm

ANS: B

5. A short circuit can be detected by using_________ .

A.  an ohmmeter

B. a meggar

C. an oscillscope

D. an ammeter

ANS: A

6. The electrical plants for residential house include the following items EXCEPT one. Which one is this?

A. substation plan

B. location plan

C. floor plan showing location service

D. Layout of wiring paln for general lightning and receptacles outlets

ANS: A

7. If installed in raceway, conductors of size _____ and larger shall be stranded.

A. 5.5mm

B. 8.0mm

C. 14mm

D. 3.5mm

ANS: B

8. At least _______of free conductor shall be left each outlet, junction and switch for splices or connection of fixtures o devices.

A. 250mm

B. 175mm

C. 150mm

D. 300mm

ANS: C

9. A certiain residential house has lightning load of 1.1 kVA and a appliance load of 10a at 220v single phase, two wires 60hz. The branch circuit fuse protection for lightning anf appliances loads are ______ and_______, respective ly

A. 20A and 60A

B. 20 and 30

C. 15A and 30A

D. 15A and 20A

ANS: D

10. Live vegetation or trees _________ used for support of overhead conductors spans.

A. shall be

B. should be

C. shall not be

D. should not be

ANS: C

11. Light fixtures suspended from the ceiling by chains should wire so that the wires ______________ .

A. will be grounded

B. will not touch the chains

C. will support the fixture

D. will not support fixture

ANS: D

12. In rigid metal conduit wiring conduit of 15-20 mm diameter shall be supported at least every _________.

A. 2 500mm

B. 3 500mm

C. 1 800mm

D. 3 000mm

ANS: D

13. Why do conductors need additional wiring insulators?

A. electrical wiring needs to be protected from mechanical harm

B. wires are connected by joints therefore needs reinsulations

C. wire touches wood surface therefore need protection

D. wires skin is weak

ANS: A

14. What is the total number of mechanical degrees that electrical pipe run maybe bent between pull points?

A. 360 degrees

B. 180 degrees

C. 120 degrees

D. 270 degrees

ANS: A

15. Rigid non-metallic conduit shall be supported within ______ of each box cabinet or other termination.

A. 600mm

B. 800mm

C. 900mm

D. 760mm

ANS: C

16. Electrical metallic tubing smaller than ___ electrical trade size shall NOT be used.

A. 12mm

B. 10mm

C. 15mm

D. 20mm

ANS: C

17. Type AC cable shall be secured by approved staples, straps, hanger or similar fitting at intervals NOT exceeding ________ .

A. 1 250mm

B. 1 300mm

C. 1 500mm

D. 1 000mm

ANS: B

18. In concealed knob and tubewiring the clearance to be maintainde between conductors is _______ .

A. 65mm

B . 45mm

C. 76mm

D. 50mm

ANS: C

19. Three bulbs are connected in parallel and controlled by a single switch. If one of the three 3 bulbs is busted, what will happen to the remaining bulbs.

A. Will not lit

B. Its brightness is reduced

C. its brightness increases

D. its birghtness is maintiained.

ANS: D

20. Which is a synchronous alternating-current machine that changes mechanical power into electrical power?

A. dynamo

B. Motor

C. Alternator

D. Lathe machine

ANS: C

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