MEP SYSTEMS I (COSC 325) ELECTRICAL EXAM – HOUSTON
NEWEST ACTUAL EXAM COMPLETE 150 REAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
What is the typical rating for residential circuit breakers? (20-
441) - ANSWER-
115 V for single pole
230 V for double pole
What is a fast-acting receptacle that detects low levels of
leaking current to ground and opens the circuit in response to
the leakage? (20-441) – ANSWER-Ground Fault Circuit
Interrupter (GFCI)
What are the three typical shapes of receptacle boxes used in
residential applications? (26-556) - ANSWER-Square (Switches
and Receptacles, Junction Boxes)
Octagonal (In ceilings for lighting fixtures, Junction Boxes)
Rectangular (Junction Boxes)
,What is a round indentation punched into the metal of a box
and held in place by narrow unpunched narrow strips of metal?
(26-557) - ANSWER-Knockout (KO)
How much wire should extend beyond the bottom of the box to
allow for enough wire for making connections to receptacles
and switches? (26-558) – ANSWER-8"
How do you ensure you are obtaining the proper length of NM
cable required? (26-559) - ANSWER-Pull it into position before
cutting
Cable and conductors should be _______ before being installed
in a box. (26559) - ANSWER-Stripped
What is the most common way of routing NM cable? (26-560) –
ANSWER-Running it through stud walls and through floor joists
through drilled holes
Type NM cable may be used in masonry walls only if what?
Then what do you use? (26-560) - ANSWER-No moisture is
present and the wall is above grade
Type NMC Cable
, Can NM and NMC cable be embedded in poured concrete,
concrete, or aggregate? (26-560) - ANSWER-No
When must NM and NMC be supported or secured (stapled)?
(26-560) - ANSWER-Every 4 1/2 feet or within 12" of a box
What are the three widely accepted methods of properly
residential grounding?
(26-560) - ANSWER-Component
Pigtail
Clip
How are cables secured to outlet boxes? (26-562) - ANSWER-
Clamps
What are the three types of clamps typically available for
nonmetallic cables?
(26-562) - ANSWER-Saddle
Straight
Cable
What is a type of cable that consists of two or more individually
insulated wires protected by a flexible metal outer jacket? (26-
563) - ANSWER-MetallicSheathed Cable
NEWEST ACTUAL EXAM COMPLETE 150 REAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
What is the typical rating for residential circuit breakers? (20-
441) - ANSWER-
115 V for single pole
230 V for double pole
What is a fast-acting receptacle that detects low levels of
leaking current to ground and opens the circuit in response to
the leakage? (20-441) – ANSWER-Ground Fault Circuit
Interrupter (GFCI)
What are the three typical shapes of receptacle boxes used in
residential applications? (26-556) - ANSWER-Square (Switches
and Receptacles, Junction Boxes)
Octagonal (In ceilings for lighting fixtures, Junction Boxes)
Rectangular (Junction Boxes)
,What is a round indentation punched into the metal of a box
and held in place by narrow unpunched narrow strips of metal?
(26-557) - ANSWER-Knockout (KO)
How much wire should extend beyond the bottom of the box to
allow for enough wire for making connections to receptacles
and switches? (26-558) – ANSWER-8"
How do you ensure you are obtaining the proper length of NM
cable required? (26-559) - ANSWER-Pull it into position before
cutting
Cable and conductors should be _______ before being installed
in a box. (26559) - ANSWER-Stripped
What is the most common way of routing NM cable? (26-560) –
ANSWER-Running it through stud walls and through floor joists
through drilled holes
Type NM cable may be used in masonry walls only if what?
Then what do you use? (26-560) - ANSWER-No moisture is
present and the wall is above grade
Type NMC Cable
, Can NM and NMC cable be embedded in poured concrete,
concrete, or aggregate? (26-560) - ANSWER-No
When must NM and NMC be supported or secured (stapled)?
(26-560) - ANSWER-Every 4 1/2 feet or within 12" of a box
What are the three widely accepted methods of properly
residential grounding?
(26-560) - ANSWER-Component
Pigtail
Clip
How are cables secured to outlet boxes? (26-562) - ANSWER-
Clamps
What are the three types of clamps typically available for
nonmetallic cables?
(26-562) - ANSWER-Saddle
Straight
Cable
What is a type of cable that consists of two or more individually
insulated wires protected by a flexible metal outer jacket? (26-
563) - ANSWER-MetallicSheathed Cable
