_____ are used to join pipes made of different materials.

_____ are used to join pipes made of different materials.
 
  A) Cleanout fittings
  B) Adapters
  C) Sanitary tees
  D) Vent ells

---

[Ques. 2] _____ bends are not available for cast-iron pipe.
 
  A) Double 1/4
  B) Short sweep 1/4
  C) Triple 1/4
  D) Long sweep 1/4

---

[Ques. 3] The speed of a three-phase squirrel cage induction motor is controlled by the frequency of the applied voltage
  and _____.
 
  a. voltage dropping resistors
  b. the number of poles
  c. full-load torque
  d. armature current

---

[Ques. 4] The NEC requires motor disconnecting means be _____.
 
  a. 8 feet or more above the floor
  b. within sight of the controller location
  c. guarded
  d. installed so access is limited to qualified persons

---

[Ques. 5] Water supply fittings are designed so they have a _____ radius _____ ledges.
 
  A) short; with
  B) short; without
  C) long; with
  D) long; without