323

A ___ switch has a set of contacts that are operated by the movement of a piston, bellows, or diaphragm against a set of springs. Select one: a. flow b. limit c. pressure d. none of these

c

A float switch is an example of ___ control device. Select one: a. a manual b. an incremental c. an automatic d. a proximity

c

Figure 321.14 Refer to Figure 321.14. An ohmmeter reading between Points J & M would indicate ___ Ω. Select one: a. 10 to 400 b. OL (or ∞) c. 0 to 0.2

c

Figure 321.14 Refer to Figure 321.14. An ohmmeter reading between Points K & L would indicate ___ Ω. Select one: a. 10 to 400 b. 0 to 0.2 c. OL (or ∞)

c

Figure 323.8 Equipment III, shown in Figure 323.8, is a ___. Select one: a. float switch b. selector switch c. pushbutton station d. limit switch e. none of these

c

Figure 324.47 Refer to Figure 324.47. The current time is 11 pm. When the HOA switch is in the HAND position, the ___ light is energized. Select one: a. green b. white c. both a and b d. neither a nor b

c

Refer to Figure 324.47. The current time is 1 pm. When the HOA switch is in the HAND position, the ___ light is energized. Select one: a. white b. green c. both a and b d. neither a nor b

c

Which of the control devices listed below have maintained contacts? I. A pressure switch II. A conventional thermostat III. A foot switch without latches IV. A hand-off-auto selector switch Select one: a. II only b. III & IV only c. IV only d. I & II only e. none of these

c

Which of the control devices listed below have momentary contacts? I. A pressure switch II. A conventional thermostat III. A foot switch without latches IV. A hand-off-auto selector switch Select one: a. I & III only b. IV only c. I, II & III only d. I & II only e. none of these

c

Which of the following is a manual control device? I. single-pole toggle switch II. NC momentary-contact pushbutton switch III. float switch IV. NO momentary-contact pushbutton switch Select one: a. I, II, III & IV b. III only c. I, II & IV only d. II & IV only e. I only

c

Which of the pushbutton operators below would be best suited for an emergency shutdown of a computer room where the switch is located next to the principal exit door? Select one: a. flush button b. 2-position selector switch c. extended button under a hinged cover d. extended button

c

Figure 323.5 The control circuit neutral (L2) should be connected to point(s) ___ in Figure 323.5. Select one: a. Y b. X & H c. X d. U e. Y & U

e

Refer to Figure 324.45. The current time is 9 pm. When the HOA switch is in the AUTO position, ___ is energized. I. the TC motor II. the white light III. the green light IV. the transformer V. relay R1 Select one: a. I, II & IV only b. I,II, III & IV only c. I & IV only d. I, IV & V only e. all of these

e

** Figure 323.1 Refer to Figure 323.1. With the lever pushed down (to simulate a falling liquid level), an ohmmeter reading between points 3 & 4 should indicate ___ ohms. Select one: a.OL (or ∞) b.0 to 0.2 c.40 to 400

a

323.10. Refer to Figure 323.10. You press and hold the STOP PB switch. Placing your ohmmeter leads between points 1 & 2, you get a reading of OL. Still pressing the STOP PB, you take a reading between points 3 & 4 and get OL ohms. You release the switch and the reading between 1 & 2 returns to .2 ohms while 3 & 4 remains at OL ohms. The STOP PB is connected to ___ on the terminal switch. Select one: a. 1 & 2 b. 3 & 4

a

A mechanical level switch functions properly when the float is immersed in ___. I. dirty water II. water III. paint Select one: a. I or II only b. I, II or III c. II or III only d. I or III only e. I only f. II only

a

Figure 321.14 Refer to Figure 321.14. An ohmmeter reading between Points G & H would indicate ___ Ω. Select one: a. OL (or ∞) b. 0 to 0.2 c. 10 to 400

a

Figure 323.1 Refer to Figure 323.1. With the lever pushed up (to simulate a rising liquid level), an ohmmeter reading between points 1 & 3 should indicate ___ ohms. Select one: a.OL (or ∞) b.40 to 400 c.0 to 0.2

a

Figure 323.1 Refer to Figure 323.11. This switch has ___ set(s) of NO contacts. Select one: a. 1 b. 4 c. 0 d. 2 e. 3

a

Figure 323.13 Refer to Figure 323.13. The leads of a voltmeter were placed on Terminals 2 & 3. If the meter indicates 0 volts, what is the status of the switch. Select one: a. Open b. Closed

a

Figure 323.5 Point H in Figure 323.5 should be connected to the ___. Select one: a. the contactor coil b. the control circuit "hot" (L1) c. lighting load

a

Figure 323.9 Refer to Figure 323.9. You press and hold the PB switch and place your ohmmeter leads between points 1 & 2 on the T-strip. You get a reading of 0.2 ohms but when you release the pushbutton the reading returns to OL (or ∞) ohms. The switch contacts are ___. Select one: a. momentary b. maintained

a

Figure 324.41 Refer to Figure 324.41. A jumper should be connected between terminals ___ on the time clock. Select one: a. 2 & 3 b. 3 & 4 c. 1 & 2 d. jumper not req'd

a

Resistance or continuity measurements are made with the circuit ___. I. de-energized II. energized Select one: a. I only b. II only c. either I or II d. neither I nor I

a

Some single-phase AC manual motor switches can be installed in a standard switch box. Select one: a. True b. False

a

Table 323.100 Refer to the Table 323.100. A NEMA type 1 enclosure, containing a contactor, is permitted to be installed ___. Select one: a. inside a building b. outside a building under a covered canopy c. on the outside of a building d. any of these e. none of these

a

Table 323.100 Refer to the Table 323.100. A NEMA type 3R enclosure contains a motor starter. This starter is permitted to be installed ___. I. on the outside of a building II. outside a building under a covered canopy III. inside a building Select one: a. I, II or III b. I or II only c. II only d. I only e. none of these

a

Table 323.100 Refer to the Table 323.100. NEMA 3R enclosures can be used indoors. Select one: a. True b. False

a

** Figure 323.1 Refer to Figure 323.1. With the lever pushed up (to simulate a rising liquid level), an ohmmeter reading between points 1 & 2 should indicate ___ ohms. Select one: a.OL (or ∞) b.0 to 0.2 c.40 to 400

b

A 3-position foot switch is normally spring loaded to return to the ___ position when the force is removed. Select one: a. ON b. OFF

b

Discharging a tank is also known as ___ control and empties a tank when the liquid reaches a certain level. Select one: a. pump b. sump

b

Figure 323.11 Refer to Figure 323.11. This switch has ___ contacts. Select one: a. maintained b. momentary

b

Figure 323.15 Refer to Figure 323.15. The leads of a voltmeter were placed on Terminals 2 & 3. If the meter indicates 12 volts, what is the status of the switch. Select one: a. Open b. Closed

b

Figure 323.8 Equipment III, shown in Figure 323.8, has ___ set(s) of NC contacts. Select one: a. 0 b. 1 c. 3 d. 2 e. 4

b

A red legend plate is normally used for circuit functions such as ___. Select one: a. emergency stop b. stop c. off d. any of these

d

A(n) ___ consists of a legend plate, an operator, and one or more contact blocks. Select one: a. industrial relay b. control transformer c. motor starter d. industrial pushbutton

d

At a minimum, a START-STOP momentary-contact pushbutton station uses ___. Select one: a. two sets of contacts- both NO b. three sets of contacts- one NO and two NC c. three sets of contacts- one NC and two NO d. two sets of contacts- one NO and one NC

d

Figure 323.13 Refer to Figure 323.13. If the leads of a voltmeter were placed on Terminals 1 & 2, the meter should indicate ___ volts. The switch is closed and each battery has a rating of 12 volts. Select one: a. 6 b. 12 c. 24 d. 0 e. none of these

d

Refer to the Table 110.28 in the NEC. Which of the following enclosure types is a NEMA standard? Select one: a. Type 12 b. Type 6P c. Type 3R d. All of these

d

Selector switches are available with ___ positions. Select one: a. three b. more than 3 c. two d. a, b, or c

d

Table 323.100 Refer to the Table 323.100. A NEMA 3R enclosure is rated to withstand which of the following environmental conditions? Select one: a. windblown dust b. corrosive agents c. occasional temporary submersion d. rain e. all of these

d