FREE AND STUDY GAMES ABOUT MOTOR CONTROL CH 2

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FREE AND STUDY GAMES ABOUT MOTOR CONTROL CH 2

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -19 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: 9. In motor control operations that require quick operator interaction, utilize a _____-type pushbutton switch.

Answer:

mushroom Question 2: 16. How many contacts would be required for a joystick switch used to move a

crane if the crane required the following operations: UP, DOWN,LEFT, and RIGHT?

Answer:

4 Question 3: 23. Which type of audible signaling device has maximum sound output of 108 dB?

Answer:

general purpose horn Question 4: 10. When installing pushbuttons or selector switches, ___ type operators are generally installed in 30.5 mm openings, while ____ type operataors are generally installed in 16 mm or 22.5 mm openings.

Answer:

NEMA IEC page 20

Question 5: 17.Name three types of lamps used in visual signaling devices.

Answer:

incandescent lamp, LED, xenon(strobe) tube

Question 6: The two parts of a pushbutton switch are the ___ and the ___.

Answer:

operator, contact block Question 7: 12. A typical HAND-OFF-AUTO control operation typically requires a ____(how many) position selector switch with ___ (how many) contacts.

Answer:

3 , 2

Question 8: 3. Double break contacts have a ___current rating than single break contacts of the same size.

Answer:

higher Question 9: 22. A ___indicator or ___ light allows multiple indicators and signaling devices to be assembled in a column.

Answer:

tower indicator or stock light

Question 10: 24. What are the two categories of switch failures?

Answer:

operator problems and contact problems Question 11: 21. What type of visual indicating device allows the lamp to be tested by pressing the lens of the indictor?

Answer:

push to test Question 12: 4. A switch contact which changes states when actuated, but returns to its initial state when the actuation is removes, is called a ___ operator.

Answer:

momentary

Question 13: 19. A ___ pilot light allows up to four lamps in a single pilot light.

Answer:

cluster Question 14: 14. The ___ switch is a three-position switch that can be used to manually change the direction of rotation of a three-phase motor.

Answer:

drum switch Question 15: 25. ____ control devices are designed for control of systems where failure free operation of the control system is of primary concern.

Answer:

safety

Question 16: 2. The following diagram illustrates a ___ pole ___ throw switch.

Answer:

double double Question 17: 11. ___-(how many) position selector switches with maintained contacts are the most common type of selector switch.

Answer:

2 Question 18: 20. Which two types of visual indicators are normally associated with a hazard problem or a proceed-with-caution indication?

Answer:

rotating or flashing lights Question 19: 1. Manually-operated pilot devices are actuated by a ____ operator.

Answer:

Human