Robotics 10_2nd Quarter_Pretest

1.     Which of the switches that aims at closing and opening the circuits electronically as well as electromechanical?

                                                          

                                        

• a.   relay         

• b.   push button     

•   c. toggle

•              d. float

2. What is the use of relays in control panels, manufacturing and building automation?

• a.   to control the power from switching “ON” and “OFF” input voltage.

• b.   to control the power from switching high voltage to low voltage.

• c.  to control the power along with switching the low current to higher current values.

• d.   to control the flow of current manually and switch electronically.

3.   Which of the relays that has no polarities and it executes no change with the alteration of the input signal?

• a.   polarized relay

• b.   bipolarized relay 

• c. non-polarized relay

                                    

• d. non-conductive relay

4. 4.     Refers to the name given for the combination of solid-state and electromechanical relays.

• a.   electromechanical

• b.   hybrid     

• c. thermal

• d. solid state

5. What is the effect of the magnetic fields on the relay control coil when energy is supplied?

• a. intensify

• b. no effect

• c. drop

• d. blocks the current

Refers to a specialized type of clock which is used to measure time intervals.

• a. counter

• b. memory

• c. processor

• d. timer

Refers to a device that stores (and sometimes displays) the number of times a particular event or process occurred, with respect to a clock signal.

• a. memory

• b. timer

• c. counter

• d. processor

Timers were constructed in the past as an add-on device to relays. What is the function of a timer in closing and opening a plunger?

• a.   Slow down the transition of the plunger

• B.   Prevent the plunger from opening and closing.

• c.   Keep the plunger open and close.

• d. Make the opening and closing of plunger faster.

10. What is the frequency of the clock (crystal oscillator) in Arduino Uno board?

• a.   10Mhz

• b.   20Mhz        

• c. 16Mhz

• d. 32Mhz