Deck 35: The 555 on Delay Timer

Question 1

A ____ is used to steal the base current from the transistor.

A) stealer transistor
B) vampire transistor
C) bridge transistor
D) leading transistor

Answer 1

A

Question 2

In the accompanying figure, diode D1 is used as a ____ diode.

A) lock-back
B) kick-back
C) choke
D) flow-through

Answer 2

B

Question 3

A 555 timer provides accurate time delays which can range from seconds to hours.

Answer 3

True

Question 4

A 555 timer must supply the current needed to operate a relay.

Question 5

In a 555 timer, pin #____ is the reset pin.

A) 2
B) 3
C) 4
D) 5

Question 6

The delays provided by a 555 timer depend on the values of resistance and ____ used in the circuit.

A) voltage
B) inductance
C) impedance
D) capacitance

Question 7

In the accompanying figure, capacitor ____ is connected from the base of transistor Q1 to the ground.

A) C1
B) C2
C) C3
D) D1

Question 8

In the accompanying figure, resistor R3 limits the base current to transistor Q1.

Question 9

In the accompanying figure, transistor Q1 is used as a stealer transistor to steal the base current from  transistor Q2.

Question 10

A 555 timer can be used to construct an on-delay relay.