Deck 4: Measurements and Precision Measuring Devices Precision Measurements

Question 1

What is true about measuring shaft diameter and wear?

A)If a shop does not overhaul motors, measurements are not made.
B)Measurements only need to be made in one location.
C)Noise does not accurately determine wear.
D)Micrometers only come in metric.

Answer 1

C

Question 2

Two technicians are discussing measuring bearing journals. Technician A says that measurements should be made on a machined area. Technician B says that unmachined areas are typically measured. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Answer 2

A

Question 3

You should still measure severely damaged journals before replacing the part.

Answer 3

False

Question 4

Two technicians are discussing journal measurements. Technician A says that two measurements are not necessary. Technician B says an out-of-round journal will not affect bearing life. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 5

Two technicians are discussing bore measurements. Technician A says that bores can be measured at the top with an outside micrometer. Technician B says that bores must be measured from the inside with a telescoping gauge. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 6

Two technicians are discussing measuring bores with inside micrometers. Technician A says that extension spindles allow the measurement of cylinder bores. Technician B says that once the micrometer is inserted into the bore and extended, it should be tightened and removed. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 7

Speed sensors use a toothed ring to trigger the sensor.

Question 8

Outside micrometers are used to measure journals or shafts to check for out-of-round.

Question 9

A bore measurement must be made with what two tools?

A)An inside micrometer and a ruler
B)Calipers and an outside micrometer
C)An outside micrometer and a telescoping gauge
D)A ruler and a telescoping gauge

Question 10

Spark plug gaps are measured with a round feeler gauge

Question 11

Use a dial indicator to measure shaft endplay.

Question 12

Runout is a term used to determine if there is a wobble in a wheel or disc.

Question 13

Two technicians are discussing spark plug gaps. Technician A says that it is critical that spark plug gap be set. Technician B says that a round wire feeler gauge is used to measure gap. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 14

Technician A and technician B are discussing spark plug gap. Technician A says that the spark may be weak in strength if the gap is too wide. Technician B says that the spark will have high-voltage if the gap is too narrow. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 15

Thrust wear can contribute to out-of-round cylinders.

Question 16

Two technicians are discussing runout. Technician A says that runout won't affect vehicle operation. Technician B says that runout can cause severe vibration. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 17

Two technicians are discussing air gap measurements. Technician A says that non-magnetic feeler gauges should never be used. Technician B says that measurements should be made with a tooth of the ring aligned with the center of the sensor. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 18

When measuring engine vacuum, a vacuum gauge is connected to a port that is directly tapped into the intake manifold

Question 19

Pressure gauges always read less than 10 lbs per square inch.

Question 20

Tire pressures should be checked when the tires have been warmed up.

Question 21

What can vacuum readings from an operating engine tell us?

Question 22

What tool is used to measure shaft endplay?

Question 23

What statement is true concerning engine vacuum?

A)Engine vacuum is not related to engine problems.
B)The vacuum gauge must be connected to a fitting in the intake manifold.
C)A rise in vacuum is a sign of a properly operating engine.
D)Average reading for a properly running engine is approximately 25-30 in. Hg.

Question 24

What will thrust wear cause in a cylinder bore?

Question 25

Name two different types of micrometers.

Question 26

What tool is used to measure spark plug gap?

Question 27

What tool is used to measure the thickness of a brake rotor?

Question 28

What tool is used to measure runout on a brake rotor?

Question 29

Describe how to measure spark plug gap.

Question 30

What device is added to an inside micrometer when measuring a cylinder with a diameter larger than one inch?

Question 31

Two technicians are discussing brake rotor thickness. Technician A says that rotors must be removed to measure thickness. Technician B says that rotors can be measured on or off the vehicle. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 32

What are two things that should be considered when observing measurements from a cylinder bore?

Question 33

Runout is measured with a(n)_____.

A)dial indicator
B)inside micrometer
C)caliper
D)outside micrometer

Question 34

What is the purpose of pressure measurements on antilock brake systems?

Question 35

What component is used to trigger sensors in a wheel speed sensor?

Question 36

What two types of dial indicators can be used to measure rotor runout?

Question 37

Where is the minimum thickness specification for a brake disc located for a specific vehicle?

Question 38

How do you measure a cylinder bore with a telescoping gauge?

Question 39

Two technicians are discussing engine vacuum readings. Technician A says that a fluctuating vacuum gauge is a sign of a vacuum leak. Technician B says that a fluctuating vacuum gauge is a sign of possible engine problems. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 40

Two technicians are discussing measuring pressure in an automobile. Technician A says that fuel, oil, automatic transmission, and brake pressure can be measured. Technician B says that the pressure gauge must read in hundreds of pounds of pressure. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B