TESTING OF MATERIALS 2

What is general dwell time?

• a) 20 seconds

• b) 2 minutes

• c) 20 minutes

• d) 2 hours

Small components are dipped in penetrant.

• a) True

• b) False

Radiography don’t give ________

• a) Thickness of material

• b) Hardness

• c) Blow holes in casting

• d) Pores in weldment

The total resistance of the coil of ECI is known as __________

• a) Impedance

• b) Inductance

• c) Reactance

• d) Capacitance

What is the disadvantage of wet analysis?

• a) Inaccuracy

• b) Time-consuming

• c) Not suitable for iron-carbon alloys

• d) Causes fatigue

Which spectrometer allows analysis of carbon and sulfur?

• a) Vacuum spectrometer

• b) Airpath spectrometer

• c) Tube spectrometer

• d) Rayleigh spectrometer

A ___________ is used to measure the blackness of lines in a spectrograph.

• a) X-ray tube

• b) Manometer

• c) Quantometer

• d) Densitometer

Visual inspection may be done for which of the following activities?

• a) Internal shrinkage

• b) Blowholes

• c) Porosity

• d) Counterbalance weights

How can porosity of material be inspected?

• a) Hammer test

• b) X-ray radiography

• c) Gamma-ray radiography

• d) Liquid penetrant test

What is used as the source of rays for radiography?

• a) Uranium-235

• b) Tellurium

• c) Cobalt-60

• d) Manganese dioxide