Take A Free ASNT NDT LPT Level 3 Practice Test – Quiz Course

1.

Introduction

In the system concept, a system consists of:

2.

The classification term method refers to the method of:

3.

The classification term typically refers to the type of:

4.

The superseded classification of groups includes which of the following?

5.

Liquid penetrant testing is defined as:

6.

Materials and Properties

Rapid evaporation of a penetrant can affect the viscosity as well as the economic and safety aspects of a penetrant. The rate of evaporation is controlled by:

7.

A penetrant must be lighter than water so that water contamination will always sink to the bottom of the tank. This property is related to the:

8.

The property that controls the rate of penetration is the:

9.

Fluorescent dyes used in penetrants absorb photon energy at a wavelength of 365 nm. The approximate wavelength of the color that most fluorescent penetrants emit is:

10.

A visible dye penetrant is not as sensitive as most fluorescent dye penetrants because:

11.

Mechanism of Penetration, Emulsification, and Development

The contact angle is measured at the air-liquid surface interface on a solid material.
Which of the following is true?

12.

Flaw entrapment efficiency is a term that describes the ability of a penetrant to enter a discontinuity and form a visible indication. Properties that influence the discontinuity entrapment efficiency include:

13.

Capillary action is fastest in a:

14.

What is the highest contact angle that a penetrant can have and still penetrate spontaneously?

15.

Two basic properties of a liquid that control its penetrating capability are:

16.

Basic Penetrant Processing

To provide safety for manual spray gun operators, electrostatic spraying requires that penetrant materials have what level of electrical resistance?

17.

The water wash test is used to evaluate the washing properties of penetrants and emulsifiers. The spray nozzle is held 30 cm (12 in.) from the wash surface. The water pressure must not exceed:

18.

One advantage of having a little background fluorescence is that it:

19.

The most sensitive application technique for dry developers is:

20.

The size of a penetrant indication depends on:

21.

Inspection, Interpretation, and Evaluation

Light is made up of rays of various colors and wavelengths. Which of the following units of wavelength has the shortest increment?

22.

The ultraviolet light intensity necessary for the detection of very fine indications is:

23.

The filter used in front of the high-pressure mercury vapor light has a peak transmission at a wavelength of:

24.

For best results when testing for critical discontinuities, visible penetrants should be illuminated with the white light of what intensity?

25.

The wash station for fluorescent penetrants should be illuminated by:

26.

Test Equipment

Which of the following should have the least consideration when determining whether the equipment should be stock modular units or a specially designed automated penetrant processor?

27.

Which of the following is not considered when evaluating fluorescent penetrant equipment for a specific facility?

28.

For dip tank applications, the developer that requires the least maintenance and quality testing is:

29.

When fluorescent penetrant is used without developer, the ultraviolet light intensity recommended at the test surface is:

30.

The human eye does not respond the same to all colors in the visible light range. If all have the same intensity, the color that is easiest to detect is:

31.

Selection of the Liquid Penetrant Testing Method

Stress corrosion cracks are very fine and often contain corrosion products. Penetrant dwell times of 4 h are often required. What technique should be used?

32.

The quality level of a penetrant test will not be affected by:

33.

A welded aluminum part from the welding department is to be penetrant tested by nondestructive testing personnel before being sent to the paint department for cleaning, anodizing, and painting. The most time-efficient and cost-efficient process is to:

34.

Austenitic stainless steel, nickel-based alloys, and titanium (at elevated temperatures) are subject to stress corrosion. Penetrant materials used to test these materials for stress corrosion must have:

35.

One reason for management to select penetrant testing is:

36.

Process Control

Penetrants in aerosol containers are most affected by:

37.

Deterioration of new penetrant during storage is largely caused by:

38.

A reference sample at a facility with a working penetrant line is a:

39.

The frequency of process controls is determined by:

40.

Process control of penetrant testing is mainly concerned with:

41.

Safety, Health, and Disposal

The wavelength at which ultraviolet light is hazardous to humans is:

42.

A health hazard that results from the concentrated exposure to the fumes and vapors from penetrants and associated materials is:

43.

Caution must be used when applying some nonaqueous type developers because of:

44.

The minimum µash point for penetrant in open tanks as established by OSHA regulations is:

45.

The µash point of a liquid is the:

46.

Test Procedure

A subcontractor for a manufacturer would normally perform penetrant tests to:

47.

What is a common industrial technique for implementing a penetrant test requirement?

48.

Appendix 1 Review Questions

Allowable penetrant materials are restricted to those in:

49.

When are in-service quality tests on penetrant materials in open tanks required?

50.

In order to enhance the sensitivity of the process, which of the following may be done before application of the penetrant?

51.

For penetrant testing, the process specification establishes:

52.

Which reference document covers the calibration of equipment?