Take A Free ASNT NDT IR Level 1 Exam Practice Test – Quiz Course

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Here you can take the free ASNT NDT IR Level 1 Exam Practice Test with the latest Thermal and Infrared Testing Method Questions and Answers

1.

One calorie is equivalent to how much heat energy?

 
 
 
 

3.

Newton’s Law of convective cooling states that:

 
 
 
 

4.

The second law of thermodynamics states:

 
 
 
 

5.

The first law of thermodynamics states:

 
 
 
 

6.

Which of the following temperature scales is considered an absolute scale?

 
 
 
 

7.

Which of the following temperature scales is considered to be a relative scale?

 
 
 
 

8.

For every degree on the Celsius temperature scale, how many degrees are on the Fahrenheit scale?

 
 
 
 

9.

The material property that relates to the rate at that heat flows through a solid material is called:

 
 
 
 

10.

A micron is a unit of:

 
 
 
 

11.

A micron is a unit of measure that is:

 
 
 
 

12.

Which material below is transmissive to long wave (8-14 μm) infrared radiation?

 
 
 
 

13.

You are inspecting an energized 440 V electrical three-phase fused disconnect. The fuse caps on the fuses are copper and appear cooler than the fuse cardboard bodies. What is probably the reason?

 
 
 
 

14.

Emittance of a surface may vary with which of the following?

 
 
 
 

15.

A low sloped roof is inspected in the early evening after a sunny day. Wet absorbent roof insulation appears warmer than dry insulation because:

 
 
 
 

16.

Which of the following equations is used to calculate the amount of radiant energy emitted from a surface?

 
 
 
 

17.

Which of the following IR camera settings may affect a radiometric temperature measurement?

 
 
 
 

18.

Which of the following camera parameters is not adjustable in post-processing computer software?

 
 
 
 

19.

A thick ceramic coffee mug has an emissivity of 0.84 in the 8-14 μm wave band. What is its reflectivity?

 
 
 
 

20.

The temperature of an aluminum bus bar is being measured. You have determined emissivity is 0.15. What is the reflectivity of the bus bar?

 
 
 
 

21.

A perfect thermal mirror would have an emittance equal to:

 
 
 
 

22.

Thermal infrared radiation occurs at wavelengths:

 
 
 
 

23.

An opaque graybody surface with an emissivity of 0.04 would be:

 
 
 
 

24.

The radiant energy emitted by an object is a function of what power of its absolute temperature?

 
 
 
 

25.

What are the three modes of heat transfer?

 
 
 
 

26.

A quick and simple technique for improving the emissivity of highly reflective surfaces is to:

 
 
 
 

27.

What can we say for certain about a clear piece of thin plastic?

 
 
 
 

28.

A large variance of the viewing angle from the normal (90°) to a non-metallic the emitted surface of interest energy sensed.

 
 
 
 

29.

In an infrared roof moisture survey, what effects cause the areas of a roof over wet insulation to be warmer at night than those over dry insulation?

 
 
 
 

30.

Which of the following is not a typical pattern of an anomalous thermal image associated with wet roof insulation?

 
 
 
 

31.

What does IFOV stand for?

 
 
 
 

32.

At what temperature does the emittance of thermal radiation begin?

 
 
 
 

33.

Why do a block of wood and a piece of steel at the same temperature feel so different when they come into contact with your body?

 
 
 
 

34.

During the summer with clear sunny days, clear nights, and a diurnal temperature swing from 32 °C (90 °F) to 10 °C (50 °F), a lake and the surrounding land would probably have the following thermal relationship:

 
 
 
 

35.

The ratio of the radiant emittance of a given body to that of a blackbody is defined as:

 
 
 
 

36.

Which of the following has the lowest thermal conductivity?

 
 
 
 

37.

Which of the following camera adjustments is used to optimize the thermal contrast of a thermal image?

 
 
 
 

38.

Which of the following camera adjustments will have an effect on temperature measurement?

 
 
 
 

39.

Which of the following is a commonly used technique to increase contrast in thermal images?

 
 
 
 

40.

Periodically most focal plane array thermal imagers pause the live image and go through an internal routine called what?

 
 
 
 

41.

An appropriate thermal span and level setting for imaging a human face in a 22 °C (72 °F) room are:

 
 
 
 

Question 1 of 41

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