Heating and Welding - Interview Questions | Exam2Win

Take a timed mock test specifically for Heating and Welding.

1. Which of the following methods of heating is not dependent on the frequency of supply ?

A. Induction heating

B. Dielectric heating

C. Electric resistance heating

D. All of the above

Explanation:

2. A perfect black body is one that

A. transmits all incident radiations

B. absorbs all incident radiations

C. reflects all incident radiations

D. absorbs, reflects and transmits all incident radiations

Explanation:

3. Heat transfer by condition will not occur when

A. bodies are kept in vacuum

B. bodies are immersed in water

C. bodies are exposed to thermal radiations

D. temperatures of the two bodies are identical

Explanation:

4. A non-dimensional number generally associated with natural convection heat transfer is

A. Prandtl number

B. Grashoff number

C. Pecelet number

D. Nusselt number

Explanation:

5. By the use of which of the following, high frequency power supply for induction furnaces can be obtained ?

A. Coreless transformers

B. Current transformers

C. Motor-generator set

D. Multi-phase transformer

Explanation:

« Prev 1 2 3 4 5 6 7 8 9 Next »