officerpath@gmail.com Hyderabad, Pakistan
Login Register
Latest Jobs CSS 2025 PMS CCE Sindh FPSC PPSC MCQs Past Papers Current Affairs Scholarships Admissions Downloads Roll No. Slips Results
Electrical Engineering

Heating And Welding MCQs

Practice Heating And Welding MCQs for competitive exams.

Heating And Welding MCQs

Practice questions from this topic.

In direct arc furnace, which of the following has high value?

  1. A. Current
  2. B. Voltage
  3. C. Power factor
  4. D. All of the above
Report Error

Due to which of the following reasons it is desirable to have short arc length?

  1. A. To achieve better heating
  2. B. To increase the life of roof refractory
  3. C. To have better stirring action
  4. D. All of the above
Report Error

For intermittent work which of the following furnaces is suitable?

  1. A. Indirect arc furnace
  2. B. Core less furnace
  3. C. Either of the above
  4. D. None of the above
Report Error

Which of the following will happen if the thickness of refractory wall of furnace is increased?

  1. A. Heat loss through furnace wall will increase
  2. B. Temperature inside the furnace will fall
  3. C. Temperature on the outer surface of furnace walls will drop
  4. D. Energy consumption will increase
Report Error

In a domestic cake baking oven the temperature is controlled by

  1. A. Voltage variation
  2. B. Thermostat
  3. C. Autotransformer
  4. D. Series-parallel operation
Report Error

Which of the following is an advantage of heating by electricity?

  1. A. Quicker operation
  2. B. Higher efficiency
  3. C. Absence of flue gases
  4. D. All of the above
Report Error

In heating the ferromagnetic material by induction heating, heat is produced due to

  1. A. Induced current flow through the charge
  2. B. Hysteresis loss taking place below Curie temperature
  3. C. Due to hysteresis loss as well as eddy current loss taking place in the charge
  4. D. None of the above factors
Report Error

Resistance variation method of temperature control is done by connecting resistance elements in

  1. A. Series
  2. B. Parallel
  3. C. Series-parallel connections
  4. D. All of the above ways
Report Error

In an electric room heat convector the method of heating used is Resistance heating

  1. A. True
  2. B. False
Report Error

It is desirable to operate the arc furnaces at power factor of

  1. A. Zero
  2. B. 0.707 lagging
  3. C. Unity
  4. D. 0.707 leading
Report Error

Which of the following methods is used to control temperature in resistance furnaces?

  1. A. Variation of resistance
  2. B. Variation of voltage
  3. C. Periodical switching on and off of the supply
  4. D. All of the above methods
Report Error

By which of the following methods the temperature inside arcane can be varied?

  1. A. By disconnecting some of the heating elements
  2. B. By varying the operating voltage
  3. C. By varying the current through heating elements
  4. D. By any of the above method
Report Error