Top 150+ Solved Manufacturing Technology 1 MCQ Questions Answer
Q. What is the minimum power supply needed for the working of spot welding process?
a. 10 kva
b. 14 kva
c. 6 kva
d. 22 kva
Q. Which of the following defects occur at a lower temperature?
a. undercut
b. hot cracking
c. cracking in weld metal
d. cold cracking
Q. Which of the following is the main advantage of using the electromagnetic forming process?
a. high speed
b. low maintenance
c. applicable to all materials
d. no spring-back
Q. What is the maximum pressure required in a compression molding process?
a. 35 mpa
b. 40 mpa
c. 45 mpa
d. 50 mpa
Q. In compression molding, the curing time does not depend on which of the following factors?
a. material
b. curing temperature
c. geometry
d. thickness
Q. What is the maximum curing time required in a compression molding process?
a. 2 minutes
b. 3 minutes
c. 4 minutes
d. 5 minutes
Q. What is the minimum pressure required in a transfer molding process?
a. 20 mpa
b. 40 mpa
c. 50 mpa
d. 70 mpa
Q. A three phase induction motor is sometimes called a generalized transformer in so far as voltage and frequency transformation has been concerned. How a three phase induction motor operates when rotor frequency is greater than stator frequency?
a. rotor will be driven against rmf
b. rotor will be driven in direction of rmf
c. no emf will be induced
d. the losses will be maximum
Q. A three phase induction motor is sometimes called a generalized transformer in so far as voltage and frequency transformation has been concerned. How a three phase induction motor operates when rotor frequency is less than stator frequency?
a. it operates as induction motor
b. emf is induced in rotor
c. rmf will rotate at synchronous speed
d. all of the mentioned
Q. Consider a situation in which a welding operation is being performed with V = 20 volts, I = 200 A, and the cross-sectional area of the weld bead is 30 mm2. Estimate the welding speed if the workpiece and electrode are made of (a) aluminum, (b) carbon steel, and (c) titanium. Use an efficiency of 75%.
a. 35 mm/s
b. 34.5 mm/s
c. 36 mm/s
d. 46 mm/s
Q. In arc welding, arc is created between the electrode and work by?
a. contact resistance
b. flow of voltage
c. flow of current
d. electrical energy