Top 150+ Solved Manufacturing Technology 1 MCQ Questions Answer
Q. Which of the type of centrifugal casting methods is used to produce ‘non- symmetrical’ shaped castings?
a. true centrifugal casting
b. semi centrifugal casting
c. centrifuging
d. non centrifugal casting
Q. True centrifugal casting method is usually used to make
a. bent pipes
b. hollow pipes
c. bolts
d. nuts
Q. Which of the following forces provides continuous pressure on the metal in centrifugal casting?
a. spring force
b. centrifugal force
c. gravitational force
d. frictional force
Q. Which of the following methods of casting is best suited for casting of hollow pipes and tubes?
a. investment casting
b. permanent mould casting
c. die casting
d. centrifugal casting
Q. The direction of rmf when a single phase supply is given to stator of three phase induction motor is?
a. zero
b. ns
c. 2ns
d. -ns
Q. The direction of rmf when a three phase supply is given to stator of three phase induction motor is?
a. zero
b. ns
c. 2ns
d. -ns
Q. Two three phase induction motors A and B are identical in all respects except that motor A has a larger air-gap than motor B. Which motor will have more no load current?
a. a
b. b
c. both a and b
d. neither a nor b
Q. Two three phase induction motors A and B are identical in all respects except that motor A has a larger air-gap than motor B. Which motor will have poorer power factor?
a. a
b. b
c. both a and b
d. neither a nor b
Q. A three phase induction motor is sometimes calles 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 equal to stator frequency?
a. it will not operate
b. it will operate as induction motor only
c. it will operate as induction generator
d. it will operate in braking mode
Q. The starting method for a 3-phase squirrel-cage induction motor which is inferior in view of poor starting torque per ampere of line current drawn is?
a. series-inductor method of starting
b. direct-on-line starting
c. auto-transformer method
d. star-delta method