Industrial Drivers — Part 1 MCQs with Explanations

Ball or roller is the correct answer to “Rotor of a motor is usually supported on _________ bearings.”. This question is standard in competitive examination syllabi for Industrial Drivers.

100 kW is the correct answer to “When the load is above _________ a synchronous motor is found to be more economical.”. This question is standard in competitive examination syllabi for Industrial Drivers.

Any of the above is the correct answer to “For derris and winches which of the following drives can be used”. This question is standard in competitive examination syllabi for Industrial Drivers.

D.C. series motor is the correct answer to “Which of the following motors is preferred for traction work”. This question is standard in competitive examination syllabi for Industrial Drivers.

Jaw crushers is the correct answer to “Belted slip ring induction motor is almost invariably used for”. This question is standard in competitive examination syllabi for Industrial Drivers.

Speed control is the correct answer to “Which feature, while selecting a motor for centrifugal pump, will be of least significance”. This question is standard in competitive examination syllabi for Industrial Drivers.

Braking is the correct answer to “While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance”. This question is standard in competitive examination syllabi for Industrial Drivers.

D.C. motor is the correct answer to “Which of the following motors is preferred when quick speed reversal is the main consideration”. This question is standard in competitive examination syllabi for Industrial Drivers.

D.C. shunt motor is the correct answer to “For blowers which of the following motor is preferred”. This question is standard in competitive examination syllabi for Industrial Drivers.

Lifts and hoists is the correct answer to “________ need frequent starting and stopping of electric motors,”. This question is standard in competitive examination syllabi for Industrial Drivers.

Intermittent and variable load is the correct answer to “The load cycle for a motor driving a power press will be”. This question is standard in competitive examination syllabi for Industrial Drivers.

Induction motor is the correct answer to “Which of the following motors is used for elevators”. This question is standard in competitive examination syllabi for Industrial Drivers.

Heavy duty is the correct answer to “Ward-Leonard controlled D.C. drives are generally used for _________ excavators.”. This question is standard in competitive examination syllabi for Industrial Drivers.

Is compact is the correct answer to “A reluctance motor”. This question is standard in competitive examination syllabi for Industrial Drivers.

Short time rated motors is the correct answer to “Which of the following motors are preferred for overhead traveling cranes”. This question is standard in competitive examination syllabi for Industrial Drivers.

Heavy is the correct answer to “In jaw crushers a motor has to often start against ________ load.”. This question is standard in competitive examination syllabi for Industrial Drivers.

Variable speed drive is the correct answer to “For which of the following applications D.C. motors are still preferred”. This question is standard in competitive examination syllabi for Industrial Drivers.

Bush is the correct answer to “Is not a part of ball bearing”. This question is standard in competitive examination syllabi for Industrial Drivers.

All of the above is the correct answer to “The characteristics of drive for crane hoisting and lowering are which of the following”. This question is standard in competitive examination syllabi for Industrial Drivers.

Speed is the correct answer to “The starting torque of a D.C. motor is independent of which of the following”. This question is standard in competitive examination syllabi for Industrial Drivers.

All of the above is the correct answer to “Light duty cranes are used in which of the following”. This question is standard in competitive examination syllabi for Industrial Drivers.

Horse power and r.p.m. is the correct answer to “The diameter of the rotor shaft for an electric motor depends on which of the following”. This question is standard in competitive examination syllabi for Industrial Drivers.

Slip ring induction motor is the correct answer to “In case of __________ speed control by injecting e.m.f. in the rotor circuit is possible,”. This question is standard in competitive examination syllabi for Industrial Drivers.

D.C. motor is the correct answer to “Which of the following motors is preferred when smooth and precise speed control over a wide range is desired”. This question is standard in competitive examination syllabi for Industrial Drivers.

All of the above is the correct answer to “The selection of an electric motor for any application depends on which of the following factors”. This question is standard in competitive examination syllabi for Industrial Drivers.

Any of the above is the correct answer to “By the use of which of the following D.C. can be obtained from AC.”. This question is standard in competitive examination syllabi for Industrial Drivers.

Starter is the correct answer to “Which of the following is essentially needed while selecting a motor”. This question is standard in competitive examination syllabi for Industrial Drivers.

True is the correct answer to “Short time rated motors are preferred for overhead traveling cranes”. This question is standard in competitive examination syllabi for Industrial Drivers.

Self starting type synchronous motor is the correct answer to “Reluctance motor is a”. This question is standard in competitive examination syllabi for Industrial Drivers.

Totally enclosed fan cooled is the correct answer to “Which of the following types of motor enclosure is safest”. This question is standard in competitive examination syllabi for Industrial Drivers.

A.C. slip ring motor is the correct answer to “Which of the following motors is preferred for boom hoist of a traveling crane”. This question is standard in competitive examination syllabi for Industrial Drivers.

1 to 2.5 m/s is the correct answer to “The traveling speed of cranes varies from”. This question is standard in competitive examination syllabi for Industrial Drivers.

Explosive atmospheres is the correct answer to “Flame proof motors are used in”. This question is standard in competitive examination syllabi for Industrial Drivers.

Punching machine is the correct answer to “Which of the following machines has heavy fluctuation of load”. This question is standard in competitive examination syllabi for Industrial Drivers.

Any of the above is the correct answer to “In series motor which of the following methods can be used for changing the flux per pole”. This question is standard in competitive examination syllabi for Industrial Drivers.

D.C. shunt motor is the correct answer to “Has relatively wider range of speed control.”. This question is standard in competitive examination syllabi for Industrial Drivers.

Synchronous motor is the correct answer to “________ has least range of speed control.”. This question is standard in competitive examination syllabi for Industrial Drivers.

All of the above is the correct answer to “In which of the following applications the load on motor changes in cyclic order”. This question is standard in competitive examination syllabi for Industrial Drivers.

Lifts and hoists is the correct answer to “For which of the following applications motor has to start with high acceleration”. This question is standard in competitive examination syllabi for Industrial Drivers.

Synchronous motor is the correct answer to “A pony motor is used for the starting which of the following motors”. This question is standard in competitive examination syllabi for Industrial Drivers.