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KPCL JE Mechanical 2018
85

KPCL JE Mechanical Question Paper - 2018 with Answer Key

85) Which of the following is the correct type of threads used in lead screw having half nut in lathe which is free to rotate in both directions?

ACME threads

Buttress threads

Whitworth threads

V- Threads

Answer is:

ACME threads

Explanation:

Acme threads are used in lathe lead screws. This form of thread enables the easy engagement of the half nut. The metric acme thread has an included angle of 30°.

Which of the following is the correct type of threads used in lead screw having half nut in lathe which is free to rotate in both directions?

KPCL JE Mechanical Question Paper - 2018 with Answer Key

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86) If D1 and D2 be the diameters of driver and driven pulleys, then belt speed is proportional to

D1/D2

D2/D1

D1-D2

Answer is:

D1

87) Euler's formula holds well only for

Short columns

Long columns

Both short and long columns

Weak columns

Answer is:

Long columns

88) The simply supported beam 'A' of length l carries a central point load W. Another beam 'B' is loaded with a uniformly distributed load such that the total load on the beam is W. The ratio of maximum deflections between beams A and B is

(5/8)

(8/5)

(5/4)

(4/5)

Answer is:

(8/5)

89) Bending stress is

Neither tensile nor compressive stress

Tensile or compressive but cannot be added algebraically with direct tensile stress

Tensile or compressive and can also be added algebraically with direct tensile stress

None of the above

Answer is:

Tensile or compressive and can also be added algebraically with direct tensile stress

KPCL JE Mechanical Question Paper - 2018 with Answer Key

For more MCQ's Click Here

85) Which of the following is the correct type of threads used in lead screw having half nut in lathe which is free to rotate in both directions?

ACME threads

KPCL JE Mechanical Question Paper - 2018 with Answer Key

Related KPCL JE Mechanical Question Paper - 2018 with Answer Key

86) If D1 and D2 be the diameters of driver and driven pulleys, then belt speed is proportional to

D1

87) Euler's formula holds well only for

Long columns

88) The simply supported beam 'A' of length l carries a central point load W. Another beam 'B' is loaded with a uniformly distributed load such that the total load on the beam is W. The ratio of maximum deflections between beams A and B is

(8/5)

89) Bending stress is

Tensile or compressive and can also be added algebraically with direct tensile stress

KPCL JE Mechanical Question Paper - 2018 with Answer Key