A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

Machine Design
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

2050 N-m

2000 N-m

2136 N-m

2100 N-m

2050 N-m

2000 N-m

2136 N-m

2100 N-m

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Machine Design
When a metal or alloy is cold worked,

It is worked below recrystallization temperature

None of these

Both (A) and (B)

Its hardness and strength increases

It is worked below recrystallization temperature

None of these

Both (A) and (B)

Its hardness and strength increases

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Machine Design
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

T₁ + T₂ + Tc

(T₁ - T₂ + Tc)/2

(T₁ + T₂ + Tc)/2

T₁ - T₂ + Tc

T₁ + T₂ + Tc

(T₁ - T₂ + Tc)/2

(T₁ + T₂ + Tc)/2

T₁ - T₂ + Tc

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Machine Design
The centrifugal tension in the belt

Decreases the power transmitted

Increases the power transmitted

Has no effect on the power transmitted

Is equal to maximum tension on the belt

Decreases the power transmitted

Increases the power transmitted

Has no effect on the power transmitted

Is equal to maximum tension on the belt

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Machine Design
Whether any core is required in wire ropes

Yes

Sometimes

No

Rarely

Yes

Sometimes

No

Rarely

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Machine Design
Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by

(k₁ - k₂)/ (k₁ k₂)

(k₁ - k₂)/ (k₁ + k₂)

(k₁ k₂)/ (k₁ + k₂)

(k₁ + k₂)/ (k₁ k₂)

(k₁ - k₂)/ (k₁ k₂)

(k₁ - k₂)/ (k₁ + k₂)

(k₁ k₂)/ (k₁ + k₂)

(k₁ + k₂)/ (k₁ k₂)

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Machine Design

Machine Design When a metal or alloy is cold worked,

Machine Design If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

Machine Design The centrifugal tension in the belt

Machine Design Whether any core is required in wire ropes

Machine Design Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by

Machine Design
When a metal or alloy is cold worked,

Machine Design
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

Machine Design
The centrifugal tension in the belt

Machine Design
Whether any core is required in wire ropes

Machine Design
Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by