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Engineering
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Civil Set-1
Structural Engineering I
98

Structural Engineering I MCQ with Answers

98) The condition for a lifting machine to be reversible is that its efficiency should be

less than 50%

more than 50%

more than 66.67%

equal to 100%

Answer is:

more than 50%

Structural Engineering I MCQ with Answers

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Related Structural Engineering I MCQ with Answers

99) In a lifting machine a weight of 5 kN is lifted through 200 mm by an effort of 0.1 kN moving through 15 m. The mechanical advantage and velocity ratio of the machine are respectively

50 and 75

75 and 50

75 and 75

50 and 50

Answer is:

50 and 75

100) In a lifting machine with efficiency 60%, an effort of 200 N is required to raise a load of 6 kN. The velocity ratio of the machine is

30

50

60

80

Answer is:

50

101) Free body diagram is an

isolated joint with only body forces acting on it

isolated joint with internal forces acting on it

isolated joint with all the forces, internal as well as external, acting on it

none of the above

Answer is:

isolated joint with all the forces, internal as well as external, acting on it

102) A system of coplanar forces acting on a rigid body can be reduced to

one force only

one couple only

one force and one couple only

none of the above

Answer is:

one force and one couple only

Structural Engineering I MCQ with Answers

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