MD 7 Elevators Pt.3

It is the opposite of clearance. This is use for mating cylindrical parts in which the internal member is larger than the external member.

• interference

• allowance

• tolerance

• variation

The algebraic difference between a size and the corresponding basic size.

• tolerance

• allowance

• clearance

• deviation

The algebraic difference between the maximum limit of size and the corresponding basic size.

• upper deviation

• lower deviation

• fundamental deviation

• tolerance

The minimum stated clearance or maximum stated interference for the mating parts.

• variation

• limit

• allowance

• limits

What dimensional property of a material refers to a wavelike variation from a perfect surface, generally much wider in spacing and higher in amplitude than surface roughness?

• lay

• waviness

• surface finish

• out of flat

Which of the following that wire ropes are mostly applied?

• high speeds and low speed tension

• high speeds and high tension

• low speeds and low tension

• low speeds and high tension

The specification of wire ropes includes two numbers, such as 6 X 7. The first number indicates _____.

• the number of strands in the wire rope

• the number of wires inside the rope

• the number of twisted steel wire

• the number of cores inside the wire rope

The failure of wire rope is mainly due to _____.

• fatigue or wear while passing around the sheave

• load gradually applied on the rope.

• intermittent loading on the rope.

• tensile stress due to the applied load.

The wires on the rope are subjected to which stress?

• shear stress

• tensile stress

• tensile and bending stress

• bearing stress

Which of the following is also known as standard hoisting rope?

• 6 X 19

• 6 X 17

• 6 X 37

• 6 X 7