testt

A steel specimen (10 in. diameter) is subjected to a tensile lorce F of 400 kips. Ii'the poison ratio is 0.29, and the modulus of elasticity E, is 2.8 x 107 psi, find the dilatation

• 6.5 x 105 in

• 7.65 x 104 in

• 7.65 x 105 in

• 65 in

A copper column of annular cross section has an outer diameter de of 15 it and is subjected to a force of 45 kips. the allowable compressive stress is 300 Ib/ft. What should be the wail thickness?

• 3

• 4.59

• 3.52

• 5.03

A pair where the elements do not enclose each
other and the members are either in point or line
contact.

• Higher Pair

• Inversion

• Lower Pair

• Elements

Which of the following does not have to be

lubricated when drilling?

• steel

• monel

• brass

• tool steel

Torsional deffection is a significant consideration in the design of shaft and the limit should be in the range of how many degree/foot of length?

• 0.4 to 1

• 0.08 to 1

• 0.1 to 1

• 0.6 to 1

The permissible variation in the size of a dimension; the différence between tne limits of size.

• allowance

• clearance

• variance

• tolerance

What power is needed to lift a load of 4.5 kips by means of a cable wrapped around the drum of a hoist, the drum being 40 inches in diameter and making 20 rpm?

• 21.31 KW

• 28.56

• 34.5 Hp

• 29.6 Hp

A simple disc clutch has elements with outside and inside radil of 25 cm and 10 cm respectively. The axial force is 1.5 kN. If the coefficient of friction is 0.3, find the torque capacity based on uniform wear

• 79 N-m

• 70 N-m

• 72 N-m

• 86.2 N-m

The deformation that results from a stress and expressed in terms of the amount of deformation per inch

• elangation

• strain

• Poisson’s ratio

• elasticity

the valve push rod for an overhead valve engine is considered a column with round ends. Calculate the critical load if the diameter of the steel rod is 6.35 mm and its length is 355.6 mm? Note, Esteel = 200 GPa

• 1.2 kN

• 29 kN

• 2.3 kN

• 92 kN