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4th TSSA Part A Unit 1 Exam Questions and Answers.
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4th TSSA Part A Unit 1Exam Questions and
Answers
(4-009-2.3) The ability of a body to do work due to its motion is called ____________
energy. - Answer-Kinetic
(4-009-1.7) The change of position (in meters) per unit time is: - Answer-Velocity
(4-015-1.5) The force of friction is: - Answer-Not affected by the area of the two surfaces
in contact.
(4-012-1.11) With reference to scalars and vectors, a space diagram: - Answer-
Illustrates a system of vectors.
(4-016-3.3) A 1.5m long round bar is 45mm diameter and stretches 1.2mm under a load
of 240kN. Calculate the strain in the bar. - Answer-0.0008
(4-015-2.7) Find the force required to move a 25kg block along a horizontal floor if the
coefficient of sliding friction is 0.19. - Answer-46.6 N
(4-013-1.1) Velocity is a/an ___________ quantity. - Answer-Vector
(4-010-2.8) A 5m long bar is pivoted on the right end and a force of 10N is applied
upwards on the left end. The moment of force is: - Answer-50Nm clockwise
(4-016-2.8) External tensile forces acting parallel but not in line produce _________ in
an object. - Answer-Shear stress
(4-017-2.2) A 28-tooth gear turns at 100 rpm and drives a 112-tooth gear. What is the
speed of the follower gear? - Answer-25 rpm
(4-009-2.8) The ability of a body to do work by virtue of its position is the body's
___________ energy. - Answer-Potential
, (4-017-1.2) The tensions in the tight and slack sides of a belt drive are 14000N and
900N respectively. If the power transmitted is 655kW, what is the speed of the belt, if
there is no slippage? - Answer-50 m/s
(4-009-1.4) The mass of an object may be measured in: - Answer-kg
(4-016-2.7) The _______ is the maximum stress value that a material can be subjected
to and still return to its original size and shape when the deforming load is removed. -
Answer-Elastic limit
(4-016-2.4) The ratio between the ultimate strength and the allowable stress is called
the: - Answer-Safety factor
(4-013-3.5) An object is dropped from a height of 45m. What will be its velocity
immediately before it hits the ground? - Answer-29.71 m/s
(4-013-2.3) An airplane travels 500km due west in 2 hours. Its average velocity was: -
Answer-69.4 m/s due west
(4-012-1.8) Which of the following is NOT a scalar quantity? - Answer-Velocity
(4-017-1.5) In a belt drive system, the input to the driver pulley is 265kW and the output
is 211kW. What is the efficiency? - Answer-79.60%
(4-017-1.6) In a belt drive system, if the driver is smaller than the follower the: - Answer-
Follower will turn slower than the driver.
(4-016-int.1) _____________ is the internal resistance to an applied external force. -
Answer-Stress
(4-012-1.2) Determine the magnitude and direction of resultant of the following
concurrent coplanar forces - 10N at 32° east of north, 35N at 50° east of north, 25N at
72° east of north, and 85N at 40° east of south - Answer-114N at 77° east of south
(4-010-2.6) A lever is 3m long and is pivoted at one end. A load of 8000N is suspended
from the lever at a point 1m from the pivot. What force must be applied at the other end
of the lever to obtain equilibrium? - Answer-2666.667 N
(4-009-1.2) What is the power required to apply a 200kN force over a distance of 15m in
15 seconds? - Answer-200 kW
(4-016-1.2) The ability of a material to resist penetration is called: - Answer-Hardness
(4-011-1.3) A wheel and axle has a mechanical advantage of 10. Calculate the diameter
of the axle if the diameter of the wheel is 30cm. - Answer-3 cm
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