ABSA Practice 4A – 1 questions with verified answers
( 4-081-1.20) The yoke that supports the main components of the DC
machine is frequently made of:
Select one:
a. Aluminum
b. Steel or iron
c. Copper or brass
d. Composite materials Ans✓✓✓ b
(4-001-1.3) In order to produce greater efficiency, higher boiler
pressures were used and this led to _____ due to employing of
unqualified operators in a power plant.
Select one:
a. Economic gains
b. Serious accidents
c. Higher efficiency
d. Safer working conditions Ans✓✓✓ b
(4-009-1.4) The mass of an object may be measured in:
Select one:
a. Joules
b. kg
c. Newtons
d. kJ/kg Ans✓✓✓ b
,(4-009-1.8) The rate of change of velocity is called:
Select one:
a. Mass
b. Force
c. Acceleration
d. Weight Ans✓✓✓ c
(4-010-2.2) A lever, 10m long, pivots at one end and has a load of 900
kg suspended from the other end. What upward force must be applied at
the midpoint of the lever to obtain equilibrium?
Select one:
a. 882.9 N
b. 4414.4 N
c. 8829 N
d. 17 658 N Ans✓✓✓ d
(4-010-2.7) A 7m long bar is pivoted at 2m from the left end. A force of
60N is applied downwards on the left end and a force of 20N is applied
downward on the right end. What would be the clockwise and counter-
clockwise moments about the pivot, due to each force, and in which
direction would the bar rotate?
Select one:
a. 120Nm counter-clockwise, 100Nm clockwise, clockwise rotation.
,b. 120Nm counter-clockwise, 100Nm clockwise, counter-clockwise
rotation.
c. 80Nm counter-clockwise, 100Nm clockwise, counter-clockwise
rotation.
d. 60Nm counter-clockwise, 100Nm clockwise, clockwise rotation.
Ans✓✓✓ b
(4-011-1.2) A lever is used to move a load of 10kN by applying an effort
of 1000N. What is the mechanical advantage of the lever?
Select one:
a. 100
b. 1000
c. 10
d. 1 Ans✓✓✓ c
(4-012-1.11) With reference to scalars and vectors, a space diagram:
Select one:
a. Illustrates a system of scalars.
b. Illustrates a system of vectors.
c. Shows the relationship of the scalar to the vector.
d. Shows the relationship of time to the vector. Ans✓✓✓ b
(4-013-2.4) A car travels a total of 350km. The journey involves a total
of 3 hours driving time and 45 minutes of stop time. What is the average
journey speed?
, Select one:
a. 107.7 km/h
b. 116.7 km/h
c. 71.7 km/h
d. 93.3 km/h Ans✓✓✓ d
(4-014-1.4) A simple machine is required to raise 1 tonne of stones a
vertical distance of 30m. If the efficiency of the pulley is 100%, how
much work must be done on the pulley to raise the stone?
Select one:
a. 35 kJ
b. 294.27 kJ
c. 294.3 J
d. 30 kJ Ans✓✓✓ b
(4-014-2.1) What is the absolute pressure if the gauge pressure in a
steam cylinder is 200kPa? (Atmospheric pressure is 101.3 kPa.)
Select one:
a. 200 kPa
b. 200.3 kPa
c. 301.3 Pa
d. 301.3 kPa Ans✓✓✓ d
(4-015-1.2) Which of the following statements is FALSE?
( 4-081-1.20) The yoke that supports the main components of the DC
machine is frequently made of:
Select one:
a. Aluminum
b. Steel or iron
c. Copper or brass
d. Composite materials Ans✓✓✓ b
(4-001-1.3) In order to produce greater efficiency, higher boiler
pressures were used and this led to _____ due to employing of
unqualified operators in a power plant.
Select one:
a. Economic gains
b. Serious accidents
c. Higher efficiency
d. Safer working conditions Ans✓✓✓ b
(4-009-1.4) The mass of an object may be measured in:
Select one:
a. Joules
b. kg
c. Newtons
d. kJ/kg Ans✓✓✓ b
,(4-009-1.8) The rate of change of velocity is called:
Select one:
a. Mass
b. Force
c. Acceleration
d. Weight Ans✓✓✓ c
(4-010-2.2) A lever, 10m long, pivots at one end and has a load of 900
kg suspended from the other end. What upward force must be applied at
the midpoint of the lever to obtain equilibrium?
Select one:
a. 882.9 N
b. 4414.4 N
c. 8829 N
d. 17 658 N Ans✓✓✓ d
(4-010-2.7) A 7m long bar is pivoted at 2m from the left end. A force of
60N is applied downwards on the left end and a force of 20N is applied
downward on the right end. What would be the clockwise and counter-
clockwise moments about the pivot, due to each force, and in which
direction would the bar rotate?
Select one:
a. 120Nm counter-clockwise, 100Nm clockwise, clockwise rotation.
,b. 120Nm counter-clockwise, 100Nm clockwise, counter-clockwise
rotation.
c. 80Nm counter-clockwise, 100Nm clockwise, counter-clockwise
rotation.
d. 60Nm counter-clockwise, 100Nm clockwise, clockwise rotation.
Ans✓✓✓ b
(4-011-1.2) A lever is used to move a load of 10kN by applying an effort
of 1000N. What is the mechanical advantage of the lever?
Select one:
a. 100
b. 1000
c. 10
d. 1 Ans✓✓✓ c
(4-012-1.11) With reference to scalars and vectors, a space diagram:
Select one:
a. Illustrates a system of scalars.
b. Illustrates a system of vectors.
c. Shows the relationship of the scalar to the vector.
d. Shows the relationship of time to the vector. Ans✓✓✓ b
(4-013-2.4) A car travels a total of 350km. The journey involves a total
of 3 hours driving time and 45 minutes of stop time. What is the average
journey speed?
, Select one:
a. 107.7 km/h
b. 116.7 km/h
c. 71.7 km/h
d. 93.3 km/h Ans✓✓✓ d
(4-014-1.4) A simple machine is required to raise 1 tonne of stones a
vertical distance of 30m. If the efficiency of the pulley is 100%, how
much work must be done on the pulley to raise the stone?
Select one:
a. 35 kJ
b. 294.27 kJ
c. 294.3 J
d. 30 kJ Ans✓✓✓ b
(4-014-2.1) What is the absolute pressure if the gauge pressure in a
steam cylinder is 200kPa? (Atmospheric pressure is 101.3 kPa.)
Select one:
a. 200 kPa
b. 200.3 kPa
c. 301.3 Pa
d. 301.3 kPa Ans✓✓✓ d
(4-015-1.2) Which of the following statements is FALSE?
