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WorksheetsSystems Engineering Exam (2021)
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
The lever in the diagram below is used to lift a load of 60 N. The effort force, Fe, required to lift the load is
a)
20 N
b)
60 N
c)
180 N
d)
240 N
2.
Which of the following gives the resistance and the tolerance of the resistor shown above?
a)
251 Ω ± 5%
b)
251 Ω ± 10%
c)
250 Ω ± 5%
d)
250 Ω ± 10%
3.
A 7.5 kg mass that is attached to a rigid cable is accelerated horizontally to the right at 0.3 m s−2 on a smooth, frictionless surface, as shown in the diagram below. Ignore the mass of the cable. The tension in the cable is closest to
a)
0.04 N
b)
2.3 N
c)
23 N
d)
75 N
4.
The diagram below shows an ideal pulley system being used to raise a load of 960 N vertically upwards. The effort applied by the worker is closest to
a)
160 N
b)
240 N
c)
320 N
d)
480 N
5.
The diagram below shows a linkage mechanism that is connected to a motor. When the motor rotates clockwise, the motion produced by the wiper is
a)
rotary
b)
linear
c)
oscillating
d)
reciprocating
6.
A wheel is used to open the valve shown below. The valve requires 18 N m to open. The operator can apply<br />a total force of 90 N on the wheel. In order for the operator to open the valve, which wheel diameter is required?
a)
10 cm
b)
20 cm
c)
30 cm
d)
40 cm
7.
A cam and follower mechanism is shown in the diagram below. The two types of motion produced by the mechanism are
a)
oscillating and linear
b)
oscillating and rotary
c)
rotary and reciprocating
d)
oscillating and reciprocating
8.
A lifting device with a mechanical advantage of 6.5 elevates an object of mass 52 kg. Taking acceleration due to gravity to be 10 m s−2, the input force of this system is closest to
a)
8 N
b)
80 N
c)
338 N
d)
3380 N
9.
A conveyor belt uses 2000 J of electrical energy in one minute. During this time, it was measured to produce 200 J in sound energy and 500 J in heat energy throughout the system. Which one of the following gives the mechanical energy of the conveyor belt?
a)
300 J
b)
700 J
c)
1300 J
d)
2000 J
10.
The gear ratio of the compound gears shown above is
a)
1;3
b)
1;6
c)
3;1
d)
6;1
11.
Which one of the following gives the name of the component shown above?
a)
relay switch
b)
pull solenoid
c)
hydraulic cylinder
d)
pneumatic actuator
12.
The diagram below shows a pulley system. Which of the following gives the motion of the pulleys P1 and P2?
a)
clockwise, clockwise
b)
anticlockwise, clockwise
c)
clockwise, anticlockwise
d)
anticlockwise, anticlockwise
13.
Which one of the following components would be best suited to act as a simple voltage regulator?
a)
resistor
b)
capacitor
c)
light globe
d)
Zener diode
14.
Which one of the following is a passive component whose resistance varies with respect to receiving light on its surface?
a)
light globe
b)
neon lamp
c)
light-emitting diode
d)
light-dependent resistor
15.
Which of the following gives the characteristics of a polarised capacitor?
a)
A
b)
B
c)
C
d)
D
16.
A counterweight is often used in machines, such as the crane shown in the diagram below, to make lifting<br />a heavy load safer and more efficient. Which one of the following forces acting on the crane is responsible for the counterweight providing the mechanical stability of the crane?
a)
tension
b)
friction
c)
compression
d)
gravitational
17.
A microphone is a type of transducer, converting one type of energy into another. Which of the following gives the correct type of input energy and output energy for a microphone?
a)
Mechanical Energy Sound Energy
b)
Sound Energy Electrical Energy
c)
Sound Energy Mechanical Energy
d)
Electrical Energy Sound Energy
18.
Torsion can best be described as a force that
a)
bends
b)
twists
c)
shears
d)
compresses
19.
The power of a DC motor that draws a current of 30 mA and is operated on a 12 V power supply is
a)
0.36 W
b)
2.5 W
c)
3.6 W
d)
360 W
20.
The process of risk assessment has four common steps that should be carried out in sequential order. Which of the following gives the correct order in which to carry out the steps of risk assessment?
a)
identify hazards → assess/evaluate risks → implement controls → review
b)
assess/evaluate risks → review → identify hazards → implement controls
c)
review → implement controls → identify hazards → assess/evaluate risks
d)
implement controls → review → assess/evaluate risks → identify hazards
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