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WIESEN TEST OF MECHANICAL APTITUDE (WTMA)
CERTIFICATION ACTUAL EXAM PREP 2026 ALL
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES ALREADY A GRADED WITH
EXPERT FEEDBACK |NEW AND REVISED
1. A gear with 20 teeth drives another gear with 40 teeth. If the first
gear rotates at 120 RPM, how fast will the second gear rotate?
A. 240 RPM
B. 60 RPM
C. 120 RPM
D. 30 RPM
The gear ratio is determined by the number of teeth. A 20-tooth gear
driving a 40-tooth gear creates a 2:1 ratio. The driven gear rotates at
half the speed of the driving gear: 120 RPM ÷ 2 = 60 RPM.
2. A pulley system with 4 supporting ropes lifts a 200 kg load. If the
efficiency is 80%, what is the minimum effort force required to lift
the load? (g = 9.8 m/s²)
A. 490 N
B. 612.5 N
C. 735 N
D. 980 N
Ideal mechanical advantage = 4. Ideal effort = (200 kg × 9.8 m/s²) ÷ 4
= 490 N. With 80% efficiency, actual effort = 490 N ÷ 0.80 = 612.5 N.
3. A screw jack has a lever arm of 0.5 m and a screw pitch of 5 mm.
What is the mechanical advantage?
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A. 314
B. 628
C. 157
D. 100
Mechanical advantage = (2 × π × lever arm) ÷ pitch = (2 × 3.14 × 0.5
m) ÷ 0.005 m = 3.14 ÷ 0.005 = 628.
4. Which of the following best describes Newton's First Law of
Motion?
A. Force equals mass times acceleration
B. An object at rest stays at rest, and an object in motion stays in
motion unless acted upon by an external force
C. For every action, there is an equal and opposite reaction
D. Energy cannot be created or destroyed
Newton's First Law (the law of inertia) states that an object will
remain at rest or in uniform motion in a straight line unless acted
upon by an external force. Option A describes the Second Law, and
Option C describes the Third Law.
5. In a first-class lever, where is the fulcrum located?
A. At one end of the lever
B. At the load end
C. Between the effort and the load
D. Below the load
A first-class lever has the fulcrum positioned between the effort
(applied force) and the load (resistance). Examples include a seesaw
and a crowbar.
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6. Which of the following best describes a fixed pulley?
A. It multiplies force but changes the direction of effort
B. It changes the direction of effort but provides no mechanical
advantage
C. It multiplies both force and speed
D. It reduces the effort required to lift a load by half
A fixed pulley changes the direction of the applied force (you pull
down to lift a load up) but does not provide any mechanical
advantage—the effort required equals the load.
7. How does a movable pulley differ from a fixed pulley in terms of
mechanical advantage?
A. A movable pulley changes direction; a fixed pulley does not
B. A movable pulley provides a mechanical advantage of 2; a fixed
pulley provides no mechanical advantage
C. A movable pulley requires more effort than a fixed pulley
D. There is no difference in mechanical advantage
A movable pulley supports the load with two rope segments, providing
a mechanical advantage of 2 (the effort required is half the load). A
fixed pulley only changes direction and provides no mechanical
advantage.
8. Which of the following is an example of a second-class lever?
A. A seesaw
B. A wheelbarrow
C. A pair of tweezers
D. A fishing rod
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A wheelbarrow is a second-class lever, where the load is between the
fulcrum (wheel axle) and the effort (handles). A seesaw is a first-class
lever, and tweezers and fishing rods are third-class levers.
9. A 10 kg object is placed on a balance scale 2 meters from the
fulcrum. How far from the fulcrum must a 5 kg object be placed to
balance the scale?
A. 1 meter
B. 4 meters
C. 2 meters
D. 8 meters
For a balance scale, torque on one side must equal torque on the
other: 10 kg × 2 m = 5 kg × d. Therefore, d = 20 ÷ 5 = 4 meters.
10. Which of the following will stay colder longer: a pitcher of water
with a lid or a pitcher of water without a lid?
A. The pitcher without a lid
B. The pitcher with a lid
C. Both will stay the same temperature
D. It depends on the material of the pitcher
A lid reduces heat transfer by convection and evaporation, helping the
water stay colder longer. This is an example of thermal insulation.
11. Two metal rods—one copper and one steel—are heated at one
end. Which rod will conduct heat to the other end faster?
A. The steel rod
B. The copper rod
WIESEN TEST OF MECHANICAL APTITUDE (WTMA)
CERTIFICATION ACTUAL EXAM PREP 2026 ALL
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES ALREADY A GRADED WITH
EXPERT FEEDBACK |NEW AND REVISED
1. A gear with 20 teeth drives another gear with 40 teeth. If the first
gear rotates at 120 RPM, how fast will the second gear rotate?
A. 240 RPM
B. 60 RPM
C. 120 RPM
D. 30 RPM
The gear ratio is determined by the number of teeth. A 20-tooth gear
driving a 40-tooth gear creates a 2:1 ratio. The driven gear rotates at
half the speed of the driving gear: 120 RPM ÷ 2 = 60 RPM.
2. A pulley system with 4 supporting ropes lifts a 200 kg load. If the
efficiency is 80%, what is the minimum effort force required to lift
the load? (g = 9.8 m/s²)
A. 490 N
B. 612.5 N
C. 735 N
D. 980 N
Ideal mechanical advantage = 4. Ideal effort = (200 kg × 9.8 m/s²) ÷ 4
= 490 N. With 80% efficiency, actual effort = 490 N ÷ 0.80 = 612.5 N.
3. A screw jack has a lever arm of 0.5 m and a screw pitch of 5 mm.
What is the mechanical advantage?
,2|Page
A. 314
B. 628
C. 157
D. 100
Mechanical advantage = (2 × π × lever arm) ÷ pitch = (2 × 3.14 × 0.5
m) ÷ 0.005 m = 3.14 ÷ 0.005 = 628.
4. Which of the following best describes Newton's First Law of
Motion?
A. Force equals mass times acceleration
B. An object at rest stays at rest, and an object in motion stays in
motion unless acted upon by an external force
C. For every action, there is an equal and opposite reaction
D. Energy cannot be created or destroyed
Newton's First Law (the law of inertia) states that an object will
remain at rest or in uniform motion in a straight line unless acted
upon by an external force. Option A describes the Second Law, and
Option C describes the Third Law.
5. In a first-class lever, where is the fulcrum located?
A. At one end of the lever
B. At the load end
C. Between the effort and the load
D. Below the load
A first-class lever has the fulcrum positioned between the effort
(applied force) and the load (resistance). Examples include a seesaw
and a crowbar.
,3|Page
6. Which of the following best describes a fixed pulley?
A. It multiplies force but changes the direction of effort
B. It changes the direction of effort but provides no mechanical
advantage
C. It multiplies both force and speed
D. It reduces the effort required to lift a load by half
A fixed pulley changes the direction of the applied force (you pull
down to lift a load up) but does not provide any mechanical
advantage—the effort required equals the load.
7. How does a movable pulley differ from a fixed pulley in terms of
mechanical advantage?
A. A movable pulley changes direction; a fixed pulley does not
B. A movable pulley provides a mechanical advantage of 2; a fixed
pulley provides no mechanical advantage
C. A movable pulley requires more effort than a fixed pulley
D. There is no difference in mechanical advantage
A movable pulley supports the load with two rope segments, providing
a mechanical advantage of 2 (the effort required is half the load). A
fixed pulley only changes direction and provides no mechanical
advantage.
8. Which of the following is an example of a second-class lever?
A. A seesaw
B. A wheelbarrow
C. A pair of tweezers
D. A fishing rod
, 4|Page
A wheelbarrow is a second-class lever, where the load is between the
fulcrum (wheel axle) and the effort (handles). A seesaw is a first-class
lever, and tweezers and fishing rods are third-class levers.
9. A 10 kg object is placed on a balance scale 2 meters from the
fulcrum. How far from the fulcrum must a 5 kg object be placed to
balance the scale?
A. 1 meter
B. 4 meters
C. 2 meters
D. 8 meters
For a balance scale, torque on one side must equal torque on the
other: 10 kg × 2 m = 5 kg × d. Therefore, d = 20 ÷ 5 = 4 meters.
10. Which of the following will stay colder longer: a pitcher of water
with a lid or a pitcher of water without a lid?
A. The pitcher without a lid
B. The pitcher with a lid
C. Both will stay the same temperature
D. It depends on the material of the pitcher
A lid reduces heat transfer by convection and evaporation, helping the
water stay colder longer. This is an example of thermal insulation.
11. Two metal rods—one copper and one steel—are heated at one
end. Which rod will conduct heat to the other end faster?
A. The steel rod
B. The copper rod
