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Sample SHGM Part-66 B1 Practice Questions
Try these sample questions to review concepts for the SHGM Part-66 B1 exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 30+ question experience with AI tutoring.
1A hydraulic piston has effective area 0.003 m² and pressure difference 200,000 Pa. Ignoring losses, what force does it produce?
A.60 N
B.600 N
C.6,000 N
D.66,667 N
Explanation: Force equals pressure difference multiplied by area. Thus 200,000 × 0.003 = 600 N.
2A constant 600 N force moves a load 2 m in the force's direction. What work is done?
A.300 J
B.600 J
C.1,200 J
D.3,600 J
Explanation: Work is force multiplied by displacement in its direction. The result is 600 × 2 = 1,200 joules.
3Two equal-length rods have expansion coefficients 23 and 12 micrometres per metre per °C. For the same temperature rise, which expands more?
A.The rod with coefficient 12
B.The rod with coefficient 23
C.Both expand equally
D.The coefficient determines mass, not expansion
Explanation: Linear expansion is proportional to coefficient, original length and temperature change. With length and temperature change equal, the larger coefficient produces more expansion.
4What is the period of a 400 Hz electrical waveform?
A.0.25 ms
B.2.5 ms
C.25 ms
D.400 ms
Explanation: Period is the reciprocal of frequency. 1/400 second = 0.0025 second = 2.5 ms.
5A 3 Ω resistor is connected across a 12 V DC supply. What current flows?
A.0.25 A
B.3 A
C.4 A
D.36 A
Explanation: Ohm's law gives I = V/R. Therefore 12/3 = 4 A.
6A 24 V supply feeds 6 Ω and 12 Ω resistors in parallel. What total current is drawn?
A.1.33 A
B.2 A
C.4 A
D.6 A
Explanation: Branch currents are 24/6 = 4 A and 24/12 = 2 A. Parallel branch currents add to 6 A.
7An ideal transformer has 100 primary turns and 50 secondary turns. With 28 V AC on the primary, what secondary voltage is expected?
A.7 V AC
B.14 V AC
C.28 V AC
D.56 V AC
Explanation: Voltage ratio equals turns ratio in an ideal transformer. Secondary voltage is 28 × 50/100 = 14 V AC.
8What decimal value is represented by unsigned binary 1101?
A.11
B.12
C.13
D.14
Explanation: The active place values are 8, 4 and 1. Their sum is 13.
9A torque wrench has effective length 150 mm. An in-line adapter adds 50 mm. Using setting = required torque × wrench length / total length, what setting produces 40 N m?
A.20 N m
B.30 N m
C.40 N m
D.53.3 N m
Explanation: The total effective length is 200 mm. The setting is 40 × 150/200 = 30 N m, under the stated in-line geometry.
10Which combination promotes galvanic corrosion?
A.Dissimilar metals electrically connected in the presence of an electrolyte
B.Identical dry nonconductive materials separated from each other
C.Only high temperature with no electrical path
D.Any painted surface regardless of exposure or damage
Explanation: Galvanic corrosion requires an electrochemical couple and an electrolyte. Compatible materials and approved protective barriers reduce the risk.
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