___________________________________________________________________
Texas Skilled Trades & Construction
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
___________________________________________________________________
1. What is the primary purpose of a construction safety program?
A. Increase material costs
B. Reduce accidents and injuries
C. Eliminate inspections
D. Increase project duration
Answer: Reduce accidents and injuries
Rationale: A safety program identifies hazards, establishes safe work
procedures, and helps prevent injuries, property damage, and work stoppages.
2. Which type of PPE provides protection against falling objects striking the
head?
A. Safety glasses
B. Earplugs
C. Hard hat
D. Respirator
Answer: Hard hat
,Rationale: A properly rated hard hat protects the head from impact and certain
electrical hazards.
3. What is the safest practice before servicing energized electrical equipment?
A. Spray it with water
B. De-energize and lock out the equipment
C. Remove the grounding conductor
D. Increase the voltage
Answer: De-energize and lock out the equipment
Rationale: Lockout/tagout prevents unexpected energization while maintenance
or repair is being performed.
4. What device protects a circuit from excessive current?
A. Transformer
B. Circuit breaker
C. Receptacle
D. Thermostat
Answer: Circuit breaker
Rationale: A circuit breaker opens the circuit when current exceeds its permitted
level.
5. What is the purpose of a grounding conductor?
A. Increase circuit voltage
B. Provide a low-impedance path for fault current
C. Reduce wire size
D. Increase resistance
Answer: Provide a low-impedance path for fault current
Rationale: The grounding path helps fault current return to the source so the
overcurrent protective device can operate.
, 6. In electrical calculations, Ohm's Law is expressed as:
A. P = I/R
B. E = IR
C. R = EI
D. I = ER
Answer: E = IR
Rationale: Ohm's Law states that voltage equals current multiplied by
resistance.
7. A 120-volt circuit draws 10 amperes. What is its approximate power?
A. 12 watts
B. 120 watts
C. 1,200 watts
D. 12,000 watts
Answer: 1,200 watts
Rationale: Power is calculated as P = E × I, so 120 × 10 = 1,200 watts.
8. What tool is commonly used to measure electrical voltage?
A. Pipe wrench
B. Voltmeter
C. Level
D. Micrometer
Answer: Voltmeter
Rationale: A voltmeter measures electrical potential difference between two
points.
9. What is the purpose of an electrical disconnect?
A. Store electricity
B. Provide a means to disconnect equipment from its power source
, C. Increase current
D. Reduce conductor length
Answer: Provide a means to disconnect equipment from its power source
Rationale: Disconnecting means allow equipment to be isolated for servicing
and maintenance.
10.What should be done if an electrical conductor has damaged insulation?
A. Cover it with paint
B. Continue using it
C. Repair or replace it properly
D. Increase the circuit breaker size
Answer: Repair or replace it properly
Rationale: Damaged insulation can expose energized conductors and create
shock, arc, or fire hazards.
11.What is the primary function of a plumbing trap?
A. Increase water pressure
B. Prevent sewer gases from entering a building
C. Heat water
D. Filter drinking water
Answer: Prevent sewer gases from entering a building
Rationale: The water seal in a trap blocks gases from the drainage system from
entering occupied spaces.
12.Which pipe is commonly used for potable water distribution?
A. PVC DWV only
B. Copper tubing
C. Cast-iron soil pipe only
D. Corrugated cardboard
Texas Skilled Trades & Construction
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
___________________________________________________________________
1. What is the primary purpose of a construction safety program?
A. Increase material costs
B. Reduce accidents and injuries
C. Eliminate inspections
D. Increase project duration
Answer: Reduce accidents and injuries
Rationale: A safety program identifies hazards, establishes safe work
procedures, and helps prevent injuries, property damage, and work stoppages.
2. Which type of PPE provides protection against falling objects striking the
head?
A. Safety glasses
B. Earplugs
C. Hard hat
D. Respirator
Answer: Hard hat
,Rationale: A properly rated hard hat protects the head from impact and certain
electrical hazards.
3. What is the safest practice before servicing energized electrical equipment?
A. Spray it with water
B. De-energize and lock out the equipment
C. Remove the grounding conductor
D. Increase the voltage
Answer: De-energize and lock out the equipment
Rationale: Lockout/tagout prevents unexpected energization while maintenance
or repair is being performed.
4. What device protects a circuit from excessive current?
A. Transformer
B. Circuit breaker
C. Receptacle
D. Thermostat
Answer: Circuit breaker
Rationale: A circuit breaker opens the circuit when current exceeds its permitted
level.
5. What is the purpose of a grounding conductor?
A. Increase circuit voltage
B. Provide a low-impedance path for fault current
C. Reduce wire size
D. Increase resistance
Answer: Provide a low-impedance path for fault current
Rationale: The grounding path helps fault current return to the source so the
overcurrent protective device can operate.
, 6. In electrical calculations, Ohm's Law is expressed as:
A. P = I/R
B. E = IR
C. R = EI
D. I = ER
Answer: E = IR
Rationale: Ohm's Law states that voltage equals current multiplied by
resistance.
7. A 120-volt circuit draws 10 amperes. What is its approximate power?
A. 12 watts
B. 120 watts
C. 1,200 watts
D. 12,000 watts
Answer: 1,200 watts
Rationale: Power is calculated as P = E × I, so 120 × 10 = 1,200 watts.
8. What tool is commonly used to measure electrical voltage?
A. Pipe wrench
B. Voltmeter
C. Level
D. Micrometer
Answer: Voltmeter
Rationale: A voltmeter measures electrical potential difference between two
points.
9. What is the purpose of an electrical disconnect?
A. Store electricity
B. Provide a means to disconnect equipment from its power source
, C. Increase current
D. Reduce conductor length
Answer: Provide a means to disconnect equipment from its power source
Rationale: Disconnecting means allow equipment to be isolated for servicing
and maintenance.
10.What should be done if an electrical conductor has damaged insulation?
A. Cover it with paint
B. Continue using it
C. Repair or replace it properly
D. Increase the circuit breaker size
Answer: Repair or replace it properly
Rationale: Damaged insulation can expose energized conductors and create
shock, arc, or fire hazards.
11.What is the primary function of a plumbing trap?
A. Increase water pressure
B. Prevent sewer gases from entering a building
C. Heat water
D. Filter drinking water
Answer: Prevent sewer gases from entering a building
Rationale: The water seal in a trap blocks gases from the drainage system from
entering occupied spaces.
12.Which pipe is commonly used for potable water distribution?
A. PVC DWV only
B. Copper tubing
C. Cast-iron soil pipe only
D. Corrugated cardboard
