CSLB Class A — General Engineering (Trade Exam) — All Questions

Falsework 10 feet high with 12-foot spans and no traffic through it. Who may sign the falsework plan?

• a.Only the building official
• b.No signature is required
• c.Only a registered civil engineer
• d.An engineer or qualified representative✓

Installations below the engineer thresholds may be signed by a California civil engineer, a manufacturer's authorized representative, or a qualified licensed contractor's representative.Cal. Code Regs. tit. 8, 1717

Butt-spliced wood shores are scabbed. How far past the joint must the scabs extend?

• a.At least 4 feet
• b.At least 6 inches
• c.At least 1 foot
• d.At least 2 feet✓

Scabs on butt-spliced wood shores extend at least two feet beyond the joint.Cal. Code Regs. tit. 8, 1717

When is the first set of perimeter guardrails installed during formwork erection?

• a.Only for decks over 36 feet high
• b.After all formwork is complete
• c.Immediately after supporting members are in place✓
• d.After the concrete is placed

The first set of protective guardrails goes in at the perimeter immediately after the supporting members are in place.Cal. Code Regs. tit. 8, 1717

What does Caltrans prohibit for holding forms in position?

• a.Form fasteners
• b.Twisted wire ties✓
• c.Wales
• d.Form oil

Form fasteners prevent spreading; twisted wire ties are not used to hold forms in position.Caltrans Standard Specifications (2025) 51-1.03C

What minimum size of chamfer strip does Caltrans require at sharp edges of exposed concrete?

• a.1/4 by 1/4 inch
• b.1/2 by 1/2 inch
• c.3/4 by 3/4 inch✓
• d.2 by 2 inches

Forms for exposed surfaces have triangular fillets at least 3/4 by 3/4 inch.Caltrans Standard Specifications (2025) 51-1.03C

What is done to forms and subgrade immediately before concrete is placed?

• a.Heat them
• b.Cover them with plastic
• c.Moisten them with water✓
• d.Dust them with cement

Caltrans requires thoroughly moistening forms and subgrade immediately before placing concrete.Caltrans Standard Specifications (2025) 51-1.03D

A seal course is placed with a tremie. How thick must the seal course be at minimum?

• a.1 foot
• b.4 feet
• c.6 inches
• d.2 feet✓

The seal course must be at least 2 feet thick and thick enough to seal the cofferdam.Caltrans Standard Specifications (2025) 51-1.03D

What is the nominal slump range for cast-in-place concrete piles in the Caltrans table?

• a.5 to 7 inches✓
• b.0 to 1 inch
• c.1 to 3 inches
• d.6 to 8 inches

The Caltrans table lists a nominal slump of 5 to 7 inches for CIP concrete piles.Caltrans Standard Specifications (2025) 90-1.02G

During water curing, how close must the curing media stay to the concrete surface?

• a.Within 1 foot
• b.Within 3 inches✓
• c.Touching only at the edges
• d.Within 12 inches

Curing media are kept within 3 inches of the concrete at all points along the surface being cured.Caltrans Standard Specifications (2025) 90-1.03B

What protects the head of a driven pile from the hammer?

• a.A steel shim plate only
• b.Wet sand on the pile head
• c.Nothing is required
• d.A cushion driving block✓

Caltrans requires protecting pile heads from direct impact with a cushion driving block.Caltrans Standard Specifications (2025) 49-2.01C

What equipment must be on standby during a CIDH pile pour under slurry?

• a.A spare tremie hopper only
• b.Standby concrete and slurry pumps✓
• c.A backup vibrator
• d.A second concrete supplier only

A fully operational standby concrete pump and slurry pump must be on site during concrete placement.Caltrans Standard Specifications (2025) 49-3