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100+ Free CPCS A40 Slinger / Signaller Theory Test Practice Questions

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Key Facts: CPCS A40 Slinger / Signaller Theory Test Exam

The CPCS A40 Slinger / Signaller Theory Test assesses knowledge of sling selection, SWL/WLL calculation, BS 7121 hand and radio signals, load weight estimation, CoG positioning, and LOLER/PUWER safe lifting exclusion zones. Disclose: This is an English-language MCQ study adaptation for the official assessment; it does not replace required practical, oral, written, or hands-on performance.

Sample CPCS A40 Slinger / Signaller Theory Test Practice Questions

Try these sample questions to test your CPCS A40 Slinger / Signaller Theory Test exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under Regulation 9 of the UK Lifting Operations and Lifting Equipment Regulations 1998 (LOLER), what is the maximum legal interval between Thorough Examinations for lifting accessories such as slings, shackles, and eyebolts?
A.3 months
B.6 months
C.12 months
D.24 months
Explanation: Under LOLER Regulation 9(3)(a)(i), all lifting accessories (slings, shackles, eyebolts, chain components) must undergo a Thorough Examination by a competent person at least once every 6 months (or in accordance with an approved examination scheme).
2According to BS 7121 hand signal standards, how should a slinger/signaller signal an 'Emergency Stop' to the crane operator?
A.Extend one arm horizontally with the palm facing down and hold it still
B.Extend both arms horizontally and move them rapidly back and forth across the front of the body
C.Wave a single hand above the head in a rapid circular motion
D.Clasp both hands together above the head
Explanation: In accordance with BS 7121 Code of Practice for Safe Use of Cranes, the standard hand signal for an Emergency Stop is extending both arms horizontally and moving them back and forth horizontally across the body.
3What does the abbreviation WLL stand for on a lifting sling or accessory rating plate?
A.Working Load Limit
B.Weighted Lifting Load
C.Workplace Loading Limit
D.Withstanding Load Limit
Explanation: WLL stands for Working Load Limit. It represents the maximum force or mass that a lifting accessory is certified by the manufacturer to withstand under standard vertical inline loading conditions.
4When applying a choke hitch (reeved sling) around a smooth, rectangular load using a synthetic webbing sling, what mode factor derating must be applied to the sling's inline WLL?
A.1.0 (100% of WLL)
B.0.8 (80% of WLL)
C.0.5 (50% of WLL)
D.1.4 (140% of WLL)
Explanation: A choke hitch bends the sling around itself, introducing localized bending stress and friction. Standard mode factor derating for a choke hitch reduces the rated capacity to 0.8 (80%) of the inline Working Load Limit.
5What is the primary function of attaching a tagline to a long or unwieldy suspended crane load?
A.To take a portion of the load weight off the crane hook
B.To allow ground personnel to control load rotation and orientation from a safe distance
C.To replace the need for a signaller during blind lifts
D.To secure the load to nearby permanent structures during lifting
Explanation: Taglines are control ropes attached to suspended loads to enable slinger/signallers to guide, orient, and steady the load while staying well outside the hazard zone below the lift path.
6Where must the crane hook be positioned relative to a load's center of gravity (CoG) before initiating a lift?
A.Directly above the center of gravity
B.Slightly toward the heavier end to prevent lifting the heavy end first
C.Directly over the geometrical center regardless of weight distribution
D.1 meter offset from the center of gravity toward the crane cab
Explanation: The crane hook must be plumbed directly above the load's center of gravity. If the hook is offset, the load will swing laterally as soon as it leaves the ground to bring its CoG directly below the hook point.
7During pre-use visual inspection of a Grade 80 alloy steel chain sling, which defect requires immediate withdrawal of the sling from service?
A.Presence of manufacturer's identification tag
B.Surface rust on unpainted chain links
C.A bent link or a stretch exceeding 5% of original link length
D.Light oil coating applied by maintenance staff
Explanation: Chain elongation (stretching) exceeding 5%, bent or twisted links, or deep gouges indicate severe overload or structural deformation, requiring immediate withdrawal and disposal under BS EN 818 standards.
8What is the mandatory protocol if two-way radio contact between the crane operator and the signaller drops out during a blind lift?
A.The operator continues the movement slowly for 10 seconds expecting contact to resume
B.The operator immediately stops all crane operations until radio contact is fully restored
C.The signaller runs to the cab to give hand signals while the load hangs suspended
D.The operator uses automatic limit switches to complete the positioning sequence
Explanation: Under BS 7121 protocols, continuous communication is required during blind lifts. If radio signal is lost or interrupted, the crane operator must immediately halt all movements until clear contact is re-established.
9Under HSE Guidance Note GS6, what is the minimum safe clearance distance required between a crane jib and overhead power lines carried on wooden poles (up to 33 kV)?
A.3 meters
B.6 meters plus jib reach
C.9 meters plus maximum jib reach
D.15 meters plus maximum jib reach
Explanation: HSE GS6 guidance requires maintaining an absolute minimum exclusion distance of 9 meters plus the maximum reach of the crane jib/boom from overhead lines on wooden poles, unless lines are isolated and earthed.
10Which BS 7121 hand signal is performed by holding one arm horizontal with the hand closed and the thumb pointing upward?
A.Hoist load
B.Lower load
C.Derrick in (Jib up)
D.Derrick out (Jib down)
Explanation: Under BS 7121, extending the arm horizontally with a closed fist and thumb pointing upward signals 'Derrick in' (raise the crane jib/boom angle).

About the CPCS A40 Slinger / Signaller Theory Test Exam

The CPCS A40 Slinger / Signaller qualification validates the competence of site personnel responsible for slinging loads and directing crane movements during lifting operations in the UK. Candidates must demonstrate thorough knowledge of lifting equipment inspection, sling angle factor calculations, weight and center of gravity estimation, BS 7121 hand and radio signals, LOLER 1998 and PUWER 1998 regulatory compliance, Lift Plans, and exclusion zone safety. Note: This is an English-language MCQ study adaptation for the official assessment; it does not replace required practical, oral, written, or hands-on performance.

Questions

25 scored questions

Time Limit

45 - 60 minutes

Passing Score

80%

Exam Fee

£150 - £350 (varies by training provider and card type) (NOCN Approved CPCS Test Centres)

CPCS A40 Slinger / Signaller Theory Test Exam Content Outline

25%

Lifting Accessories, Slings & SWL/WLL Calculations

Chain, wire rope, and synthetic fiber webbing slings; Working Load Limit (WLL) vs Safe Working Load (SWL) definitions; Mode factors, choke hitch, basket hitch, and sling angle deratings; Shackles, eyebolts, spreader beams, and lifting beams; Pre-use inspection, color coding, thoroughly examined certification, and rejection criteria

25%

Crane Signals & Radio Communication (BS 7121)

Standard hand signals according to BS 7121 Code of Practice; Emergency stop, stop, hoist, lower, slew, jib up/down, line in/out signals; Radio communication protocols, clear line of sight, and blind lifting procedures; Call signs, pre-lift radio checks, continuous signal confirmation, and loss-of-signal procedures; Responsibilities of the signaller vs crane operator during load movements

25%

Load Weight Estimation & Center of Gravity

Material density values (steel, concrete, timber, water, earth/aggregates); Volume calculations for rectangular, cylindrical, and composite objects; Locating the center of gravity (CoG) on symmetrical and asymmetrical loads; Hook positioning above CoG to prevent tilting, sliding, and unexpected load swings; Calculating sling tensions when slinging loads with offset centers of gravity

25%

Safe Lifting Operations & Exclusion Zones

LOLER 1998 and PUWER 1998 legal requirements and duty holder roles (AP, Crane Supervisor, Slinger/Signaller); Lift Plans, Risk Assessments, and Method Statements (RAMS); Exclusion zone establishment, perimeter barriers, and public safety; Overhead power line clearances (GS6 guidance) and proximity hazards; Environmental factors: wind speed thresholds, ground conditions, outrigger mats, and tag line usage

How to Pass the CPCS A40 Slinger / Signaller Theory Test Exam

What You Need to Know

  • Passing score: 80%
  • Exam length: 25 questions
  • Time limit: 45 - 60 minutes
  • Exam fee: £150 - £350 (varies by training provider and card type)

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

CPCS A40 Slinger / Signaller Theory Test Study Tips from Top Performers

1Memorize mode factors: straight vertical (1.0), choke hitch (0.8), basket hitch 90 deg (1.4), basket hitch 0-45 deg included angle (1.4 for 2-leg).
2Remember standard density figures: steel = 7,850 kg/m³, concrete = 2,400 kg/m³, water = 1,000 kg/m³, timber = 600-800 kg/m³.
3Practice standard BS 7121 hand signals: emergency stop (both arms extended horizontally, moved back and forth), stop (one arm extended horizontally), hoist (forearm vertical, finger pointing up moving in small circle).
4Always verify that lifting equipment has a valid Thorough Examination report (6 months for lifting accessories under LOLER Regulation 9).
5Understand roles under LOLER: Appointed Person plans the lift, Crane Supervisor supervises on site, Slinger/Signaller attaches load and signals operator.

Frequently Asked Questions

What is the CPCS A40 Slinger / Signaller test?

The CPCS A40 Slinger / Signaller test is a UK safety and operational assessment administered under NOCN CPCS that verifies a candidate's ability to safely attach loads to lifting equipment, calculate sling angles and capacities, signal crane operators using BS 7121 standard hand/radio signals, and enforce lift plan safety controls under LOLER 1998.

What is the difference between WLL and SWL?

Working Load Limit (WLL) is the maximum mass or force which the lifting accessory is authorized to sustain specified by the manufacturer under standard inline loading conditions. Safe Working Load (SWL) is the maximum load that the accessory can safely lift in a specific working configuration (accounting for hitch mode, sling angles, or environmental conditions).

What is the minimum safe clearance distance from overhead power lines under GS6?

Under HSE Guidance Note GS6, crane booms and suspended loads must maintain a minimum clearance of 15 meters plus maximum jib reach from overhead lines on steel towers/pylons, and 9 meters plus jib reach from lines on wooden poles, unless isolated.

Does this 100-question practice bank replace practical CPCS training or assessment?

No. This is an English-language MCQ study adaptation for the official assessment; it does not replace required practical, oral, written, or hands-on performance.